Third Step "B,C,D,E"

Why is there is no “theoretical” potential between a phase and ground on a delta system?

A) Phase to ground does not complete a delta circuit
B) There is no reference point between ground and any phase
C) The return flow to the source is in the opposing phase conductors
D) All of the above

When changing out a transformer that is paralleled with another transformer, what
needs to be done before disconnecting the primary connection with a shotgun or switch
stick?

A) Secondary phase conductors must be disconnected from the transformer
B) Secondary phase conductors must be grounded
C) All wires on the secondary side must be disconnected from the transformer
D) Open the secondary breaker and remove neutral / ground connections

When using a voltmeter to perform phasing on two known energized secondary
circuits, what does a “0.00” reading indicate?

A) The meter has a dead battery
B) The circuits are de-energized
C) The two circuits being tested are the same phase
D) The two circuits being tested are out of phase

What does the use of supervisory control equipment permit?

A) Allows remote control of a substation from the control room of the nearest power plant by the shift supervisor
B) Allows several substations in a region to be remotely controlled from a large substation by the station supervisor
C) Allows remote control of a substation from a system control center
D) Allows only the substation supervisor to control the substation either remotely of locally

Which of the following is true of a transformer nameplate listing one secondary voltage
of 277 volts?

A) The Transformer secondary internal coils are wired in series
B) The transformer is not to be used in three phase banks
C) The transformer has three secondary bushings
D) The transformer has only one secondary coil

Why is oil used in transformers?

A) To lubricate the laminated plates in the core reducing hysteresis and eddy current losses
B) To cool the core and coil assemblies
C) Both To cool the core and coil assemblies & Transformer oil has high dielectric strength and adds to the insulation value of the transformer
D) Transformer oil has high dielectric strength and adds to the insulation value of the transformer

How is an insulator hood properly installed?

A) It will snap into place below the cross arm
B) It will snap into place around the insulator leaving a perfect   inch gap between the hood and the line hose to eliminate tracking
C) It will snap into place around the insulator leaving a perfect   inch gap between the hood and the line hose to eliminate tracking
D) It will overlap the line hose when properly installed

What is the function of a turbine in an electric generation plant?

A) It converts steam energy to electricity with the use of magnetic fields
B) It converts heat energy from a fuel into electricity
C) It converts steam energy into DC current for the stator windings
D) It converts steam energy to mechanical energy that turns a generator

There are four basic types of switched capacitor banks. Which of the following are switched capacitor banks?

A) Voltage, current, VAR, and Temperature
B) Thermal, SCADA, electrical, and chemical
C) Underground, overhead, DC, and AC
D) Digital, analog, time/current, and VAR

Which piece of special equipment uses a bandwidth relay and a time delay relay to limit hunting or over operation of its components?

A) A capacitor bank
B) A step voltage regulator
C) A sectionalizer
D) A recloser

What street light circuit requires the use of a pilot wire?

A) High altitude street light circuits
B) A series streetlight or multiple light circuits
C) A cascade control lighting circuit
D) A modern street light circuit

What does the hipot adaptor for phasing sticks allow you to do?

A) It applies an AC voltage on the cable to test them before they are energized
B) It allows you to test cable on high voltages
C) It allows you to test the insulating level of the cable
D) It applies a DC voltage on the cable to test them before they are energized

Why are batteries used to provide power to operate switches, relays, and other equipment in substations?

A) Batteries are easy to use at remote installations where power is not required
B) It is a cheaper, although less reliable source of power
C) So power will be available for operations to recover from an emergency
D) Batteries produce a clean constant supply of 120V AC power for efficient switch and equipment operation

Which situation will cause a substation breaker to operate automatically?

A) A drop in frequency
B) Low voltage
C) Over currents
D) All the above

On a primary meter installation, how is the current transformer wired?

A) It is wired in series with the load
B) Delta / delta connected
C) Delta / WYE connected
D) It is wired in parallel with the load

What type transformer is used in a series street lighting circuit?

A) Low resistance
B) Constant current
C) Light sensitive controlled transformer
D) Variable wattage

What does an arrestor do?

A) It is an insulated device that limits over voltages on the primary system by absorbing harmful voltages
B) It is a series of resistors and diodes that eliminate eddy and harmonic currents and improve the power factor
C) It is a large spark gap that provides a low resistance path to ground for voltage surges caused by lightening or switching to protect equipment
D) All of the above

What would cause an ATO to switch from the preferred feed to the alternate feed?

