What class rubber glove is mandatory for working on energized 15KV?
B) Class 2
A _____ is a device that cannot interrupt a fault current but instead opens a circuit while the upstream multishot device has the circuit de-energized.
B) sectionalizer
A combination of electromotive force (volts) and current (amperes) is a measure of the rate of work being done. The unit of work is a _____ (1 volt X 1 ampere).
B) watt
Poly-phase metering refers to energy metering on more than one-phase service. A lineman normally refers to it as _____ metering.
B) three-phase
Power transformers in a transmission substation raise the voltage from the generation voltage to transmission levels.
True
Crawl spaces under the house and in attics shall be entered with care, because of the hazards that bumps cuts and falls.
True
Transmission lines are usually constructed for ______ and capability reasons.
A) economic
A _______ is the safest way to open a solid-blade or fused cutout.
D) load-bust tool
Next to lightning, ______ is (are) the most common cause of outages in an electrical system.
D) tree contact
Power transformers in substations change the _____ levels to permit interconnecting of the generators and circuits forming the electrical system.
B) voltage
Lenz's Law determined that any current that flows as a result of an induced voltage will flow in the direction to oppose the action that cause the voltage to be induced.
True
Coal at the present time is the most commonly used nuclear fuel.
False
A human body does have enough resistance to prevent fatal current flow through it when contact is made with primary voltage.
False
Lightning arresters and fuses are installed on distribution circuits to minimize _______.
B) customer outages
Underground conductors are insulated by a rubber or polyethylene covering. The insulation needs to be well protected because even a little damage will cause the voltage (pressure) to stress the damaged location and will eventually cause a short circuit in the cable.
True
Because people may have made contact with a 120-volt source and were not hurt, they mistakenly think that 120 volts will not hurt them; however, there are _________ when contact is made with that voltage.
C) fatalities
A residential 120/ 240 volt house service would consist of _____ conductor(s).
B) 3
According to ANSI-IEEE Standard 84.1, the electric distribution supplier must maintain steady state voltage +/- __% of the nominal voltage.
B) 5%
While performing tree clearance, do not rely on tools and procedures that prevent limbs, trees, and workers from making contact
False
Pruning and removing trees, especially near energized circuits, is high-risk work. This work should be reserved for
A) trained arborists
A set of conductors energized at voltages over _____ volts and transmitting large blocks of energy over relatively long distances is called a transmission circuit or transmission line.
B) 69,000
Tall-growing trees can interfere or block microwave-beam paths whose signals are used in monitoring and controlling the status of the system and operating switchgear.
True
An arc is more probable when opening than when closing a switch. It is the interruption of current that causes an arc.
True
When the voltage of a circuit is in doubt, reference can always be made to a _______.
C) nameplate of an existing transformer
Residential consumers have very similar usage patterns, so that a _____ can cover the fixed costs without much error.
A) minimum charge
A current coil in a meter is made up of a _____ number of turns of _____ wire
A) small, large
B) large, small
A) small, large
When connecting an A-base meter under energized conditions, it is critical to connect the current in _______
A) parallel
B) series
B) series
When a circuit is faulted, or short-circuited, all the _____ which the electrical system is able to supply to the faulted location goes to that fault.
D) current
When current passes through a resistance in a circuit, ______ is released.
A) heat
The key component distinguishing a conventional transformer and a CSP is the lack of _____ in the conventional model.
A) internal fusing
Small distribution transformers usually installed on overhead circuits are often referred to as ______ transformers.
B) pole-type
An electronic recloser has a low- voltage supply which must be in service to closer the recloser.
True
If a streetlight stays on 24 hours a day, you should replace ______.
B) photoelectric device (Photocell)
To _____ a circuit or apparatus, means to connect it to earth.
C) ground
In the Line Trade, amperage checks are frequently made because an improper voltage is the first indication that something is wrong.
False
A _____ hitch will allow the rope to slide through it, but can be snubbed with very little pull.
B) munter
Pressure is needed to overcome resistance, which impedes current flow in a circuit. Resistance or impedance is measured in _________
C) ohms
One gigawatt (GW) =
D) 1000MW
Impedance is another term for the opposition to current flow.
True
The amount of resistance offered by a conductor depends on the conductor's size and length.
True
_____ starting of a saw can be done safely only from the outside of the bucket of an aerial device.
B) Drop
One method of tree-climbing fall protection is the _____ method.
A) belay
The low-voltage wires that connect to the secondary main conductors and extend to the customer's service entrance are called _____
C) services
The nonreclose feature does not prevent an accident from occurring and does not guarantee that the circuit will trip out during an accident. When set in a nonreclose position, the recloser does not operate faster than normal.
True
Trimming only the limbs that are growing towards the powerline is known as ______.
D) directional pruning
Resistance is measured in _____.
C) Ohms
The wires extending from the distribution transformer to customers meter are called a ______.
A) service
Only transformers with the same polarity can be connected in parallel.
False
A _____ means that the utility must generate, transmit, transform, and distribute extra power to supply the inductive load.
A) low power factor
The electric facilities connecting the transmission system to the customer's equipment are called the ______.
A) distribution system
Air is ionized when electrons in orbit around the atoms are displaced because of being stressed by voltage.
True
The electrons of good conducting material, such as _______, are dislodged fairly easily.
D) copper or aluminum
There is not a difference of potential between the hands and feet of a person working on a tree that is in contact with an energized line.
False
The transformer nameplate provides necessary information to complete connections.
True
The fissioning process is maintained and controlled by the _____.
B) reactor
Additive polarity is standard for all single-phase transformers _____ and below having high-voltage ratings of 9000volts and below.
D) 200 kVA
The voltage where a tree makes contact with the line will be at _____
A) full-line voltage
An ammeter check can be made to confirm that no _____ is on a circuit before opening a nonload-break disconnect switch.
B) load
When electrical current meets resistance, _____ is produced.
D) heat
Subtractive polarity is standard for all single-phase distribution transformers above 200 kVA irrespective of voltage rating.
True
In the lines trade, the terms _____ and megavolt-ampere (MVA) are used when discussing power.
D) kilovolt-ampere (kVA)
In a sub-station, stand on a _____ that is bonded to the steel structure to ensure that the operator's feet and hands will be at the same potential if things go wrong.
A) ground gradient grid or mat
Service neutrals should never be grounded at the customer’s service entrance.
False
Peak demand for power tends to occur on _____ at the time of the evening meal.
D) the hottest and coldest days of the year
Harmonics are alternating current and voltage waveforms with frequencies that are multiples of the system frequency.
True
The standard taps available are on the primary windings of the transformer and are designed to raise or lower the winding turns in steps of _____ of the rated voltage.
A) 2.5%
In an electric utility circuit, reactive current makes up the bulk of the total impedance of a circuit.
False
A disconnect switch is any solid-blade switch that provides operating capability to isolate, sectionalize or transfer loads at strategic locations.
True
Ionization of air means that the air has become charged with atoms and that the air is changed from being an insulator to being a conductor.
True
What is the minimum working distance while tree trimming around 13.2 kV?
C) 2'1"
Brush is woody vegetation and is defined as _____ in diameter and is growing under a powerline.
B) 4-6 inches
Removing a tree that is leaning heavily on a powerline (during an outage ) or communications cable is a particularly unpredictable operation, and the tree should be pulled off by _______.
D) mechanical means
The quality of electrical service does not require that a customer's voltage is kept within an acceptable range.
True
The amount of power used over time measured in kilowatt-hours is _____.
A) energy
The longer the path through which the current has to flow and the higher the resistance of that path, the _____ the current.
A) lower
B) higher
A) lower
A meter that can be installed without the use of a current or potential transformer is known as _____
B) self-contained
It is better to have a substation circuit breaker open and drop an entire circuit, than to have a fuse blow and loose a small number of customers.
False
The Loadbubuster can open load current of up to ______
A) 900 Amps
If a power line worker makes contact with a live conductor while not in contact with any second point of contact, there _____ be a current flow through the body.
B) cannot
The _____ is the unit used to measure the rate of electrical current flow.
A) ampere
If a lamp goes on and off in a continuing cycle, there could be a ballast-to-lamp mismatch.
True
Trees growing near powerlines are a(n) _____ hazard to the public.
