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LADWP Electric Station Operator (Circuit
Breakers, Disconnects, Transformers)
Questions and Correct Answers
One of the primary tasks of the Electric Station Operator is the
__________ of high voltage circuits. Ans: — switching
Electrical current may flow across the contacts of ____ to ____
electrical switches before it reaches the consumer. Ans: — 50 100
The __________ operation of these electrical switches can pose a
serious hazard to personnel, can cause destruction of expensive
power system equipment, and can cause unnecessary interruption
of electrical service to consumers. Ans: — improper
Electrical __________ are installed in the path from the generator to
the consumer to provide reliability, flexibility, and safeguards for
the electrical power system. Ans: — switches
Operators use electrical switches to perform routine, automatic,
and ____________ switching operations on the electrical system.
Ans: — emergency
___________ switching is for maintenance, construction, cleaning,
testing, etc. Ans: — Routine
___________ switching operations include automatic reclosers
(ARs), Voltage Pickup Unit (VPUs), and Automatic Transfer
Switching (ATSs). Ans: — Automatic
___________ switching operations include insolate trouble,
restoration, 4.8kV Ground Search, etc. Ans: — Emergency
The placement of ___________ electrical switches in the power
system makes it possible to limit both the duration and the extent
of power outages. Ans: — Automatic
__________ switching performed by Operators in usually in
response to power outages and abnormal conditions such as
overloads. Ans: — Emergency
© 2025 All rights reserved
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The electrical function of switches falls into two categories;
___________ of relatively high values of current and voltage under
load AND the switching of circuits to provide a visual confirmation
of de-energization. Ans: — manipulation
__________ are electrical switches that are used to manipulate high
values of current and voltage in circuits that are carrying current
or will be carrying current following the operation. Ans: — Circuit
breakers
Transformers and voltage regulators must be energized and de-
energized using __________. Ans: — Circuit breakers
__________ are designed to open, close, energize, de-energize, and
interrupt normal and abnormal values of current flow in electrical
circuits Ans: — Circuit breakers
__________ are provided as a method of visually confirming that a
circuit has been "disconnected" from specified sources of electrical
energy. Ans: — Disconnects
__________ are used to energize or de-energize short sections of
conductor such as leads connecting a circuit breaker to its
associated disconnects. Ans: — Disconnects
__________ are not designed to interrupts current flow, open or
close circuits, or energize and de-energize circuits other than short
sections. Ans: — Disconnects
During abnormal conditions, current often exceeds the normal
limitation of these devices by as much as _____ to _____ times their
normal rating. Ans: — 10 20
This is the insulating mechanism that occupies the space between
the open contacts of a CB and prevents the flow of current
through the device while the contacts are in the open position.
Ans: — Dielectric medium
The ability of a substance to prevent the flow of electrical current
is described as its __________ strength. Ans: — Dielectric
__________ of electricity have no dielectric strength, as they allow
current to flow in a circuit. Ans: — Conductors
© 2025 All rights reserved
LADWP Electric Station Operator (Circuit
Breakers, Disconnects, Transformers)
Questions and Correct Answers
One of the primary tasks of the Electric Station Operator is the
__________ of high voltage circuits. Ans: — switching
Electrical current may flow across the contacts of ____ to ____
electrical switches before it reaches the consumer. Ans: — 50 100
The __________ operation of these electrical switches can pose a
serious hazard to personnel, can cause destruction of expensive
power system equipment, and can cause unnecessary interruption
of electrical service to consumers. Ans: — improper
Electrical __________ are installed in the path from the generator to
the consumer to provide reliability, flexibility, and safeguards for
the electrical power system. Ans: — switches
Operators use electrical switches to perform routine, automatic,
and ____________ switching operations on the electrical system.
Ans: — emergency
___________ switching is for maintenance, construction, cleaning,
testing, etc. Ans: — Routine
___________ switching operations include automatic reclosers
(ARs), Voltage Pickup Unit (VPUs), and Automatic Transfer
Switching (ATSs). Ans: — Automatic
___________ switching operations include insolate trouble,
restoration, 4.8kV Ground Search, etc. Ans: — Emergency
The placement of ___________ electrical switches in the power
system makes it possible to limit both the duration and the extent
of power outages. Ans: — Automatic
__________ switching performed by Operators in usually in
response to power outages and abnormal conditions such as
overloads. Ans: — Emergency
© 2025 All rights reserved
, 2 | Page
The electrical function of switches falls into two categories;
___________ of relatively high values of current and voltage under
load AND the switching of circuits to provide a visual confirmation
of de-energization. Ans: — manipulation
__________ are electrical switches that are used to manipulate high
values of current and voltage in circuits that are carrying current
or will be carrying current following the operation. Ans: — Circuit
breakers
Transformers and voltage regulators must be energized and de-
energized using __________. Ans: — Circuit breakers
__________ are designed to open, close, energize, de-energize, and
interrupt normal and abnormal values of current flow in electrical
circuits Ans: — Circuit breakers
__________ are provided as a method of visually confirming that a
circuit has been "disconnected" from specified sources of electrical
energy. Ans: — Disconnects
__________ are used to energize or de-energize short sections of
conductor such as leads connecting a circuit breaker to its
associated disconnects. Ans: — Disconnects
__________ are not designed to interrupts current flow, open or
close circuits, or energize and de-energize circuits other than short
sections. Ans: — Disconnects
During abnormal conditions, current often exceeds the normal
limitation of these devices by as much as _____ to _____ times their
normal rating. Ans: — 10 20
This is the insulating mechanism that occupies the space between
the open contacts of a CB and prevents the flow of current
through the device while the contacts are in the open position.
Ans: — Dielectric medium
The ability of a substance to prevent the flow of electrical current
is described as its __________ strength. Ans: — Dielectric
__________ of electricity have no dielectric strength, as they allow
current to flow in a circuit. Ans: — Conductors
© 2025 All rights reserved