A) A power interruption on the alternate feed for a preset amount of time
B) A secondary fault on the customer’s equipment
C) A power interruption on the preferred feed for a preset amount of time
D) Both B. and C

A common single-phase pad mount distribution transformer has two primary bushings on it. Which of the following is true concerning these bushings?

A) Removing the primary bayonet fuse de-energizes the primary coil between the two primary bushings
B) The bushings are on opposite ends of the primary coil
C) The bushings are both at one end of the primary coil
D) Removing the bayonet fuse will de-energize both bushings

What rating is required for oil filled sectionalizer to be opened under load?

A) Sectionalizers are not rated to be opened under load
B) It must have an F-2 rating
C) It must be rated for cold load pick up
D) It must have a F-3 rated time over current fuse

What is the primary purpose of fuse coordination?

A) To ensure fuses will blow in series
B) To plan out our system so the least number of customers will be affected by any one outage
C) To match fuses to component load capacity
D) To ensure fuses blow before fault current damages expensive equipment like reclosers and substation breakers

What type of system carries large blocks of electrical energy over relatively long
distances?

A) A single-phase rural distribution system
B) A three-phase DC system
C) A transmission system
D) A utility generation system

What types of transformers are used in underground primary metering?

A) Direct buried isolation transformers
B) Current transformers
C) Both Current transformers & Voltage transformers
D) Voltage transformers

What is the most likely cause for a streetlight burning during daylight hours?

A) The photocell has failed
B) Timing clock malfunction
C) The ballast has failed
D) The lamp bulb has arced over between electrodes

Why is the ground trip block activated prior to switching on the recloser or load relief switching downstream of the recloser?

A) To increase the sensitivity of the recloser to imbalances between each phase and the other two in order to protect the main feeder and the substation breaker from switching surges
B) To initiate the lock out sequence due to an imbalance between each phase towards the neutral caused by excessive motor starting current
C) To prevent the recloser from operating due to switching surges that cause an imbalance between each phase and the neutral
D) To prevent the recloser from operating due to switching surges that cause an imbalance between one phase and the other two

What should be used to energize and de-energize oil filled equipment?

A) Class 3 rubber gloves
B) Appropriate insulated sticks
C) Load break tool
D) All of the above

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 False

What is a method of finding the neutral position on a regulator when there is no other means of identifying the neutral position?

A) Check across the source and load bushings with an approved voltmeter
B) Open cover plate and observe the tap changer position
C) Look at the pins on the backside of the rotation, adjusting bolt
D) Count the steps

What is the best rubber cover up component to use to cover up odd shaped conductors and equipment?

A) An odd shaped conductor cover
B) A rubber multi-purpose cover
C) An electric blanket
D) A rubber-insulating blanket

In a series street light circuit, what is the purpose of the red wire connected to the LSC?

A) It is a common ground
B) It is for a feed
C) It goes to the neutral
D) It goes to the load

All underground elbows are load break capable up to 100 Amps. Any load
above 100 Amps must be switched out in a switchgear.
True False

How many normally closed contactors, are needed to energize two feed wires for a 240-volt street light circuit?

A) Three
B) Four
C) Two
D) One

An Auto booster is capable of lowering the voltage on a distribution line.
True False

If the regulatory tap setting on a single-phase transformer is changed from tap C (100%) to tap D (97.5), what happens to secondary voltage?

A) It will increase
B) It will stay within + or – 2 volts of nameplate values
C) It will remain the same and current will increase
D) t will decrease

Why are switches installed in distribution feeder circuits?

A) To sectionalize or isolate a section for repairs
B) To redirect power flows for load balancing & To sectionalize or isolate a section for repairs
C) To reduce the systems susceptibility to fault current
D) To redirect power flows for load balancing

What is the purpose of a sectionalizer?

A) Isolates faults and protects the feeder and distributor
B) Installed on branch circuits to protect lateral fuses
C) Performs the same function as a recloser but more cost effectively
D) Wired in series with a recloser to activate the reclosing operation

There are two types of distribution regulators now in service. They are the
induction and the step voltage regulators.
True False

What is the term to describe a luminous discharge created by the ionization of air surrounding an electrical conductor?

A) Arc
B) Corona
C) Flash
D) Ozone

What does the number 25 on a luminaire indicate?