A) electrocution
A S-base meter is plugged into a meter base which has been prewired to match the lugs of the meter to be installed. The meter is usually installed with the top incoming lugs_______
C) energized
Thoroughly secure the ladder to an unmovable object, or have it held by another employee.
True
When removing large branches or limbs, you should make an undercut then _____
D) a second cut from the top just past the undercut
Insulators have a number of curves or skirts along their surface. This increases the length of the path that current has to flow to ground. Increasing the size of an insulator increases its resistance and allows it to withstand a higher _____
C) voltage
When AC current flows into a coil, there is additional opposition to current flow caused by inductive reactance.
True
In the line trade, _____ checks are frequently made because an improper voltage is the first indication that something is wrong.
C) voltage
An electrical utility is responsible for large tracts of land, and _____ require property owners to control noxious weeds and erosion.
A) regulatory agencies
All materials are made up of atoms. Each atom has a nucleus, and each nucleus has electrons in orbit around it in the same way the planets orbit the sun.
True
To measure the amount of potential voltage that is available in a circuit, a _____ is used.
B) voltmeter
During storms, energized conductors that are knocked down by tree damage are _____
D) extremely dangerous to the public
Peak demand and/or warm temperatures can cause a long span of transmission to sag an additional _____
C) 10-20 feet
Diversity in a circuit refers to the normal situation in which everyone on the circuit is not using the furnace, air conditioner, appliances, or water pumps at the same time.
True
As with all transformers, the _____ of an instrument transformer must be known and marked on the transformers.
D) polarity
A multiplier equal to the turns ratio of the transformer calculates the actual voltage of the circuit being measured. For example, a 4,800/120V PT has a multiplier of_____
B) 40:1
The highest fault current is near the source of the circuit, such as close to a substation or secondary conductors close to the _____
B) transformer
The single- phase distribution transformer consists of a primary winding and a secondary winding wound in a _____ core.
C) laminated steel
When it rains and water flows on clean insulators, the _____ of the insulator is not reduced substantially.
B) resistance
If the meter installation is protected on the source side by the customer's main switch, _____ the switch before installing or removing the meter.
B) open
A potential meter inside the meter measures the _____ in a service.
A) voltage
A _____ can be installed in series with the primary winding of a distribution transformer to prevent violent transformer failures as a result of an internal fault.
B) current limiting fuse
Powerline workers are exposed to high voltages, safe contact with high voltage circuits can only be made when the resistance between the circuit and a person is high enough to prevent _____
A) current flow
When current flow is in the opposite direction in the primary and secondary terminals, the polarity of the transformers is additive.
True
Overhead conductors are generally bare and insulated from other object by porcelain glass or _____ insulators.
B) polymer
Some sources of renewable energy are _____
B) solar heat, wind, waves and tides
Radiation, measured in millirems, is present _________.
D) everywhere
Sub transmission circuits will serve as a source for _____ substations.
C) distribution
A voltage check with a zero reading between _____ and the neutral will confirm that the service is not fed from another source.
B) L1 & L2
_____ is a current, or flow of electrons.
B) Electricity
In an electronic recloser, temporarily switching the ground trip switch to the block position will prevent a small ground _____ from tripping out the circuit.
B) current
Earth resistance testers or insulation testers are called _____.
C) meggers
One way to ensure that a customer will pay for all the energy use is to meter the apparent energy. A _____ meter is used when a customer is being billed for apparent energy.
A) VAR-hour
A load-break elbow can be pulled from a load bushing with a live-line tool to interrupt a _____ amp load current.
A) 200
An electromechanical meter relies on a _____ being turned in the same way that an electric motor turns an armature.
A) disk
A generating station is a plant in which the energy of coal, oil, natural gas, water, or atom is changed into electrical energy.
True
Pad-mount transformers are safer for the lineman to install and maintain, and they reduce the hazard to the public.
True
The windings of distribution transformers can be manufactured with various taps to broaden the range of _____ suitable for a given installation.
C) primary voltage
Installing the distribution feeder circuits underground near the substations eliminates multiple circuits on the pole lines adjacent to the substations, improving the _____ of the substations and surrounding facilities.
A) appearance
To measure the maximum rate at which electricity was used and can be measured as kW, kVA, kVAR, we use _____.
C) demand metering
Geopressured systems use _____ located deep in deposits of sand and sealed off from the surface of the earth by shale.
D) hot water
Fissioning occurs when a neutron strikes the nucleus of an atom with enough force to _____ the nucleus.
B) split
Mercury-vapor, high-pressure sodium, and fluorescent bulbs should be replaced as a group every _____ years.
D) 5
Most residential and smaller businesses are supplied with a _____ service.
C) single-phase
The function of a distribution _____ is to reduce primary voltage to the voltage level required by the customer.
D) transformer
Before current will flow through a human body, it must enter the body at one contact point and leave the body at another contact point that is at a _______.
A) the same potential
B) a different potential
B) a different potential
The term ground used in electrical work refers to the _____ as the zero potential.
A) earth
The transferring of electrons from one atom to the next is electrical _____. In other words, electrical _____ is the flow of electrons.
A) current
The Electrical systems in the United States and Canada are independent of each other.
False
The risk of an arc is low when load is broken with a hot-line clamp.
False
A socket-connected meter (S-base) is plugged into a meter base that has been pre-wired to match the _____ of the meter to be installed.
A) lugs
Transmission lines can be overhead or underground.
True
The transformer tank is grounded and _____ to the Primary and secondary common neutral ground wire.
D) connected
The capacity of a distribution transformer is determined by the amount of current it can carry continuously at a rated voltage without exceeding the design _____.
C) temperature
Commercial loads are usually serviced by an individual transformer, or a three- phase transformer bank.
True
Inductive reactance, capacitive reactance, and resistance provide the total impedance to _____ in a circuit.
D) current flow
Occupational safety regulations do not allow an unqualified person to come within _____ of a distribution circuit.
C) 10 feet
As the load increases on a circuit, there is an increase in the _____ drop.
A) voltage
All distribution transformer tanks and _____ conductor(s) of all transformer secondary circuits should be grounded to protect to protect life and property.
B) one
_____ in a conductor causes electrical energy to be converted into heat.
C) Resistance
Distribution feeder circuits typically have _____ installed at strategic locations. These can be used for redirecting power flow, load balancing, or sectionalizing.
A) switches
Circuit breakers including _____ and metal-clad breakers can interrupt fault current and lock out on a permanent fault.
D) distribution reclosers
The current that leaves the source must make a complete "circle" and return to the _____.
D) source
Most generating stations in the U.S. and Canada produce _____.
B) AC at 60Hz
In an electronic recloser, the _____ in the control box can open and close the recloser.
A) main operating switch
A transformer is a device constructed of windings used to transfer alternating- current electric power by electromagnetic _____.
B) induction
The conductors for a distribution feeder circuit originate at the terminals of the _____ in a distribution substation.
C) circuit breaker
The overhead primary circuits normally connect to the distribution feeders circuits through _____.
B) fused cutouts
If the distribution transformer has a two-wire (bushing) secondary, either of the two wires can be grounded.
True
In some areas of large cities, it is not practical or permissible to build overhead transmission or distribution circuits. They must be installed underground.
True
The relationship between volts, amps, and ohms is expressed in an equation known as _____.
D) Ohm's law
Resistance is measured with a(n) _____.
D) ohmmeter
The energized installation of a self-contained meter on services more than 240V should be _____.
B) avoided
Nuclear plants do not discharge _____ and particulates into the atmosphere.
C) sulfur dioxide (SO2)
Branch circuits tap to the main distribution feeder circuits through high-voltage fuses commonly known as _____.
D) cutouts
With the source side energized, and the customer's disconnect open, there should be no voltage present between _____.
C) S1 or S2 and L1 & L2
An uncontrollable electrical flash can occur when a socket-based meter is removed _____.
B) under load
One megawatt (MW) =
A) 1000kW
For a residential customer, the minimum charge saves a utility the extra expense of installing _____ to track actual demand.
D) demand meters
A load-interrupter switch is not capable of dropping load and quenching an arc.
False
Utility conservation programs try to _____ by having reduced rate structures during off-peak hours.
B) reduce peak loads
Circuit breakers in substations serving as a source to distribution circuits are actuated by protective relays that recognize _____ on a circuit.
