LADWP ELECTRIC STATION OPERATOR
OPERATING PROCEDURES EXAM WITH
QUESTIONS AND VERIFIED ANSWERS,
PLUS DETAILED RATIONALES/EXPERT
VERIFIED FOR GUARANTEED PASS
2026/LATEST UPDATE/INSTANT
DOWNLOAD PDF
1. During a planned switching operation, an Electric Station
Operator receives a written switching order that requires several
circuit breakers and disconnect switches to be operated in sequence.
Before beginning, the operator notices that the equipment
identification on one disconnect does not exactly match the
identification written in the order. What is the most appropriate
action?
A. Operate the device because its physical location appears correct.
B. Ask another operator to identify the device visually and then proceed.
C. Stop the switching operation and resolve the identification
discrepancy before operating anything.
D. Operate the device slowly so that an error can be detected before
completion.
Answer: C. Stop the switching operation and resolve the
identification discrepancy before operating anything.
Rationale: Correct equipment identification is fundamental to safe
switching. An operator should never rely solely on physical location,
appearance, or assumption when the identification does not agree with
the authorized switching order. A discrepancy can indicate an
incorrect device, an outdated diagram, an equipment-labeling
1
,problem, or an error in the order. Proceeding despite uncertainty
could unintentionally energize, de-energize, isolate, or ground the
wrong circuit.
2. An operator is preparing to open a circuit breaker as part of a
planned outage. The switching order specifies the breaker by station
name, bay designation, and equipment number. Which principle
should govern the operator's action?
A. Operate the device based primarily on its handle color.
B. Verify the device against the switching order and applicable station
indications before operation.
C. Operate the breaker identified by the nearest equipment tag.
D. Ask maintenance personnel which breaker is normally used and
substitute it if necessary.
Answer: B. Verify the device against the switching order and
applicable station indications before operation.
Rationale: Switching requires positive identification of the intended
equipment. Operators should correlate the written order with
equipment labels, control indications, diagrams, and other authorized
identification methods. Color, physical proximity, or informal advice is
not an adequate substitute for positive identification. Substituting
equipment without authorization can create unsafe system conditions
and invalidate the intended switching sequence.
3. A circuit breaker is commanded to open from the control panel.
The control indication does not change to the expected open status.
What should the operator do first?
A. Assume the breaker opened because the command was issued.
B. Issue repeated open commands until the indication changes.
2
,C. Treat the breaker status as uncertain and investigate using approved
verification procedures.
D. Immediately operate the associated disconnect switch.
Answer: C. Treat the breaker status as uncertain and investigate
using approved verification procedures.
Rationale: A command is not proof that equipment actually operated.
A failed indication may represent a breaker failure, control-circuit
problem, communication failure, indication failure, or other abnormal
condition. Repeated commands or proceeding to operate associated
equipment without establishing actual status can create dangerous
conditions. Operators must verify status through approved means
before continuing.
4. Why are disconnect switches generally not used to interrupt
substantial load current unless specifically designed and authorized
for that purpose?
A. Disconnects are normally designed primarily for isolation and do not
necessarily have the interrupting capability of circuit breakers.
B. Disconnects always operate more slowly than circuit breakers.
C. Disconnects are designed only for low-voltage systems.
D. Disconnects cannot carry current under any circumstances.
Answer: A. Disconnects are normally designed primarily for
isolation and do not necessarily have the interrupting capability of
circuit breakers.
Rationale: A circuit breaker is specifically designed to interrupt
current, including fault current within its interrupting rating. A
conventional disconnect switch generally provides visible or
mechanical isolation but is not intended to interrupt significant load or
fault current. Opening a disconnect under inappropriate current
3
, conditions can produce a sustained arc, equipment damage, or severe
personnel hazards.
5. An operator is instructed to isolate a transformer for
maintenance. Which sequence represents the most important
general operating concept?
A. Open the nearest disconnect first, regardless of breaker status.
B. Establish an approved de-energization and isolation sequence, verify
the equipment is isolated, and apply required safety controls.
C. Remove protective relays before opening the transformer breaker.
D. Open all grounding connections before beginning isolation.
Answer: B. Establish an approved de-energization and isolation
sequence, verify the equipment is isolated, and apply required safety
controls.
Rationale: Transformer isolation requires controlled removal of the
equipment from service followed by positive verification and
application of appropriate safety measures. The exact sequence
depends on the station design and switching order, so the operator
must follow the applicable procedure rather than improvise. Protective
grounding and other protective measures are applied only after the
appropriate isolation and verification steps have been completed.
6. A station operator is given a switching order containing ten steps.
Why is it important to complete the steps in the prescribed sequence
rather than rearranging them for convenience?
A. The sequence is primarily intended to reduce paperwork.
B. Each step may establish or preserve a specific electrical condition
required for the next step.