A) The amperage the lamp requires
B) 250 watts
C) The candlepower emitted from the lamp
D) The degree of refraction the lamp was constructed with

Which of the following is true about distribution transformer system voltages taps?

A) System voltage taps can be operated while energized
B) System voltage taps are used to correct low secondary voltage
C) Taps connected to the primary winding to broaden the range of system voltages suitable for installation
D) All of the above

In a circuit with three lamps in series, what will happen if one lamps filament burns out and becomes open?

A) The other lamps will remain lit no brighter or dimmer
B) The other lamps will remain lit but more dimly
C) The other lamps will remain lit but brighter until they burn out
D) The other lamps will not be lit

What are substation breakers and reclosers designed to protect?

A) The lineman
B) Customer’s equipment from faults
C) The substation and substation transformer
D) The feeder

In the substation part of the distribution protective scheme, the acronym “ACB” stands for automatic circuit breaker.
True False

Which of the following is true regarding a three phase delta circuit?

A) You can ground one conductor on a three phase delta circuit
B) If one phase is grounded the voltage between the other two phases and ground is equal to phase-to-phase voltage
C) Grounding two phases in a delta circuit creates a short circuit
D) All the above

If neutral position on a voltage regulator cannot be determined 100% due to vandalism or loss of other means, the employee should ________ before closing the bypass switches.

A) use an oscilloscope to verify switch position
B) tell the dispatcher to call the fire department
C) move to a safe area on the pole
D) de-energize the line

What is the safest way of completing electrical distribution work?

A) Ensure the feeder is set on one shot before grounding the line
B) Use hot sticks from the pole
C) De-energize, isolate, test, and ground
D) Contract the work out to less skilled crews

When paralleling transformers, what is the maximum allowable difference in rated impedance between the transformers?

A) No more than 92.5% below or 107.5% above
B) Impedance ratings must be identical
C) Percent ratings must be within + or – 2.5% of each other
D) Within 7.5% above or below each other

What is the maximum use voltage for class 2 rubber gloves?

A) 26, 000 volts ac rms
B) 15, 000 volts ac rms
C) 17, 000 volts ac rms
D) 600 volts ac rms

In addition to ensuring percent impedance of one transformer is between 92.5% and 107.5% of the other transformer, which of the following conditions must be met in order to parallel two single-phase transformers for greater capacity?

A) Voltage ratings must be identical and the transformers must be connected to the same primary phase & Tap settings and frequency ratings must be identical
B) Voltage ratings must be identical and the transformers must be connected to the same primary phase
C) Tap settings and frequency ratings must be identical
D) Polarity and KVA ratings must be the same

What is the most important article of protection for a lineman or cableman?

A) An approved hard hat with a collision avoidance system
B) A flame retardant jump suit with reflective stripes
C) A good pair of rubber gloves with proper dielectric strength
D) All of the above

What are the two types of capacitor banks?

A) Leading and lagging
B) Inductive and capacitive
C) Overhead and underground
D) Fixed and switched

Each work project and especially those projects requiring linemen and cablemen to handle energized electrical conductors should be planned in detail. What should this
plan ensure?

A) The positioning and location of all equipment
B) Written step-by-step procedures for the work to be done
C) The safety of the workers and the reliability of the electrical service
D) All of the above

Reclosers normally operate three times or less to prevent an outage due to a
temporary fault. Which of the following would cause a temporary fault?

A) A broken phase conductor lying on the ground
B) A tree limb brushing against a phase conductor
C) Phase conductors slapping together
D) Phase conductors slapping together & A tree limb brushing against a phase conductor

Why do transmission lines operate at higher voltages?

A) Higher voltages decrease the amount of time it takes electricity to travel the long distances associated with transmission lines
B) Higher voltages are required to make large power transformers work properly
C) Higher voltages increase the power carrying capacity of the line
D) All of the above

You have just de-energized a capacitor bank. How long do you need to wait before applying grounds?

A) 10 minutes
B) 2 minutes
C) No waiting if you use a shotgun to do the grounding
D) 5 minutes

Which of the following is true concerning a transformer with the following voltage rating on the nameplate: 12,470GRDY/7,200?