B) short circuits and grounds
The lineman or groundmen should stand directly under a transformer while mounting it to help guide it onto the pole.
False
Generating units driven by internal-combustion diesel engines are usually in remote areas, small towns, and sites requiring standby or _____.
C) emergency power
When the rate of work is at 1 kilowatt and it lasts 1 hour, the quantity of electricity used is measured in _____.
C) Kilowatt-hours
If a streetlight lamp goes out and back on again when it shouldn't and continues this cycle, the bulb is fine and should be kept in service.
False
When a cutout is opened with a switch stick, the cutout is operated like a regular isolating disconnect switch that has _____ capability.
D) no arc-extinguishing
Transmission substations located near generating stations provide a means to change the _____ to the appropriate magnitude to transmit the power the required distance.
A) voltage
Electrical current is measured with a(n) ______
C) ammeter
One kilowatt (kW) =
D) 1000W
The distribution feeder circuits leaving the substation serve as a source to branch or primary circuits and are often referred to as distribution main-feeders or _____ circuits.
B) express feeder
Conductance is the same as resistance.
False
Subtractive polarity is standard for all single-phase transformers 200 kVA and below having high-voltage ratings above _____.
D) 9000 volts
Corrosion problems and the high cost of installation have minimized the use of _____ transformers.
A) submersible
The customer who uses the power 24 hours a day has a _____ load factor and is billed at a lower rate.
C) higher
Switchgear in a(n) _____ system is operated in confined areas where any arc could easily spill over to grounded cabinets or other phases.
C) underground distribution
The lineman can stand on the transformer or other grounded devices to work on the energized circuits.
False
The three kinds of measured electrical power are _____.
C) real, apparent, and reactive power
Wind-propelled turbines are constructed with _____ rotor blades and a horizontal-axis turbine generator.
B) propeller
An internal protective link fuse, commonly installed in self-protected transformers, has an unlimited interrupting rating and can be depended on to prevent catastrophic failure of the transformer.
False
In an AC circuit, the flow of current is impeded by _____ as well as resistance.
D) reactance
A flashlight in good working order shall always be available; if no flashlight is available, matches or a cigarette lighter are acceptable.
False
Industrial or commercial customers frequently have large _____ that the utility must supply.
B) inductive loads
Water will greatly _____ the resistance of any dirty surface.
A) reduce
B) increase
A) reduce
Three single-phase pole-type transformers cannot be cluster-mounted to provide three-phase power.
False
High _____ can stress any insulation and cause it to fail.
A) voltage
Distribution circuits radiate from distribution substations to supply the customer's load.
True
Transformers constructed to reduce the _____ down to the customer's utilization voltage are commonly referred to as distribution transformers.
C) primary voltage
All the properties of an arc can be hazardous including ultraviolet light, molten metal and shrapnel and arc temperatures up to _____.
B) 35,000F/ 20,000C
The bulk of the electric energy produced in the US is generated using what method?
C) Fossil- Fuel
It is _____ for a utility to charge a higher rate to a remote cabin than to a home on a residential street.
B) reasonable
If a streetlight lamp is flickering continuously, it is probably approaching the end of its life and should be replaced.
True
A common voltage, such as 120 volts, is a high enough potential to drive a fatal current through a person's body
True
Single-phase pole or overhead- type transformers can be used to obtain three- phase secondary service.
True
Single primary bushing transformers can be on delta primary systems.
False
The coil- and- core assembly of the distribution transformer is completely immersed in an insulating oil to keep the operating temperatures low and to provide additional insulation for the _____.
A) windings
When an ohmmeter is hooked to two different wires and the meter reads "zero," then there is no resistance between the two wires and they must be completely isolated or insulated from each other.
False
Tap changers on distribution transformers are designed to be operated while the transformer is energized and under full load.
False
The power transformers in the substations change the sub transmission voltage to lower levels and provide a source for the _____ circuits extending short distances to the customer's premises.
C) distribution
Using a kilowatt demand meter and a kilovolt-ampere demand meter is one way to measure _____ during peak demand.
A) power factor
The positive charge of the nucleus and the negative charge of the electrons keep the electrons in orbit and keep the electrical charge of the atom neutral.
True
No apprentice shall work disaster, storm damage, or emergency work until their ___ six months or beyond.
A) 4th
A disconnect switch without a load interrupter is not designed to interrupt any load. It may have a rating of 600 amps, but that refers to the load it can carry _____.
D) continuously
An energized single phase fused disconnect (a cutout) should only be opened with a _____.
D) loadbreak tool
The measurement for instantaneous power by a customer is _____.
B) demand
Steam turbines are fueled by _____.
A) fossil and nuclear
When a switch with a handle is operated by someone standing on the ground, an insulator failure can cause the frame of the switch and structure to become energized.
True
Power transformers can change the transmission system load from one level to another and the transmission load to sub transmission levels.
False
A utility can control voltage, but it cannot control the load current because load current is based on customer demand.
True
When trying to restore power, especially during peak load periods, a fuse or breaker will sometimes trip out even though the cause of the original outage has been fixed. This is known as _____.
D) Cold Load Pickup
If you lived next door to a nuclear power station, you would receive _____ of additional radiation annually.
D) less than 5 millirems
The low-voltage secondary circuit is _____ to guard against an excessive voltage being impressed from an external source.
C) grounded
Catastrophic electrical burns are immediately apparent by visibly blackened skin where _____ the body.
D) contact was made and where current leaves
Voltage is supplied by the customer, and load current is drawn by the power utility.
False
The maximum rate of consumption by a customer during a billing period is known as _____.
B) peak demand
A customer's power factor can be measured as the power factor during peak demand or as the power factor of the _____ used.
D) total energy
After skin resistance breaks down, there will be much less resistance through the internal organs of the body. The internal resistance of a body ranges between _____ ohms.
A) A100-400
When current flow is in the same direction in the primary and secondary terminals, the polarity of the transformer is subtractive.
True
A standard kilowatt-hour meter measures real power, which is equal to _____.
C) volts x amperes x hours x 1000
The nuclear fission process is used to produce _____ in the nuclear reactor.
C) heat
When working on a distribution transformer, the secondary should be completed last to eliminate the danger of _____.
B) back feed
Locating the generation station near major electrical loads _____ and may reduce investment in the transmission and distribution equipment.
D) improves reliability
In most cases, a three-phase transformer is basically three _____ in a single tank.
D) single-phase transformers
Lightning arresters are designed to bypass electrical surges on the circuits, protecting insulators and equipment from overvoltages.
True
The distribution transformer should be installed as near as possible to the center of the load area.
True
An electronic meter measures the _____ and potential going through it without any moving parts.
D) current
Most electric energy is generated at a voltage in a range of _____ volts.
D) 13200 – 24000
Energy consumption is the _____ used by a customer.
A) Volts x Amperes
Intermediate-voltage lines or circuits that transmit AC from transmission substations to distribution substations are called _____ circuits.
B) sub transmission
Commercial and light industrial customers normally require a three- phase service.
True
An electronic sectionalizer is a device that fits into a cutout in the same manner as a fuse chamber.
True
Most voltmeters are rated up to _____ volts.
C) 750
_____ substations are located at generating stations and at switching points in the transmission system.
A) Transmission
Some customers buy power at a transmission, subtransmission, or distribution voltage. The utility uses _____ for revenue metering.
D) primary metering
Branch circuits may be overhead or underground. They are often referred to as _____.
C) primaries
Central generating stations have come into existence because they are _____ and uneconomical for every user of power to generate electricity.
B) inefficient
To ensure that it does not move or slide, the top of a ladder prior to work should be tied
True
All belts and safety straps are supplied by the company and must be a type approvedby the safety department.
True
When climbing or descending a pole, you should support your weight by?
B) Straightening your leg and locking your knee
What are the three most common wood pole species used in the western United States?
A) Southern Yellow Pine, Western Red Cedar, and Douglas Fir
Fire extinguishers shall be located to be easily seen and readily accessible.
True
What rule of thumb will be used to determine the depth of a hole for poles 40 to 85 feet in length?
C) 10%+2’
An incident with a high potential for harm should be investigated to prevent a fatality or injury in the future.
