Linear motion of a conductor through a magnetic field produces a
sine wave
True/False
1 Peak AC = .707 peak DC
True
How are voltmeters connected
To the secondary windings of potential transformers
True/False
Lax is located in WLA
Transmission system is nominal
69kv and above
An employee who is certified to receive Work Authorities from an Issuing Authority or their Field Representatives
AUTHORIZED PERSON
APT are used for the following:
• Restrict operation or other action so personnel and/or systems and components are protected.
• Warn that the tagged system or component is in a condition for test or maintenance activities.
• Indicate if the system or component is under the operating Jurisdiction of an organizational unit other than the Issuing Authority
Clearance - which statement is not true
all sources of energy
correct is "specific sources of energy"
Ok To
Grants permission for specific acts under specific conditions on specific conditions
Load Dispatch provides instructions
clearly, correctly
True/ False
Start work closest to the hazard and work away from the hazard
True
Grounding is required before conducting work on a circuit or piece of equipment under a
CLEARANCE
above 7.5kV
True/False
On lines and cables 69kV and above, the ground switch is closed on Load Dispatcher orders after a
CLEARANCE is issued
True
With adjoining CLEARANCES, the point of overlap will be tagged with two
DO NOT OPERATE APTs
Provide a substantial obstacle to the operation of a CB or other handle
Orange caps
When projecting a ground through a set of closed disconnects, the disconnects will be tagged with the as the portable grounds
same APT number
Not an approved/authorized abbreviation for regulator
"Reg"
True/False
“Out of Service” stamp is in blue or black ink
True
True/False
Each new day that the station is attended all brought forwards are logged under the new day and
cancelled on the previous day
True
The □□□□ CLEARANCE stamp is issued by the Load Dispatcher to the station, and the operator logs it and
issues to Authorized Persons
secondary clearances
The number of boxes with slashes through them for the primary clearance stamp indicate the number
of issued by the station under the primary clearance
secondary or working clearances
True/False
Conferring with the ACO is not part of a type 1 inspection
True
In an emergency situation, the type 1 inspection....
can be limited to only the equipment associated with the emergency
True/False
If time is a factor, the work crew may leave the station, but the operator must perform a type 1 inspection
before beginning any switching
True
A type 2 inspection is usually conducted for each station
monthly
It is not normally necessary to put the RTU on local...
before beginning a station inspection
Wearing clothing made from is recommended but not required
natural fibers
True/False
An employee must show a department security guard their ID if on department property and/ or on shift.
-“You do not have to show ID when off duty except when you are on DWP property”
True
A power bank in a DS converts 34.5kV to
4.8kV
The arc interrupting/extinguishing material that occupies the space between open contacts in a CB or other piece of equipment
dielectric medium
Ammeters are fed by a maximum current of from the secondary coil of a current transformer.
5 amps
True/False
The service to customers can be negatively affected by energizing a bank from the low side
True
Characteristics of fuses
reliable
non re-useable
non selective
inexpensive
Protection should be used on equipment that regularly has faults
Relays
Applied after all CBs are closed
Bank in Service caps
In an ungrounded 4.8kV delta configuration, the nominal voltage from phase to ground is
2.77kV
Output voltage from the secondary windings on a PT
120v
True/False
Equipment under a CLEARANCE is isolated from specified sources of energy
True
Personnel not considered Field Representatives
System Protection
All primary clearances should originate from the
Energy Control Center
A secondary clearance is also known as a
working clearance
Operators generate APTs for all of the following except
34.5kV circuits entering the station (lines and cables) are issued APTs under the load dispatchers
jurisdiction
An OK TO work hot with a hold in case of relay on a line is given under
dual jurisdiction
Varying log books are located at the
OCC
DS
RS
SS
The CLEARANCE TO stamp signifies a
secondary or working clearance
True/False
Customer Stations are usually located on private property and provide service to only one customer. -“Which of the following is correct?”
True
A declaration made by the issuing Authority that involved circuit, circuit component, or equipment has been Disconnected and/or Isolate from specified sources of energy and will remain so Disconnected and/or Isolated
Out of Service - out of service equipment is not part of the power system
Define "As is"
OO-1
True/False
OK TO stamps are always preceded by the entity receiving the work authority
True
True/False
When there are adjoining clearances, the operator, and only the operator, may operate the disconnects that
are the border between the two clearances
True
There is no such thing as a
secondary OK TO
Slashes in the boxes of a primary OK TO stamp indicate the number of OK TO’s issued on a
specific piece of equipment
True/False
In a gas company station a feeder can be supplied from the 4.8kV transfer bus unregulated and regulated and from the 4.8kV reactor bus unregulated
True
For the □□□□ OK TO ____ stamp, the blank if filled in with the
work performed
A qualified person, trained to safely and competently hold work authorities, has demonstrated knowledge of policies, practices, and procedures related to work authorities
Authorized person
An Authorized Person can work on non-system equipment up to
300V and below
An OK TO work hot on a 34.5kV line is under the jurisdiction
Load Dispatcher’s
In a Gas Company Station a in the feeder position limits fault current to the regulators
reactor
Regulators regulate voltage at the
load center
True/False
Proper voltage improves equipment efficiency
True
Most important reason for a station
inspection
To confirm the status of equipment and switching conditions
Voltage at the load center is the same as the power bank’s output voltage at a distributing station minus
the line losses when the regulators are
blocked on neutral
Simulates the voltage drop between the regulator and load center
Line-drop compensator
Local work
performed on non system equipment
True/False
A CLEARANCE that is overheld or brought forward is treated the same as any other clearances
True
True/False
On a 230kV bus, the clearance is issued before closing ground switches or applying portable grounds upon
receiving the Load dispatchers orders
True
Installing is the most practical solution to adjust for the voltage drop on an overloaded
feeder circuit
line capacitors
APTs are signs that have preprinted instructions and markings used to restrict operation of a
piece of equipment
temporary
True/False
For brought forwards in the log book, the previous day’s entry that is brought forward is cancelled
True
The slashes in an OK TO primary stamp indicate how many OK TOs there are...
