LADWP Electric Station Operator Exam 2026 (Circuit Breakers,
Disconnects, Transformers) | All Questions and Correct
Answers | Verified Answers | Just Released
Station ___________ transformers are the distribution transformers for
substations. They provide the station with single-phase power for light, etc. and
three-phase power for such things as fans, pumps, gate motor, compressors, etc. -
--------CORRECT ANSWER-----------------service
A special type of transformer is the __________ transformer. They are used for
measurement of electrical quantities and for control purposes. ---------CORRECT
ANSWER-----------------instrument
Transformer ratios of 400:1 are typically used in __________ transformers,
depending on the installation and equipment needs. ---------CORRECT ANSWER-----
------------instrument
__________ transformers are used to step voltage down to a safe value, typically
120 volts. ---------CORRECT ANSWER-----------------potential
____________ transformers are used to step down current to a safe value, a
maximum of 5 amps. ---------CORRECT ANSWER-----------------current
,A great variety of operating conditions can be easily reproduced on the
___________. These include routine line, bank, bus, and feeder switching for
example. Equipment failures, faults conditions and their resultant relay
operations can also be included in simulator exercises. ---------CORRECT ANSWER--
---------------simulator
__________ are hook-stick operated and gang-operated. ---------CORRECT
ANSWER-----------------disconnects
__________ switching is performed in substations: to provide adequate capacity
for customer load, to provide an alternate source for customer load when
equipment maintenance is required, and to search for 4.8kV grounds. ---------
CORRECT ANSWER-----------------bank
__________ stations banks are configured with either one or two 4.8kV (low side)
circuit breakers (CBs). ---------CORRECT ANSWER-----------------distribution
Disconnects, through which current normally flows, must remain __________ at
all times. ---------CORRECT ANSWER-----------------closed
Disconnects through which current does not normally flow usually remain
_________. ---------CORRECT ANSWER-----------------open
, A certain amount of current flows when a bank is first energized. This current is
known as __________ current. ---------CORRECT ANSWER-----------------magnetizing
When energizing large banks, __________ current can be considerable and may
negatively affect customer service if not performed properly. ---------CORRECT
ANSWER-----------------magnetizing
Proper procedure requires banks to always be energized from the __________
side. ---------CORRECT ANSWER-----------------high
The act of connecting two circuits together so that current can simultaneously
flow through both of them in known as __________. ---------CORRECT ANSWER----
-------------paralleling
In distribution stations, load is transferred to a paralleled bank by normally
opening the bank __________ side CB or CBs. ---------CORRECT ANSWER--------------
---low
Bank-in-Service caps are __________ devices that are applied to the control
handles of closed bank CBs. ---------CORRECT ANSWER-----------------blocking
Disconnects, Transformers) | All Questions and Correct
Answers | Verified Answers | Just Released
Station ___________ transformers are the distribution transformers for
substations. They provide the station with single-phase power for light, etc. and
three-phase power for such things as fans, pumps, gate motor, compressors, etc. -
--------CORRECT ANSWER-----------------service
A special type of transformer is the __________ transformer. They are used for
measurement of electrical quantities and for control purposes. ---------CORRECT
ANSWER-----------------instrument
Transformer ratios of 400:1 are typically used in __________ transformers,
depending on the installation and equipment needs. ---------CORRECT ANSWER-----
------------instrument
__________ transformers are used to step voltage down to a safe value, typically
120 volts. ---------CORRECT ANSWER-----------------potential
____________ transformers are used to step down current to a safe value, a
maximum of 5 amps. ---------CORRECT ANSWER-----------------current
,A great variety of operating conditions can be easily reproduced on the
___________. These include routine line, bank, bus, and feeder switching for
example. Equipment failures, faults conditions and their resultant relay
operations can also be included in simulator exercises. ---------CORRECT ANSWER--
---------------simulator
__________ are hook-stick operated and gang-operated. ---------CORRECT
ANSWER-----------------disconnects
__________ switching is performed in substations: to provide adequate capacity
for customer load, to provide an alternate source for customer load when
equipment maintenance is required, and to search for 4.8kV grounds. ---------
CORRECT ANSWER-----------------bank
__________ stations banks are configured with either one or two 4.8kV (low side)
circuit breakers (CBs). ---------CORRECT ANSWER-----------------distribution
Disconnects, through which current normally flows, must remain __________ at
all times. ---------CORRECT ANSWER-----------------closed
Disconnects through which current does not normally flow usually remain
_________. ---------CORRECT ANSWER-----------------open
, A certain amount of current flows when a bank is first energized. This current is
known as __________ current. ---------CORRECT ANSWER-----------------magnetizing
When energizing large banks, __________ current can be considerable and may
negatively affect customer service if not performed properly. ---------CORRECT
ANSWER-----------------magnetizing
Proper procedure requires banks to always be energized from the __________
side. ---------CORRECT ANSWER-----------------high
The act of connecting two circuits together so that current can simultaneously
flow through both of them in known as __________. ---------CORRECT ANSWER----
-------------paralleling
In distribution stations, load is transferred to a paralleled bank by normally
opening the bank __________ side CB or CBs. ---------CORRECT ANSWER--------------
---low
Bank-in-Service caps are __________ devices that are applied to the control
handles of closed bank CBs. ---------CORRECT ANSWER-----------------blocking