True
If 25 feet of wire weighs 18 LBS, how much does 40 feet of the same wire weigh? (DO NOT ROUND)
C) 28.8 lbs
What is the measure of resistance in a circuit?
D) Ohms
Correct operation of protective devices is dependent on grounding installations.
True
Accidentally energizing a grounded feeder line causes protective relays toinitiate the tripping or opening of circuit breakers on the source end of the line.
True
What is proper method for testing a high voltage line to ensure that it is de-energized?
A) Test the line with a high voltage tester or voltmeter
In a single phase transformer the primary and secondary coils are mounted on _______________ core.
A) a common iron
When setting poles, what is done to prevent contact between the pole and the conductors?
A) Only Insulated cover up is put on the conductors & Insulated cover up is put on the pole
In a circuit containing three 2 ohm resistors in series, the voltage drop across R1 = 20 volts, R2 = 20 volts and R3 = 20 volts. What is the total circuit voltage?
D) 60 volts
When you make a circular motion with your forefinger pointing downward and the forearm vertical, what are you telling the equipment operator?
B) Lower the winch line
How deep should a ground rod be driven to be effective?
B) The ground rod should be driven deep enough to penetrate the perpetually moist earth 8-10 feet in most areas
Given a primary metering installation on a 13,200 / 7,620 volt system with the primary WYE connected to the voltage transformer and a secondary voltage of 120 volts, what is the turn’s ratio of this voltage transformer?
C) 63.5/1
In a circuit with three lamps in series, what will happen if one lamps filament burns out and becomes open?
D) The other lamps will not be lit
Substation disconnect switches are designed to interrupt charging current andfull load current with no modifications or specific designs.
False
Auto boosters can only boost or only buck depending on how they are wired.
True
What is the term for a transformer that contains protective devices such as lightning arrestors, primary fuses and secondary breakers?
D) CSP transformer
How many normally closed contactors, are needed to energize two feed wires for a 240-volt street light circuit?
B) Three
System voltage is 13,200 four-wire Y system and you install a Delta / Delta power bank. Which leg(s) do you ground?
C) One secondary leg only
Why do transmission lines operate at higher voltages?
C) Higher voltages increase the power carrying capacity of the line
Why are batteries used to provide power to operate switches, relays, and other equipment in substations?
A) So power will be available for operations to recover from an emergency
What should be done with metal structures and fences that are constructed under extra high voltage transmission lines?
C) Metal portions should be effectively grounded to bleed off static charges
Employees working in an excavation may not be closer than __________ feet to the excavating equipment while it is in operation.
C) 15 feet
Why are duct runs between manholes installed at a grade that slopes gently toward one or both manholes?
D) It allows water seepage to drain out of the duct
What type of surge arrestor is commonly found on a primary distribution system?
D) Distribution class valve type surge arrester
What are vaults?
A) Large manholes used for transformer and network protector installation
The size of the conductor has no affect the level of fault current at a work location whenworking on a hot secondary circuit should a short circuit occur
False
Rubber blankets are field inspected by rolling the blanket from corner to corner inside and outside looking for damage prior to each use.
True
Multi-conductor cables used for three-phase power circuits consist of three singleconductor cables with a common sheath or jacket.
True
Is a Vaultman or Cableman considered a qualified person?
D) Yes
Identify the following conductor shape
C) Annular
What is a precaution the cable splicer should take prior to beginning a cable splice?
B) Only Must maintain tools in good condition and keep them clean and dry & Maintain clean dry hands, have drawings, and materials on hand
What is the term for the coordination of over current protective devices, which remove temporary faults quickly and limit permanent faults to the smallest section of the system possible?
C) Protective over current coordination or fuse coordination
Identify the following hot line tool by the proper nomenclature.
C) Insulator controller
What is installed in bundled conductor transmission lines to prevent the sub conductors of the same phase from hitting each other and causing damage to the conductors?
B) Conductor spacers
If a ground is mistakenly placed on an energized line, you should quickly removeit to prevent a prolonged outage.
False
A well-grounded electrical system provides a better return path for the faultcurrent to flow back to the source to complete the circuit for the fault current
True
How is vibration fatigue of conductors prevented?
B) Conductors are reinforced at the point of stress and vibration is reduced to negligible amplitudes with damping devices
Identify the following hot line tool by the proper nomenclature.
D) Insulator fork
An approved chain hoist must be used to sag energized distribution conductors.
False
Aerial devices and fiberglass ladders to be used for bare-hand work should be tested each time they are used in the field. How is this done?
D) The device or ladder is raised to contact the energized conductor and a reading of leakage current to ground is made from a meter on the ground
When sagging conductor using the timing method, how far from the support should the rope be placed over the conductor?
D) About 3 feet
What type of fuse link is equipped with pull rings to facilitate replacement with hot sticks?
C) An open primary cutout fuse link
What type of tie should be used on bare copper conductors?
A) Copper tie, bare, soft annealed
What type of fuse consists of a control module and an interrupting module?
D) An electronic fuse
What must you use on a web hoist if going from a structure to an energized conductor?
C) Insulated link
Which of the following statements is true concerning hand ties?
B) Use only annealed tie wire of a size that can be readily handled and provide adequate strength
How often are the insulated aerial booms and baskets, used in live line maintenance, required to be thoroughly cleaned and high voltage tested?
D) Every three months
Identify the following hot line tool by the proper nomenclature.
C) Spiral link stick
Where should a dynamometer be placed?
C) Between the hoist and the conductor grip
When installing a cluster bracket for bonding a wooden pole to a grounded conductor, where must the bracket be placed?
B) Below the feet of the worker
Wood live line tools must be clean, dry and tested before use.
False
A transformer with a partially shorted coil could result in high secondary voltage.
True
Voltage surges from lightning travel in only one direction on a conductor,dependent on the polarity of the lightning bolt.
False
Switching on an electrical system causes transient over voltages.
True
Where would you find the highest available fault current?
A) Near the substation
When inspecting distribution guy wires, the inspector should observe, record, and recommend the following repairs of guy related issues.
D) Slack, broken, damaged, or improperly installed guys
A normally open cable in a padmount transformer can be closed as long as it is of the same phase.
False
There are generally three (3) types of charges a customer can be asked to pay. What are they?
D) Energy charge, capacity (demand) charge, and customer charge
A surge arrestor is a device that allows surge current to go to ground anddissipate and then stops the current flow before it becomes a ground fault.
True
Some characteristics of lightning are?
D) All of the above
Once completed and in service, a riser pole for an underground distribution circuit does not need to be inspected or maintained.
False
Where do arresters need to be placed so they are the most effective?
A) As close as possible to the equipment they are protecting
Never pound with a hammer, or visually inspect a wooden pole before climbing.
False
Underground circuits and cables have their own unique problems, such as:
C) Moisture and corrosion & Cable “dig ins” and insulation failure
The source for Tingle Voltage, a DC voltage is found between the neutral and earth. This is likely caused by ________________.
C) communication circuits or cathodic protection on a nearby pipeline
Which of the following is a protective zone of the transmission protective scheme?
D) All of the above
What type of fuse is the bayonet fuse, which is used, in single-phase underground transformers?
A) Primary
Low voltage can cause ___________.
D) All of the above
What type of arc suppression that is used in substation circuit breakers is the most common?
C) Oil
What is the potential gradient on the ground, per foot, of a lightning discharge within the clouds that never reaches the earth?
A) Up to 3KV per foot
If a transformer is to be parallel with an existing transformer, the secondary circuits must be properly ____________with a voltmeter to be sure they can be connected without causing a short circuit.
B) phased in
Many disconnect switches are three-phase, ______________ switches with operating handles that extend to ground level.
C) gang-operated
Distribution automation gives downstream switchgear the ability to communicate with each other. During a fault on a line, distribution automation switchgear will communicate with each other and will close a feeder and tie switch tp feed back upstream and create another open point to isolate the faulted section.
True
On an A-base meter, a parallel connection would put ____________ across the low-resistance current coil and result in an explosive dead short.
B) voltage
Linemen have been injured by the explosion and oil fire that was a result of closing a fused cutout on a distribution transformer, which has an internal fault.
True
When a circuit is faulted,or short-circuited, all the __________ which the electrical system is able to supply to the faulted location goes to that fault.
A) current
The heat from the current flow will cause damage that can be much more serious than the ______________ might suggest.