A) Indicates the transformer is to be delta connected on a 12,470 volt system
B) Indicates the transformer is a two bushing can
C) Indicates the transformer has reduced insulation at the neutral end of the primary coil
D) Indicates the transformer is for three phase applications

A transformer has a primary to secondary voltage ratio of 55/2. If the secondary voltage is 480 volts, what is the primary voltage?

A) 52.8 KV
B) 17.45 KV
C) 13.2 KV
D) 132 KV

What causes a voltage drop in an electric circuit that causes voltage to be less at the load end than it is at the source end of a line?

A) Customers use electricity all along the line reducing the quantity
B) Power lines get smaller toward the ends of the line, which causes more resistance to the current flowing through the line
C) Current flowing through the line impedance causes a voltage drop
D) All of the above

What component is used to regulate voltage on a line when capacitors are no longer effective?

A) Tap-changing transformers
B) Induction voltage regulators
C) Step voltage regulators
D) All the above

How is voltage regulation on any electrical system defined?

A) The degree to which frequency changes in a given system based on load of the circuit and torque on the generator
B) The amount of power factor correction required to supply good voltage to each part of the system
C) The difference in voltage between periods of no load and periods of full load on the system
D) The degree to which current lags voltage and heat losses are more severe on the electric system

What type of transformer bank configuration does the following illustration represent? 

A) WYE / WYE
B) WYE / Delta
C) Delta / Delta
D) Delta / WYE

A study of 10 linemen who regularly worked on energized 345 KV transmission lines conducted by personnel at John Hopkins University for a 10 year period concluded what about the health of the linemen?

A) The linemen had a better sense of direction and common sense at the expense of spelling proficiency and long-term memory
B) The linemen suffered minor damage to their livers though magnetic field effects are most likely not the cause
C) The linemen were in excellent health
D) The linemen suffered severe damage to the speech and creative centers of their brains

What must be done to the secondary circuits if a new transformer is to be connected in
parallel with an existing transformer?

A) Wire size and capacity must be similar
B) Connected with hotline tools
C) Phased in with a voltmeter
D) Wire impedance must be matched to the transformer

Which of the following are methods of controlling light emissions from streetlights?

A) Reflectors, refractors and diffusing globes or a combination are used to direct and control light
B) Variable resistors in the street light circuit control light intensity
C) Rheostats vary voltage to the lamp and control light intensity
D) Motorized elliptical iris controls light distribution

On a delta circuit, there is no return current through the ground.
True False

The magnitude of electric fields at ground level under all overhead transmission lines is
________.

A) very high
B) slightly high
C) moderate
D) very low

What is the purpose of capacitor banks installed on distribution circuits?

A) To absorb excess current flow
B) To improve the power factor
C) To maintain the power factor at unity
D) Add inductance to the line

Which of the following is considered to be an inductive load?

A) Resistive heating loads
B) Incandescent lighting loads
C) All of the above
D) Motor loads

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.
True False

The ground strap on a common single-phase pad mount distribution transformer
is connected to one end of the primary coil.
True False

What is the maximum use voltage for class 2 rubber gloves?

A) 17, 000 volts ac rms600 volts ac rms
B) 26, 000 volts ac rms
C) 600 volts ac rms
D) 15, 000 volts ac rms

What voltage does a typical single-phase pole mounted transformer feeding residential
customers supply?

A) 120/240
B) 120/208
C) 220/480
D) 277/480

Which of the following is true concerning transformer “polarity?”

A) A comparison of current direction in the primary windings verses the direction of current flow in the secondary windings at a given time
B) Identifies the transformer as a step up or step down transformer
C) Identifies the positive and negative bushings
D) An indication that a bushing is the north or South Pole magnetically

The purpose of a voltage regulator is to maintain a constant voltage on an
alternating current primary distribution circuit with variations in load.
True False

In the substation part of the distribution protective scheme, the acronym “ACB” stands for automatic circuit breaker.
True False

Each capacitor cell is equipped with a(n) ___________ which de-energizes each cell in about 5 minutes

A) Automatic ground switch
B) Internal discharge resistor
C) Lightning arrestor
D) Neutral buss

What is used to cover primary distribution conductors to protect the lineman from an accidental electrical contact?

A) Weatherproof insulation
B) Primary inhibitor compound
C) Rubber insulating line hose
D) XLP sleeves

What is a method of finding the neutral position on a regulator when there is no other means of identifying the neutral position?