4
OPERATING PROCEDURES EXAM WITH
QUESTIONS AND VERIFIED ANSWERS,
PLUS DETAILED RATIONALES/EXPERT
VERIFIED FOR GUARANTEED PASS
2026/LATEST UPDATE/INSTANT
DOWNLOAD PDF
1. During a planned switching operation, an Electric Station
Operator receives a written switching order that requires several
circuit breakers and disconnect switches to be operated in sequence.
Before beginning, the operator notices that the equipment
identification on one disconnect does not exactly match the
identification written in the order. What is the most appropriate
action?
A. Operate the device because its physical location appears correct.
B. Ask another operator to identify the device visually and then proceed.
C. Stop the switching operation and resolve the identification
discrepancy before operating anything.
D. Operate the device slowly so that an error can be detected before
completion.
Answer: C. Stop the switching operation and resolve the
identification discrepancy before operating anything.
Rationale: Correct equipment identification is fundamental to safe
switching. An operator should never rely solely on physical location,
appearance, or assumption when the identification does not agree with
the authorized switching order. A discrepancy can indicate an
incorrect device, an outdated diagram, an equipment-labeling
1
,problem, or an error in the order. Proceeding despite uncertainty
could unintentionally energize, de-energize, isolate, or ground the
wrong circuit.
2. An operator is preparing to open a circuit breaker as part of a
planned outage. The switching order specifies the breaker by station
name, bay designation, and equipment number. Which principle
should govern the operator's action?
A. Operate the device based primarily on its handle color.
B. Verify the device against the switching order and applicable station
indications before operation.
C. Operate the breaker identified by the nearest equipment tag.
D. Ask maintenance personnel which breaker is normally used and
substitute it if necessary.
Answer: B. Verify the device against the switching order and
applicable station indications before operation.
Rationale: Switching requires positive identification of the intended
equipment. Operators should correlate the written order with
equipment labels, control indications, diagrams, and other authorized
identification methods. Color, physical proximity, or informal advice is
not an adequate substitute for positive identification. Substituting
equipment without authorization can create unsafe system conditions
and invalidate the intended switching sequence.
3. A circuit breaker is commanded to open from the control panel.
The control indication does not change to the expected open status.
What should the operator do first?
A. Assume the breaker opened because the command was issued.
B. Issue repeated open commands until the indication changes.
2
,C. Treat the breaker status as uncertain and investigate using approved
verification procedures.
D. Immediately operate the associated disconnect switch.
Answer: C. Treat the breaker status as uncertain and investigate
using approved verification procedures.
Rationale: A command is not proof that equipment actually operated.
A failed indication may represent a breaker failure, control-circuit
problem, communication failure, indication failure, or other abnormal
condition. Repeated commands or proceeding to operate associated
equipment without establishing actual status can create dangerous
conditions. Operators must verify status through approved means
before continuing.
4. Why are disconnect switches generally not used to interrupt
substantial load current unless specifically designed and authorized
for that purpose?
A. Disconnects are normally designed primarily for isolation and do not
necessarily have the interrupting capability of circuit breakers.
B. Disconnects always operate more slowly than circuit breakers.
C. Disconnects are designed only for low-voltage systems.
D. Disconnects cannot carry current under any circumstances.
Answer: A. Disconnects are normally designed primarily for
isolation and do not necessarily have the interrupting capability of
circuit breakers.
Rationale: A circuit breaker is specifically designed to interrupt
current, including fault current within its interrupting rating. A
conventional disconnect switch generally provides visible or
mechanical isolation but is not intended to interrupt significant load or
fault current. Opening a disconnect under inappropriate current
3
, conditions can produce a sustained arc, equipment damage, or severe
personnel hazards.
5. An operator is instructed to isolate a transformer for
maintenance. Which sequence represents the most important
general operating concept?
A. Open the nearest disconnect first, regardless of breaker status.
B. Establish an approved de-energization and isolation sequence, verify
the equipment is isolated, and apply required safety controls.
C. Remove protective relays before opening the transformer breaker.
D. Open all grounding connections before beginning isolation.
Answer: B. Establish an approved de-energization and isolation
sequence, verify the equipment is isolated, and apply required safety
controls.
Rationale: Transformer isolation requires controlled removal of the
equipment from service followed by positive verification and
application of appropriate safety measures. The exact sequence
depends on the station design and switching order, so the operator
must follow the applicable procedure rather than improvise. Protective
grounding and other protective measures are applied only after the
appropriate isolation and verification steps have been completed.
6. A station operator is given a switching order containing ten steps.
Why is it important to complete the steps in the prescribed sequence
rather than rearranging them for convenience?
A. The sequence is primarily intended to reduce paperwork.
B. Each step may establish or preserve a specific electrical condition
required for the next step.
4