A) external injuries
B) internal injuries
A) external injuries
Electric distribution companies have an obligation to provide quality ________ to their customers.
D) power
Fault current due to a short circuit can be extremely high. The resultant flash and heat generated by the fault current can be very dangerous to a worker inthe vicinity.
True
One horsepower (HP) =
C) 746W
A Potential Tester is used to determine if a circuit is energized or isolated.
True
If additional houses are to be served from one transformer, the secondaries canbe extended along the rear lot line.
True
The minimum rating for a power transformer is considered to be _________ kVA.
B) 500
The transformer that supplies 120 volts in a 120/240-volt delta secondary is known as the _________ transformer.
D) lighter
Transformer polarity is indicated on the name plate.
True
What must be done prior to changing the tap settings on a distribution transformer?
B) De-energize the transformer
Which of the following is a wye secondary voltage?
D) 120/208
What does the marking “F2” on a sectionalizer mean?
C) The sectionalizer can be used for switching
What is the phase to ground voltage in a 4160 four wire system?
D) 2400
With a fault occurring as indicated in the diagram below, which device should be the first to isolate the fault?
A) Fuse
Identify the function of a capacitor
A) Added to system to improve power factor
When paralleling single phase transformers for greater capacity, what conditions must be met?
D) All the above
Identify the function of a reclosure
A) Will open and close when a fault is sensed
A 200KVA transformer with a primary voltage rating of 7620v would have _______ polarity.
D) Additive
A transformer name plate has the following ratings: 2400/4160 120/240,. What is the voltage required by the primary winding?
D) 2400
The basic operational principle of transformers is the __________ between primary and secondary windings.
B) Mutual induction
Which of the following is true concerning “polarity?”
B) A comparison of current direction in the primary vs. secondary windings at a given time
230 KV is a common voltage for __________.
D) Transmission Systems
What is the distribution protective scheme designed to protect?
D) The system itself
The polarity of each transformer used in a three phase bank must be the same.
False
A transformer has 20:1 ratio with a secondary voltage of 120v, what is the primary voltage?
B) 2400
Which side of the pole should be used for climbing
A) High side
Before starting work, the circuit and voltage of all conductors shall be identified by theperson-in-charge and the crew.
True
When trimming trees, what should be done with dead branches?
D) All dead branches above the wires should be removed to prevent them from breaking or falling later and causing power interruptions
What should be considered when lifting an overhead transformer with a boom truck?
D) All of the above
When operating a boom truck, what should be done before raising the boom?
A) Look up and all around to ensure there are no obstructions
What factor depends on voltage of the line when selecting porcelain suspension insulators for a 44 KV line?
A) The number of porcelain disks to use in the string
The extinguishing powder that is used in fire extinguishers that have an ABC rating can become conductive in some situations.
True
Which of the following statements is true?
A) Both Solar cells work independently from turbine generators & Solar cells operate due to an imbalance of free electrons between the front and back Surfaces
All trucks and vehicles shall be kept in orderly condition with ___________________________.
D) All of the above
If a pole is found to be unsafe or there is any concern for any reason, what must be done to the pole before climbing and stripping conductors?
A) Securely guyed four ways
What types of connectors are normally used on a #4 aluminum, triplex loop at the residential customer's service entrance?
A) Insu-link or insulated compression sleeve
You have a 500 foot reel of wire that has been used for three jobs. The first job used 89 feet of wire, the second job used 158 feet, and the third job used 222 feet. A forth job requires 56 feet of wire, will there be enough wire remaining to do this job?
A) No
B) Yes
A) No
How are conductors grounded as they are being pulled in?
A) Both Traveling grounds are used at the tensioning and puller sites & Travelers with conductive neoprene linings permit grounding the conductor at each structure
If anchors are not secured and tested, there could be a sudden release of the anchor which could cause an accident or the anchor could slowly settle and cause the conductors to lose the proper sag.
True
All employees have the ability to stop any work involving company employees, ifthey feel that an unsafe work practice or condition exists.
True
When pulling in line conductor through travelers, what is used to attach the pulling line to the conductor?
D) A Kellum grip
The polarity of a single phase transformer can be:
C) Additive or Subtractive
How are conductors classified?
C) As either solid or stranded
What is generated by the flow of current through a conductor?
C) Heat
What are magnetic lines of force called?
B) Flux lines
The magnitude of electric fields at ground level under all overhead transmission lines is ________.
D) very low
Which of the following is true about distribution transformer system voltages taps?
A) Taps connected to the primary winding to broaden the range of system voltages suitable for installation
In a normally closed contactor, when will the contacts be closed?
C) When it is de-energized
What piece of equipment is basically a transformer in nature used to improve voltage at or near the end of a primary distribution line?
C) Auto booster
An “ATO” is strictly for overhead applications and cannot be used in an underground system due to capacitive charges that build up on underground cable.
False
What is the purpose of a lightning arrester in a distribution circuit?
C) To bypass electrical surges on the circuits, protecting the insulators and equipment from over voltages
The purpose of a voltage regulator is to maintain a constant voltage on analternating current primary distribution circuit with variations in load.
True
Why is there no “theoretical” potential between a phase and ground on a delta system?
D) All of the above
Single-phase transformers generally have additive polarity if they meet which of the following conditions?
C) Smaller than 200 KVA and operate at a voltage less than 8,660
What does the use of supervisory control equipment permit?
C) Allows remote control of a substation from a system control center
Another term to describe aerial spacer cable is:
B) Tree wire
You are given the job of installing armor rod on a tangent structure at the point of conductor attachment on an energized distribution line. Which of the following is the first step?
D) Remove the conductor from the insulator with a wire tong, holding stick, necessary hotline tools, and saddles
What is a template used for in transmission anchor construction?
A) A template is used to ensure the anchors are constructed to the dimensions that will line up with the lower portion of the tower
What is used to spread irregular electric fields uniformly throughout the insulation on underground cables to protect the insulation from concentrated electrical stresses around the conductor?
A) Strand shield
Which of the following is a cause of electrical or radio interference?
C) Loose connections, defective insulators, or inadequate clearance between high voltage and ground conductors
What underground voltage condition applies to energized equipment known to be above 15,000 volts and not exceeding 44,000 volts phase to phase that do not fall under other voltage conditions?
B) Condition C
Tracer wire shall be installed on all:
D) All the above
In pipe type cable construction, underground cable is pulled in to a pipe, which is filled with oil
that is continually circulated through the pipe. What is the purpose of the oil?
B) Only: Maintains high dielectric strength between the cable and the ground & Provides a cooling medium for the cable
What device if installed at strategic points in an underground system will aid in identifying faults or trouble locations?
B) Fault indicators
Why must minimum and maximum fault-current be considered in selecting a fuse for a particular circuit?
D) All of the above
What is used to dead end a double circuit primary line when using vertical construction techniques?
B) A yoke plate, fiberglass strain insulators, and polymer insulators
What does a two-pole strain carrier for replacing a single string of dead end insulators consist of?
A) Two insulated poles, a forward yoke, and a back yoke
What is the term used to describe the section of line that is used to sag a particular line?
C) The control span
Lineman wearing conductive suits when working on extra-high-voltage lines are ______ to the shielding.
D) bonded
When the load on each phase is identical, the instananeous power output of thethree phases added together is constant.
True
When joining copper and aluminum conductors together the copper conductor should always be placed above the aluminum conductor to prevent aluminum salts from washing down onto the copper conductor.
False
How are wire tongs jaws opened and closed?
D) By rotating the pole while the jaws are in contact with the conductor
What must a clearance holder ensure is done prior to returning a clearance
D) All of the above
Why is it important to replace a blown fuse with the same type link or one that is called for in the fusing schedule?
A) Failure to do so would result in miss-coordination with other protective devices, cause needless electric outages, and damage equipment
An aluminum compression tap connector (side by side) can be used to make non-tension taps to primary or secondary conductors with all combinations of aluminum to aluminum or aluminum to copper conductors.
True
When hot sticking a double hot tie on a single insulator, how many tails will you be tying in?
C) Four
When one phase of a three phase circuit reaches a peak voltage, another phase is close to zero volt and the third phase is on the return flow.
Verify this answer. No answer on KEY!!!!