A) Look at the pins on the backside of the rotation, adjusting bolt
B) Count the steps
C) Open cover plate and observe the tap changer position
D) Check across the source and load bushings with an approved voltmeter

In a normally closed contactor, when will the contacts be closed?

A) When it is energized
B) When it is dark
C) When it is daylight
D) When it is de-energized

You are doing an amp check on 100 KVA CSP because a customer called in and said it was making noise. You get 380 amps on one leg and 406 amps on the other. Is the
transformer overloaded?

A) Yes but only by a small margin
B) No but it is real close to being overloaded
C) Yes it is way overloaded
D) No it is not even close to being overloaded

What is Quadriplex overhead cable for?

A) Supplying two phase loads
B) Supplying three phase loads
C) Supplying large single phase loads
D) Supplying four phase loads

Some large industrial customers may be served directly from the transmission or sub-transmission circuits.
True False

What is used to counteract the buildup of capacitive reactance from extra high voltage transmission line circuits when it exceeds the ability of the system to absorb the reactive KVA?

A) Substation capacitor banks
B) Substation voltage regulators
C) Shunt reactors
D) Smoothing transformers with diode bridge arrays

On a common setup, how many times does a recloser operate before it locks out?

A) 2
B) 3
C) 1
D) 4

In a single phase wye circuit, current flows through the hot conductor and
returns to the source through the neutral.
True False

When will a sectionalizer lockout if fault current is present on a branch line?

A) The sectionalizer locks out to isolate the fault when the line is dead, on the third count by the recloser and the sectionalizer
B) The sectionalizer locks out on a dead line to isolate the fault only after the recloser has locked out to de-energize the line
C) The sectionalizer locks out on the third count to isolate the fault after the recloser has closed for the third time
D) The sectionalizer locks out on the second count by the recloser and the sectionalizer to protect the recloser from fault current

What does the hipot adaptor for phasing sticks allow you to do?

A) It applies a DC voltage on the cable to test them before they are energized
B) It allows you to test cable on high voltages
C) It allows you to test the insulating level of the cable
D) It applies an AC voltage on the cable to test them before they are energized

In a series street light circuit, what is the purpose of the red wire connected to the LSC?

A) It is for a feed
B) It is a common ground
C) It goes to the neutral
D) It goes to the load

What is the most likely cause for a streetlight burning during daylight hours?

A) Timing clock malfunction
B) The photocell has failed
C) The ballast has failed
D) The lamp bulb has arced over between electrodes

Why is the ground trip block activated prior to switching on the recloser or load relief switching downstream of the recloser?

A) To prevent the recloser from operating due to switching surges that cause an imbalance between each phase and the neutral
B) To increase the sensitivity of the recloser to imbalances between each phase and the other two in order to protect the main feeder and the substation breaker from switching surges
C) To prevent the recloser from operating due to switching surges that cause an imbalance between one phase and the other two
D) To initiate the lock out sequence due to an imbalance between each phase towards the neutral caused by excessive motor starting current

Reactive kilovolt-amperes can be supplied to the electrical system by connecting
___________ to the distribution circuits in the substations or out on the distribution
lines to neutralize the effect of customer inductive loads.

A) induction voltage regulators
B) shunt reactors
C) coupling capacitors
D) banks of capacitors

A switch cabinet is rated at 600 amps. This means:

A) The switch is rated to break a maximum load of 600 Amps
B) The switch is rated to carry a minimum of 600 Amps
C) The switch is rated to carry a maximum of 600 Amps
D) All of the above

When you raise a tap setting on a transformer from 3 to 2, you will increase the
voltage.
True False

How many times will our field reclosers operate before they lockout?

A) Four operations and then lockout
B) Two operations and then lockout
C) One operation includes all the cycles up to and including lockout
D) Three operations and then lockout

What piece of equipment is basically a transformer in nature used to improve voltage at or near the end of a primary distribution line?

A) Voltage amplifying reactor
B) Isolation transformer
C) Auto booster
D) Capacitor bank

What should be done before replacing a three-phase transformer?

A) Rotation should be checked marked and two wires changed on the new installation to make up for the difference in new and old transformers
B) Phasing is standard blue-to-blue, white to black, and red-to-red
C) Rotation should be checked, marked and returned the same way
D) Voltage and amperage checked to determine phase sequence

What should be used to energize and de-energize oil filled equipment?