on a specific piece of equipment or circuit.
In an AC circuit, true power equals the product of and the
apparent power, power factor
True/False
In a DS transformer, the power (volts x amps) is equal to the power out minus losses
True
Vectors have both and
magnitude, direction
In a capacitive AC circuit, the current sine wave the voltage sine wave--ICE
leads
True/False
Single phase apparent power is equal to the current multiplied by the voltage –P=IE
True
Main power banks at receiving stations are not wye-delta, they are wired
wye-wye
Distribution Station banks are wired
delta-delta
True/False
Autotransformers are not self-regulating
True
Transformers can be overloaded for 2 hours
125%
Transformers can be overloaded for 60 seconds
370%
True/False
Hot spot temperatures (often associated with the winding temperature) exceeding 95⁰C reduces the efficiency and life expectancy of transformers
True
What increases the rate of cooling on Transformers
Increasing surface area, air movement, and/or oil circulation
Control current flow in a circuit
CB
Air is a good insulator at
room temperature
True/False
LTC banks are not used for voltage control at generating stations and switching stations.
True
True/False
Line potential transformers are not used for voltage control
True
maintain proper feeder voltage
CMVM
Coordinates system voltage
ECC
If subtransmission lines don’t have voltage control, are the most affected
34.5kV customer stations
True/False
A 1% change in voltage will cause a 3% change in illumination for a incandescent light bulb
True
A line drop compensator simulates
impedance
f a feeder regulator is inoperative, the operator must contact the....
ACO, ETB and load dispatcher
True/False
Meters reading +VAR indicate VARs leaving the piece of equipment the metering is associated with
True
...must be kept and filed for each drawing that is updated/changed
3 obsolete drawing
For updating drawings, deletions are in and additions are in
green, red
Print sizes smallest to largest
D<DR<A
In wiring diagrams, the view is usually the one shown unless specified otherwise
rear
One line operating diagram
sizes are and
D, DR
Resistance, capacitive reactance, and inductive reactance, are all measured in
ohms
In the department’s three phase electrical system, the sine waves are apart
120⁰
Open delta wiring reduces the power output to
58%
In a wye configuration, line voltage is equal to the product of the...
phase voltage and 1.73
Buccholz relays (sudden pressure) trip both of the bank
high and low sides
The of the primary winding determines how much current flows in transformers
impedance
Station service can be wired through 2 cans
open delta
At an RS, a 230/34.5 bank is wired
wye-wye
Determines the capacity of a transformer
Temperature
Is used to determine load conditions at the load center
Line drop compensator
True/False
If a CB opens too quickly, destructive overvoltage can be created
True
At a DS, a no load tap changer is adjusted to the voltage when the regulators are consistently at
maximum
raise, boost
LTC line bank controls at an
voltage, RS
LRC banks control voltage at
Distribution Stations
True/False
34.5kV capacitors can be found in Distribution Stations, Receiving Stations, and subtransmission
True
True/False
With 3-pole gang operated DISCs, a line CB is not included in a bus CLEARANCE when the DISCs
between the bus and the CB are open, even if line DISCs are opened
True
True/False
□□□□ CLEARANCE IN THE FIELD always gets a slash upon issuance
True
True/False
A clearance outstanding gets carried forward and cancelled on the previous day
True
True/False
The voltage drop on a feeder can be reduced by: shortening the feeder, installing a line capacitor, placing
a synchronous condenser to full boost, or reducing the load
True
Excessive operation on a regulator is indicative of the being too narrow and/or the
being too short
bandwidth, time delay
True/False
Line Patrol Mechanics, ESM, and SSO are allowed to switch in a customer station.
True
True/False
Changes in regulator output is determined by fluctuations in customer load
True
A causes the regulator motor to operate
CMVM
True/False
Inductive-capacitance in not part of AC circuit impedance
True
Department or contract employee trained, certified, and signed off on by a supervisor. Also a QEW
authorized person
True/False
Excessive operation of a regulator is prevented by: the time delay, the band width, and/or the CMVM. Not by the feeder load
True
Bucholz relay protects the bank from faults in the
zone of protection
True/False
A fault on a 4.8kV bus is protected by Bank relays
True
A directional overcurrent relay trips at the
local end
True/False
If a feeder is locked out and the operator notices that the regulators are bad, the position should be
isolated, the 4.8kV transfer bus prepared, and the ECC notified