True
What is the minimum distance between phases when dead-ending conductors on vertical construction to allow an aerial bucket to pass through the conductors when pole height is restricted?
B) 48 inches
What components make up line protection on a 4 KV feeder system?
A) Substation circuit breakers
Which system allows control room personnel to monitor, and perform remote switching and isolating operations?
B) Supervisory controlled and data acquisition (SCADA)
When a clamp top insulator is used, what is needed at the point of attachment?
A) Conductor and armor rod
What system voltage feeds a typical Denver area 4 KV substation?
A) 13,200
Lighting is the most frequent cause of _____________ and one of the most transient faults on an electrical system.
D) over voltage
Identify the following Auto Cad symbol.
D) A capacitor
In a voltage regulator both the primary and secondary windings are connected in parallel with the line.
False
What is the purpose of a schematic diagram?
D) All of the above
The resistance of a fault affects the amount of fault current that can flow through a circuit.
True
A step-down transmission substation is also a switching station where lines from different parts of the grid come together.
True
Why is the neutral mounted above the conductors on static neutral or vertical construction?
C) It provides protection from lightning for the phase conductors
What is the Sparkover effect of a voltage surge?
C) A disruptive discharge through the air
Submersible transformers are inexpensive to install and maintain, this makes them more widely used than pad mount transformers.
False
Most of the underground distribution circuits tapping the main circuits are what?
A) Single phase loops
The substation yard is a zone of equipotential due to the fact that everything is tied to the grounding grid within the station.
True
When electrical equipment is connected to a system ground, what happens to a voltage surge?
B) A voltage surge would be kept to a lower level and dissipates quicker
Of the air-insulated and the gas-insulated substations, which is the most common?
A) Air-insulated substation
B) Gas-Insulated substation
A) Air-insulated substation
Oil with no moisture content would be a __________________.
A) insulator
A recloser will provide protection for any circuit that has the capacity downstream to generate the needed fault current to trip it.
True
When operating pole mounted switches, what should they be inspected for each time they are operated?
D) All of the above
The high-voltage tap changer is designed for de-energized operation only.
True
How are high voltage conditions detrimental to the operation of electrical equipment?
B) Shortens the life span of heating elements, light bulbs, and electron tubes
Large hydraulic reclosers have a low- voltage supply to an electric motor, thisallows the heavy contacts to be operated quickly.
True
Pad- mount transformers are safer for the lineman to install and maintain, andthey reduce the hazard to the public.
True
Insulators are cleaned using high-pressure water, corn cob, and nutshell blasting to mechanically _____________ from the insulators.
D) remove grime
Metal-clad breakers are commonly operated by _____________.
B) remote control
Unless a primary loop is excessively long, it can be operated by an ordinary
C) disconnect switch or hot-line clamp
Electrical current will not flow unless it is in a circuit.
True
If the body is not touching a second point of contact, there can be no _________ flow through it.
A) current
If the regulatory tap setting on a single phase transformer is changed from tap C (100%) to tap D (97.5 %), what happens to the secondary voltage?
B) It will increase
During a Job briefing, the person in charge will ensure which of the following?
D) Encourage questions, comments, and suggestions during the briefing
When hauling poles, how should the overhang off the back of the trailer be marked?
D) All of the above
Transmission lines usually terminate in voltage changing stations normally called what
B) Substations
Symptoms of heat stress include:
D) All of the above
Helix anchors have one or more helix disks attached to the anchor rod. What is the purpose of additional helix disks on the same anchor rod?
A) Each helix disk acts essentially as a separate anchor for increased holding power
Which of the following can be done from an aerial platform that shall not be done from an insulated bucket?
D) Transfer from the aerial platform to a pole or tower
Hardware on wood transmission structures operating above 230KV is bonded above the top of the X brace. Why is this bonding done?
C) To eliminate air gaps where arcing might develop and cause fires
What is the maximum service drop span length (pole to house) for #2 triplex without a lift pole?
C) 100 feet
In order to prevent the line worker from being accidentally pulled off of the pole while climbing if it is snagged by a passing vehicle or by equipment used at the job site, the handline should be:
D) Carried on a breakaway hook
When pole holes are dug and the pole cannot be set for whatever reason, the hole must be ____________ if left over night.
B) covered by a plank, dirt, and barricaded
What law states, “It takes one volt to push one amp through one ohm?”
A) Ohm’s Law
Why it is important to install a jumper across a current carrying conductor prior to cutting it open?
D) All the above
When working a de-energized primary line, it must be grounded and short-circuited at the work location and remain so until the work is complete if practical. If it is not practical protective grounds may be placed downstream of the source.
False
On an electrical system, the most available fault current will be:
B) Near the source of the circuit such as a substation or a transformer for secondary
Where are framing and equipment put on a wooden pole to take advantage of the natural strength of the wood?
B) The face of the pole
Why has copper been widely used as line conductors in the past
D) All of the above
Why would underground cables not need to be grounded prior to working on them de-energized?
D) None of the above
When the term voltage drop is used, it is generally in reference to:
D) The difference in voltage between the source and the customer due to load
Why is it dangerous to open a neutral or ground wire on an energized circuit?
B) Both: It is a current caring conductor & It will develop a static charge that could cause injury
Once the line has been de-energized and tested, what tools and equipment are required to establish an equal-potential work zone on a wooden pole?
A) Ground jumpers, a shotgun, hand tools, and a Cluster bar or block
Why are switches installed in distribution feeder circuits?
A) Only To redirect power flows for load balancing & To sectionalize or isolate a section for repairs
What does the term “ATO” stand for?
C) Automatic throw-over
Converter stations are used to convert AC transmission voltages to DC, andvise-versa
True
The need for a neutral is minor when the load is balanced among the three phases. For this reason, the neutral is often omitted in distribution and transmission wye circuits.
True
A 25 KVA transformer has a ratio of 27.5 to 1. If the primary voltage is 13,200, what is the rating of the secondary in KVA?
B) 25
Oil filled sectionalizers marked F-3 can be opened under load.
False
What is the most likely cause for a streetlight burning during daylight hours?
D) The photocell has failed
Which type of contactor is normally closed
A) BB
The ground strap on a common single-phase pad mount distribution transformeris connected to one end of the primary coil.
True
A sectionalizer is found tripped. You patrolled the lines find nothing wrong and call dispatch for permission to close it back in. How do you close the sectionalizer back in?
C) Push up on the yellow ring with a hot line tool
When will qualified personnel wear rubber gloves while engaged in energized underground distribution work?
B) At all times
What is normally used to splice cables on underground distribution systems that are direct buried?
C) A prefabricated cable splice kit is used to splice the cable
Which of the following methods for assembling lattice steel towers is used when towers are large and heavy and the ground is rough?
C) Piece by piece method: tower is assembled one piece at a time from the ground up
What is normally used to terminate cables with solid dielectric insulation?
D) Molded rubber terminators
When untying energized conductors with hot tie sticks, you should cut the tie as close as possible to eliminate the possibility of making contact with a different potential?
True
What does the level of fault current at a work location depend on when working on a hot secondary circuit?
D) Only: The distance from the work location to the transformer & The conductor size
Why are secondary cables for underground installations generally larger than those for overhead applications?
C) Because of reduced capacity of the cable due to temperature limitations of the cable insulation
Given a nine duct conduit run that is completely empty and four power cables, a lineman should install the cables in the middle ducts to protect the cables by reducing heat radiation.
False
What must be done to ensure that a mechanical jumper is carrying enough of the load to safely cut the conductor that is jumpered out?
D) An amp check must be performed to ensure that the mechanical jumper is carrying at least 30% of the load
When working on a 4 KV system extra caution needs to be observed due to itsage, type of construction, and protection system.
True
Personnel protective grounds need to be large enough to carry fault current forenough time to trip out the circuit.
True
When making compressions on a distribution compression sleeve, how should the presses be made?
D) Start near the center, work toward one end and then repeat the process from near the center toward the other end of the sleeve
What is the purpose of inhibitor compound in conductor splices?
B) Seals the contact area during termination preventing performance degrading oxidation and corrosion
When installing an automatic splice, how are the teeth set into the conductor?
A) Jerking the conductor several times sets the
On a grounded circuit, the rules for a parallel circuit apply.
True
Automatic splices should not be installed within _______ inches of tie wires or armor rod.