A) All of the above
B) Load break tool
C) Class 3 rubber gloves
D) Appropriate insulated sticks

When putting a regulator back on line, the bypass switch is opened after the source side switch is closed and before the load side switch is closed to energize the neutral indicator, prevent shock to the windings, and to prevent an outage.
True False

What are the two main reasons linemen wear safety hard hats?

A) To protect the head from the impact of falling or moving objects and electrical contact
B) To protect the head from the impact of heavy objects by spreading the force across the top of the skull so it will be equally distributed to the body
C) To keep the head cool and block sunrays that might damage the lineman’s skull
D) All of the above

What is the best rubber cover up component to use to cover up odd shaped conductors and equipment?

A) An electric blanket
B) An odd shaped conductor cover
C) A rubber-insulating blanket
D) A rubber multi-purpose cover

Which type of transformer bank can you install on a four-wire WYE system?

A) WYE / WYE
B) Delta / Delta
C) WYE / Delta
D) All of the above

When changing out a transformer that is paralleled with another transformer, what needs to be done before disconnecting the primary connection with a shotgun or switch
stick?

A) Open the secondary breaker and remove neutral / ground connections
B) Secondary phase conductors must be disconnected from the transformer
C) Secondary phase conductors must be grounded
D) All wires on the secondary side must be disconnected from the transformer

What type of transformer connection is shown in the following illustration?

A) Single phase parallel
B) Delta - Delta
C) Open Wye – Open Delta
D) Open Delta – Open Delta

Conductor covers, insulator covers, and cross arm covers are fabricated from rubber
and what other material?

A) Water-soluble oil impregnated fiber barrier board
B) Plasticized carbon filament
C) High dielectric polyethylene
D) Laminated canvas

Phase sequence has no effect on poly-phase motors.
True False

What meter would you use at the customers meter housing prior to placing load on it to
ensure that the phase sequence is correct?

A) Rotation Meter
B) Phasing Set
C) Amp Meter
D) Volt Meter

What is the frequency of alternating current generated in the United States and Canada?

A) 50 hertz
B) 120 hertz
C) 60 hertz
D) None of the above

How is an insulator hood properly installed?

A) It will snap into place around the insulator leaving a perfect   inch gap between the hood and the line hose to eliminate tracking
B) It will snap into place around the insulator leaving a perfect   inch gap between the hood and the line hose to eliminate tracking
C) It will snap into place below the cross arm
D) It will overlap the line hose when properly installed

Once secondary phase conductors have been removed from an energized
overhead transformer, they should be considered energized until the connection
status of both ends of the secondary mains are verified open and not paralleled
to another transformer.
True False

Class 0 rubber gloves are AC proof tested to __________ volts rms and DC proof tested to __________ volts average

A) 10,000 and 20,000
B) 5,000 and 20,000
C) 10,000 and 10,000
D) 1,000 and 5,000

What component is used to regulate voltage on a line when capacitors are no longer
effective?

A) Tap-changing transformers
B) Induction voltage regulators
C) Step voltage regulators
D) All the above

On primary metering installations, what is the purpose of current transformers?

A) To take a percentage of the customers load in volts and send it to the meter for measurement
B) To take a percentage of the customers load in amps and send it to the meter for measurement
C) To take a percentage of the customers load in watts and send it to the watt-hour meter for measurement
D) To supply low voltage power to operate metering equipment (house power)

What is the purpose of a sectionalizer?

A) Performs the same function as a recloser but more cost effectively
B) Wired in series with a recloser to activate the reclosing operation
C) Installed on branch circuits to protect lateral fuses
D) Isolates faults and protects the feeder and distributor

In addition to changing voltage from one level to another; what else do power transformers do?

A) Acts as a dampening device by converting harmful line vibrations to low frequency sound that is discharged within the boundaries of the substation
B) Cool the incoming power so that it will reduce heating effect in the outgoing circuit
C) Converts DC power to AC and vice versa depending on how they are wired
D) Regulate the voltage level and control the flow of reactive Kilovolt-amperes in the power system

What is the purpose of a sectionalizer?

A) Wired in series with a recloser to activate the reclosing operation
B) Installed on branch circuits to protect lateral fuses
C) Isolates faults and protects the feeder and distributor
D) Performs the same function as a recloser but more cost effectively

In addition to changing voltage from one level to another; what else do power transformers do?