A) 12
What type of tag will you hang on the recloser after you set it to one shot, prior to doing some hot stick work down the line to replace broken insulators?
C) Hot line hold or live line work tag
What type of circuit develops a voltage drop?
B) All circuits dependent on the impedance of the circuit
When working on energized equipment, why is the second point of contact is considered a hazard?
C) Both: It allows current to flow & Would be in series with the circuit
Identify the following hot line tool by the proper nomenclature.
C) Wire tong clamp
A ___________________ is installed on the output of the regulator. It sends a representative voltage to the control box.
A) potential transformer
Which hotline tool can be described as a slender insulated pole provided with a hook clamp on one end and a swivel on the other end and is primarily used in holding live conductors?
C) A wire tong
What device is used to dead end #2 ACSR bare primary conductor?
C) A dead end shoe
Grounding an electrical system limits the rise in potential on the neutral, metalstructures and noncurrent-carrying electrical equipment.
True
Identify the following hot line tool by the proper nomenclature.
C) Rotary prong
Transmission and distribution lines where experience indicates conductors have prolonged periods of vibration should have _______ installed to prevent fatigue failure of the conductor.
B) vibration dampers
A short circuit is when the _____________ between an energized conductor and another element that are in contact with each becomes low enough.
C) impedance
A clearance tag is used to inform another person approaching the job that youare rubber gloving energized conductors downstream of that particular device.
False
Aerial patrols are often initiated if a transmission line has an unscheduled outage to locate problems such as _________.
D) All of the above
Electrically connecting the neutrals of every wye connected transformer and generator to earth is known as what?
B) System grounding a power system
What happens to the voltage on a phase conductor and the neutral if a voltage surge is great enough to have a coupling effect between the two?
D) Voltage on the phase is reduced and voltage on the neutral is increased
Substation circuit breakers automatically provide opening and closing under faultconditions.
True
When a lineman or patrolman is looking for trouble on a line they should alwaysobtain a clearance prior to their patrol.
False
How many control spans should be used in a sag section consisting of seven spans?
D) Two
Some customers own a UPS system which is a backup power supply to keep them from experiencing even momentary outages. What does UPS stand for?
A) Uninterrupted power supply
If you saw the following drawing on an electrical print, how would you identify it?
C) As an oil circuit breaker
What precautions must be taken before returning a clearance?
D) All the above
How often is a shield wire grounded?
C) At each structure
Fault current does not need a complete circuit to flow.
False
In a balanced three phase circuit, where does the return current flow?
D) Phase conductors
What are the three (3) kinds of loads fed by an AC Circuit?
B) Resistive, inductive, and capacitive
The Nx switchblade is a(n) __________________device that is available as a current- limiting fuse or a solid-blade device.
D) arc-suppressing loadbreak
Three-pole, group operated switches provide a means for lineman tosectionalize or connect the feeders to other circuits.
True
A watt is the basic unit of power, but it is very small. In the electrical utility business, ________________ are the most common units.
B) kilowatts (kW) and megawatts (MW)
The voltage should be measured when the transformer is energized, to ensure that the connections are correct before the ________ is connected to the transformer.
D) load
Transformers must be constructed with the proper ___________ for the system primary voltage and the desired secondary voltage.
B) windings
A sub circuit breaker is not designed to protect a substation and sub-transformer from overloads
False
Time-over current is the type of fuse used in the Company system
True
Newer electronic equipment is less sensitive to the voltage provided by thepower supply.
False
Electrical power is the product of volt and amps and is measured in watts. Choose the correct equation.
D) W = EI
Which of the following are true when the bayonet fuse on an underground single-phase transformer is removed?
D) Both secondary and primary transformer windings will be de-energized
On a long line that is lightly loaded, capacitive charging current may exceed the load current and result in the receiving end voltage being greater than the sending end voltage.
True
What type of charge (if any) can remain in a cable after it has been de-energized
C) Capacitive
What does the following Auto Cad symbol indicate?
D) 200 Amp switch cabinet dead front
Resistance is the largest component of total impedance to current flow in a circuit.
True
Identify the following Auto Cad symbol.
A) Man hole
Fuses are chosen for a specific location dependent on what attributes?
B) Both Size of the fuse & Its Speed Rating
In a distribution system, protective equipment is placed sat strategic locations to limit and isolate faults so the remainder of the system is not affected.
True
What do the letters “NO” mean when seen next to a switch on a one line drawing?
B) The switch is normally open
Identify the following Auto Cad symbol.
C) Booster / regulator bank
How should lineman’s pliers be used to complete a hand tie?
D) To cut off the excess tie wire only
Why is it important to the customer to have the proper phasing sequence?
A) So motors run in the right direction
What type of conductor is typically used in 4 KV circuits?
A) Copper
The conductor must be wire brushed prior to installing grounds to help ensure a low resistance connection.
True
When a fault occurs downstream of a fuse, sectionalizer, and a recloser, what happens?
B) The recloser will function once the sectionalizer will count once and if the fault is still there the fuse will blow
Careful attention must be paid to the temperature at the time of sagging conductors as the sag varies considerably with temperature.
True
When using the stopwatch method of sagging line conductors, why is a rope thrown over the conductor to be sagged?
D) It is used to instigate a mechanical wave and feel the number of returns
Compression stirrup connectors are pressed onto a primary line to provide an attachment point for a hotline clamp. Why is this done?
A) To prevent the hotline clamp from damaging the primary line conductor
Conductors that are strung in to high tension are subject to aeolian (caused bywind) vibration.
True
What method is used to sag conductors that have unusually small sags?
C) Dynamometer method
It is a common practice to leave conductors untied for several hours before final measurement and tying in.
True
When hand tying solid copper line wire, what are the turns for a top tie when using copper wire?
D) 2-6
What is provided for cables operating at more than five KV to ground and is recommended for cables operating above two KV to ground?
C) Insulation shielding
When inspecting a rubber line hose you should roll it inside out and look for:
D) All the above
When hot line work or live line work is to be done what should be done to the source circuit breaker or the recloser?
A) Only The automatic reclosing feature should be blocked & The automatic reclosing feature should be tagged
What is the term for circuits that carry power from distribution substations to local load areas?
D) Express feeders, distribution main feeders, or primary circuits
When preparing a cable for splicing, it is critical that all traces of __________ be removed from the insulation back to within the approximately 1⁄4 inch of the metallic shield.
D) semi-conducting material
Which of the following is a reason for installing an underground system?
D) All of the above
What conditions for an excavation will identify the need for shoring, or providing the angle of repose to be sloped or benched to the correct angle as indicated on the excavation checklist?
A) The excavation is five feet or greater in depth or a competent person deems the excavation hazardous
Duct runs are used to support cables along the wall of a manhole and maintainseparation between different cables.
False
What are the terms for large over voltages that develop suddenly on electric transmission and distribution circuits caused by switching operations or lightning?
A) Surges or transients
What type of system carries large blocks of electrical energy over relatively long distances?
A) A transmission system
In a series street light circuit, what is the purpose of the red wire connected to the LSC?
A) It goes to the load
What must be done to the secondary circuits if a new transformer is to be connected in parallel with an existing transformer?
B) Phased in with a voltmeter
An auto booster with a 10/1 ratio (boosting) is on a line where the source voltage measures 6,927 volts. The sliding contact is on tap 5 of the secondary coil. What is the corrected voltage on the load side of the auto booster?
B) 7,620
What is the best rubber cover up component to use to cover up odd shaped conductors and equipment?
C) A rubber-insulating blanket
What is the most important article of protection for a lineman or cableman?
C) A good pair of rubber gloves with proper dielectric strength
What must be done before connecting a customer’s service to a newly installed transformer?
D) All of the above
How does a capacitor bank correct the power factor in an area with a large inductive load?
C) It stores a charge and returns it to the line creating capacitive reactance that aid in correcting the power factor
What does a yellow dot on the outside of a secondary pedestal indicate?
A) The pedestal feeds a streetlight
What device is used to check for a bad cell in a de-energized capacitor rack?
B) C-meter or microfarads meter
The energy input into a transformer is equal to _______________.
C) the energy output
What type of energy does a photovoltaic cell convert into electrical energy?
B) Light
What happens to the voltage in a neutral if there is a poor electrical connection?
C) Both The voltage decreases & The voltage increases
The following circuit has four 100-watt bulbs. What will happen if L2 is replaced with a 60-watt bulb?
C) The total circuit current will decrease
What causes a magnetic field to develop around a conductor?
B) The current flowing through the conductor
Which of the following must be effectively grounded?
A) All equipment cases and tanks
Who mandates first aid training requirements for company employees?
B) Occupational Safety and Health Administration
What is the term used to identify the low-voltage wires that run from the distribution transformer low-voltage terminals to the terminal point of the customer’s service connection at a pole or pedestal?
D) Secondary mains or secondaries
What is the purpose of the static wires on a transmission line?
D) Shields the line conductors from lightning
While sagging a service loop, if the tails are long enough to make contact with theprimary, you would be considered in the danger zone.
True
What must be considered while operating a hand line?
A) Care must be taken to keep hands and feet clear of sheaves and loops
Why are impact tools, such as chisels, wedges, or drift pins unsafe if they have mushroomed heads?
C) The head might shatter on impact sending sharp fragments flying
The frames of motor vehicles equipped with booms or aerial baskets will be grounded with approved grounding equipment when working in the vicinity of energized lines or equipment.
True
Cover-up is available only up to what voltage?
A) 69 KV
What is the method used to create an anchor hole in rock?
A) Drill steel and pneumatic hammer drill
If climbers are sharpened properly, what is the maximum distance that they will cut back into the pole and hold during the cut out or plain test?
D) Two inches
The tic tracer and the wiggie are the only tools authorized to be stored with rubber gloves in the same bag.
False
When setting poles, where is the winch line attached to the pole?
D) Slightly above balance so the butt end outweighs the top end slightly
Of the poles listed, which is the largest?
A) Class 1
What is a multi-grounded common neutral conductor?
D) A neutral conductor that is effectively grounded throughout its length
Where potential eye hazards require the use of goggles, face shields, helmets or hoods for adequate protection, safety glasses with side shields can be substituted for the required equipment.
A) Totally true
B) Absolutely false
B) Absolutely false
Why is a body harness worn while climbing steel transmission structures?
A) To facilitate rescue
What precautions should be taken prior to digging a pole hole next to an overhead line
D) All of the above
How is the bucket lowered when performing a bucket truck rescue?
B) Use ground controls on the truck
How many parallel strings of porcelain or glass insulators can a single Hi-Lite suspension insulator replace?
D) Four
Which of the following materials is the best conductor?
D) Copper
The skirts or sheds of an insulator create a longer tracking distance and therefore a higher BIL
True
In what direction is the face of the pole when it is used as a dead-end or corner pole?
A) Toward the anchor
Three typical materials that are used to make electrical insulators are:
D) Porcelain, Glass, Polymeric
If source voltage = 15v, R1 = 3000 ohms, R2 = 500 ohms, and R3 = 1000 ohms, what is total circuit current?
A) .05 Amp
What can a qualified person do, when necessary for protection of life or property?
C) De-energize lines and equipment with approval
You have a proper job briefing, go to work, and then the plan changes. What actions should happen next?
D) Person in charge calls the crew together and properly explains the changes in the plan with a new job briefing
What is the term used to describe a stranded aluminum conductor that is reinforced with one or more strands of steel?
B) ACSR
Which of the following is considered to be an electromagnetic device?
D) All of the above
A 20 KVA transformer has a ratio of 55 to 1. If the primary voltage is 13,200, what is the voltage at the secondary?
C) 240 volts
What is the purpose of a sectionalizer?
C) Isolates faults and protects the feeder and distributor
What do voltage or potential devices connected to coupling capacitors normally provide power to?
A) Protective relays
What does the term LSC stand for?
A) Light sensitive control
What is the maximum use voltage for class 2 rubber gloves?
B) 17, 000 volts ac rms
Current and potential transformers supply the intelligence for measuring power flows and the electrical inputs for the operation of protective relays associated with the transmission and distribution circuits.
True
What does the L shaped lever on a hydraulic recloser do?
A) Sets recloser for non-reclosing or normal mode
Which of the following statements is true concerning a WYE / Delta Bank with the center can center tapped to provide single-phase loads?
C) The lighter can caries 2/3 of the single-phase load and the two power pots the other 1/3 of the single phase load
Why are direct current transmission systems used?
C) To interconnect two AC systems which are not synchronized
What are the two types of capacitor banks?
C) Fixed and switched
On a current transformer, what happens to the voltage when the current is stepped down?
C) The voltage increases at the same ratio
What is the following conductor shape?
C) Concentric round
What must be installed on the unused load break bushings in pad-mounted transformers and connected separately to the ground bus with a hot line clamp?
D) An elbow arrester
To eliminate high voltage at the secondary terminals, what should be done prior to removing the load from an energized CT?
C) The secondary terminals should be shorted out
Harmonics can increase power losses significantly in distribution circuits, causing majorincrease in unaccounted for energy and operating costs.
True
Additional conductors shall not be pulled into a duct already occupied by an energized conductor.
True
What is considered in the design and construction of conductors, insulation, sheath, jacket, and shielding for underground cable installation and operation?
C) Mechanical, thermal, environmental, and electric stresses
When using a hydraulic powered compression tool to compress a tensionsleeve, the dies should never overlap previous die compressions.
False
Which of the following tools can be used in a hot stick application to temporarily attach a conductor to a hoist to relieve strain on a dead end insulator string?
C) Come along or slip on grip
What device is required to be installed at conductor points of attachment, for extra and ultra-high voltage transmission lines?
B) Corona shields
How often are the insulated aerial booms and baskets, used in live line maintenance, required to be thoroughly cleaned and high voltage tested?
A) Every three months
When sagging conductors using the stopwatch method, when do you start the stopwatch?
A) At the jerk of the rope
Which of the following best describes the “Danger Zone?”
D) The area within reaching or falling distance of any conductors, with a potential of 277 volts to ground or above
Identify the following hot line tool by the proper nomenclature.
C) Armor rod applicator / ring stick
To ensure that a person will not be exposed to any hazardous current or voltage after the protective grounds are installed, one must refer to the ______________ which will control the current around the worker.
C) Grounding Principle
When securing a conductor to an insulator, what is the function of the tie wire?
D) The tie wire holds the conductor in place on the insulator
When replacing a watt-hour meter, which of the following should be done?
C) The customer should be informed prior to changing the meter if possible
One of the three factors for ferroresonance to occur is the inductive load and the capacitive load must be in series with each other.
True
What type of fuse can be used in series with an expulsion fuse to prevent catastrophic failure of a distribution transformer as a result of a high current arc formed under the oil?
C) A partial range current limiting fuse
Which of the following statements is true concerning armor rod?
B) Armor rods reduce vibration and protect the conductor against chafing and flashover at the point of support
What device records and stores voltage and temperature data for capacitor banks in the event of a system disturbance or fault for later retrieval with a lap top computer or a telecommunications link?
B) An event recorder
Capacitors control voltage by supplying lagging current to a distribution line to
counteract the leading current, which the line must supply to magnetize motors,
transformers, and other magnetic equipment.
False
________________ is used if a major element in a distribution substation fails and there is no possible way to feed it from a different bank or back feed it from a different substation.
D) A mobile substation
A fault may be a dead short or a partial short depending on the impedance between the energized conductor and the object causing the short.
True
Linemen should periodically inspect the routes of underground electric cables, for obstacles that could damage the cables. Which of the following are things that the lineman should look for?
D) Changes in grade or washouts that might expose or damage the cable
Pad-mount transformers are used more extensively than other types ofunderground transformers.
True
What can be used to locate hot spots caused by loose connections, hardware, or other defects on a line?
A) Thermo-vision or infrared scanning technology
What causes electrochemical treeing in cables with solid dielectric insulation?
D) Water in the conductor that penetrates the insulation
Identify the following Auto Cad symbol.
C) Wire Type Change
When inspecting distribution pole-top assemblies, the inspector should observe, record, and recommend the following repairs of pole- top issues.
D) Both Broken skirt of pin type insulators & Broken, burned, or damaged pins/ or cross arm requiring replacement
Which of the following disturbances can affect power quality?
D) All of the above
When inspecting distribution equipment installations, the inspector should observe, record, and recommend repairs for the following equipment issues.