A) Regulate the voltage level and control the flow of reactive Kilovolt-amperes in the power system
B) Cool the incoming power so that it will reduce heating effect in the outgoing circuit
C) Acts as a dampening device by converting harmful line vibrations to low frequency sound that is discharged within the boundaries of the substation
D) Converts DC power to AC and vice versa depending on how they are wired

Which type of contactor is normally closed?

A) LC
B) BB
C) AB
D) AA

What is calculated when the resistance, inductive reactance, and capacitive reactance
are considered to determine the total opposition to current in a circuit?

A) Impedance
B) Conductive resonance
C) Frequency
D) Specific resistance

What type transformer is used in a series street lighting circuit?

A) Light sensitive controlled transformer
B) Variable wattage
C) Constant current
D) Low resistance

The voltage variation to residences (secondary) has been standardized. What are the
low and high limits?

A) 100 and 130
B) 110 and 130
C) 114 and 126
D) 115 and 125

Each work project and especially those projects requiring linemen and cablemen to handle energized electrical conductors should be planned in detail. What should this plan ensure?

A) The positioning and location of all equipment
B) The safety of the workers and the reliability of the electrical service
C) Written step-by-step procedures for the work to be done
D) All of the above

What does protective equipment provide the lineman?

A) Barriers for absolute protection from injury
B) A margin of safety for error without injury
C) A safety factor of from 2 to 5 depending on line voltage
D) All the above

At what percentage of coil rating do most reclosers operate?

A) 200%
B) 75%
C) 160%
D) 120%

Why is the neutral floated on a WYE / Delta bank?

A) To prevent circulating currents in the delta if a fault develops
B) To prevent the bank from becoming a grounding bank if a fault develops
C) To prevent a delta in which triple harmonic currents will circulate
D) All of the above

What limits the capacity of overhead AC transmission lines?

A) Thermal expansion and resulting sag of line conductors
B) The operating frequency of the line conductors
C) The direction the line is routed in relation to the earth’s magnetic field
D) The amount of voltage to be transmitted by the line

Reclosers are installed with _______ switches so that the unit can be taken out of service for maintenance without interrupting power to customers.

A) bypass
B) vacuum
C) gang
D) oil

What happens to the current on the neutral of a wye system when the loads between
the phases are not balanced?

A) The current goes up on the neutral
B) The current is zero
C) The current goes down on the neutral
D) The current remains constant on the neutral

Single-phase transformers generally have additive polarity if they meet which of the following conditions?

A) They have 3 or more secondary bushings and a BIL greater than 120
B) Smaller than 200 KVA and operate at a voltage less than 8,660
C) Larger than 200 KVA and operate at a voltage greater than 8,660
D) They have 2 or more primary bushings and a BIL greater than 90 KVA

You have just de-energized a capacitor bank. How long do you need to wait before
applying grounds?

A) 2 minutes
B) 10 minutes
C) 5 minutes
D) No waiting if you use a shotgun to do the grounding

Why do transmission lines operate at higher voltages?

A) Higher voltages decrease the amount of time it takes electricity to travel the long distances associated with transmission lines
B) Higher voltages are required to make large power transformers work properly
C) Higher voltages increase the power carrying capacity of the line
D) All of the above

The magnitude of electric fields at ground level under all overhead transmission lines is
________.

A) very high
B) moderate
C) slightly high
D) very low

What facility is used to switch generators, equipment and circuits or lines in and out of
the system, change AC voltages from one level to another and/or change alternating
current to direct current or direct current to alternating current?

A) A power plant
B) A synchronizing station
C) A sub station
D) A control station

What are the two basic checks made after energizing a new capacitor bank to detect
open or defective capacitors or excessive neutral current?

A) Voltage and current readings on each primary lead and neutral
B) Current and frequency readings on each primary lead and neutral
C) Visual inspection and microfarad check with C-meter
D) Voltage and rotation readings on each primary lead and neutral

What does the term “CSP” stand for?

A) Consolidated spaced primary
B) Completely self-protected
C) Closed standoff position
D) Circuit switch protector

What is the definition of a sectionalizer?

A) A protective device that will lockout to prevent fuses from blowing
B) A protective device that ensures the recloser will lock out on a given number of counts
C) A protective device used to sectionalize a branch circuit and works in conjunction with a recloser wired ahead of it
D) A fiberboard or barrier used to sectionalize switch cabinets for safety

How does a capacitor bank correct the power factor in an area with a large inductive
load?

A) It uses a load rated tap changing system to adjust voltage on the line
B) It generates peaking voltage through discharge of electrons from its plates
C) It stores voltage to overcome motor starting power demands
D) It stores a charge and returns it to the line creating capacitive reactance that aid in correcting the power factor

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 False

What type of fuse limits the magnitude of current flow by introducing a high resistance
after the fuse element melts?

A) Expulsion Fuse
B) Current-limiting Fuse
C) Kwick Fuse
D) Tardy Fuse

Substation disconnect switches are designed to interrupt charging current and
full load current with no modifications or specific designs.
True False

In distribution substations, what regulates the substation bus voltage?

A) Programmable voltage regulators
B) Induction voltage regulators
C) Power transformers equipped for voltage regulation
D) Step voltage regulators

Which of the following statements is true concerning a WYE / Delta Bank with the center can center tapped to provide single-phase loads?

A) Each of the transformers carries one third of the single-phase load
B) 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
C) Each transformer carries an equal amount of both the single and three phase loads
D) The lighter can caries 2/3 of the three-phase load and 1/6 of the single phase load

Why do transmission substations contain equipment used to sectionalize the electric
transmission system when a fault or short circuit develops on one of the circuits?

A) The line is automatically switched out before high load conditions can create a fault or short circuit condition
B) The defective circuit is switched out automatically protecting the remaining portion of the transmission network from trouble
C) The defective circuit is switched out automatically to protect the public and environment from fire
D) The transmission system does not use sectionalizing equipment because the size would be too large to be supported by a single pole

When removing an electronic recloser from service, for maintenance, what must you
do before closing the bypass switches?

A) Set recloser by pulling yellow ring down
B) Turn control switch to bypass
C) Block ground trip
D) Set recloser by pulling silver L shaped handle down

In addition to a position indicator that shows tap position, what does our step voltage
regulators have to indicate the neutral position?

A) A step position counter
B) A step position LED
C) A neutral light
D) step position enunciator

What does the term “ATO” stand for?

A) Assembled to order
B) Automatic throw-over
C) Automatic time / over-current relay
D) Apprentice training organization

When will the sectionalizer only count?

A) When the recloser momentarily opens and de-energizes the line
B) When the recloser locks out
C) When a fault occurs between the recloser and the sectionalizer
D) When the recloser re-energizes the line

What is the purpose of an ATO?

A) Switches customer’s supply feed from one source to another without interruption of power in the event of loss of primary feed
B) Automatically ties feeder circuits
C) Reduces load on a system
D) Automatically disconnects the customer in the event of a fault

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?

A) 138.5 volts
B) 240 volts
C) 120 volts
D) 660 volts

While phasing two secondary circuits, what should the employee do after getting a zero
reading?

A) Assume the circuits are de-energized and connect
B) Use the flash test on the transformer tank to validate meter function
C) Put on class two rubber gloves and connect
D) Check the meter on a known source to validate the meter

Regulators have tap position indicators that use either a gauge or a light to
indicate the neutral position.
True False

What does the L shaped lever on a hydraulic recloser do?

A) Opens or closes the bypass switch contacts
B) Opens and closes the switch contacts
C) De-energizes the recloser
D) Sets recloser for non-reclosing or normal mode

Which of the following is a principle function of reclosers?

A) Protects conductors and equipment from major damage by reacting quickly and preventing temporary faults from becoming permanent
B) Reclosers lock out when a permanent fault occurs to confine the outage to a smaller area rather than losing the entire feeder
C) Clears temporary faults by using a series of operations that allow the fault to clear itself
D) All of the above

What is the function of a distribution transformer?

A) To step up secondary voltage to primary voltage
B) Reduce the voltage in the primary circuit to the utilization voltage required by the customer
C) To step down primary current to secondary current
D) Reduce the current in the primary circuit to the utilization current required by the customer

When a fault occurs beyond a sectionalizer that is of a permanent nature, the
sectionalizer will lock out immediately to protect the system.
True False

What is the polarity of the transformer illustrated below?

A) Negative
B) Additive
C) Positive
D) Subtractive

On primary metering installations, what are voltage transformers used for?

A) To proportionally reduce the voltage to a measurable value
B) To change the metering ratio to reflect customer’s power usage
C) To fine tune and stabilize the customer’s voltage
D) To proportionally reduce the current to a measurable value