LADWP ELECTRICAL CRAFT HELPER ULTIMATE PRACTICE
EXAMINATION COMPLETE QUESTIONS AND DETAILED
SOLUTIONS LATEST UPDATE THIS YEAR JUST RELEASED
Question 1
Before an Electrical Craft Helper begins assisting with electrical equipment
that may contain hazardous energy, what should be established first?
A. The equipment is physically clean
B. The circuit has been properly de-energized and made safe
C. The supervisor has left the work area
D. The equipment has been operating for at least ten minutes
Answer: B
Rationale: Electrical work must begin only after appropriate safety
procedures have established that hazardous energy has been controlled.
Verification of de-energization is especially important because simply
opening a switch does not necessarily prove that the circuit is safe.
Question 2
Why should an Electrical Craft Helper never assume that a conductor is de-
energized merely because a disconnect switch appears to be open?
A. Open switches always increase circuit voltage
B. The switch may be defective, incorrectly identified, or not isolate every
energy source
,C. Electrical conductors automatically recharge from the ground
D. Disconnect switches are designed only for mechanical equipment
Answer: B
Rationale: An open disconnect does not by itself prove absence of voltage.
Proper identification, isolation, lockout/tagout when applicable, and testing
with suitable equipment are necessary before treating conductors as safe.
Question 3
When working around electrical conductors, which condition generally
creates the greatest concern for increasing shock risk?
A. Dry insulating gloves
B. A dry wooden work surface
C. Moisture that reduces body resistance
D. Properly rated insulated tools
Answer: C
Rationale: Moisture can significantly reduce the resistance of the skin and
surrounding surfaces, allowing more current to flow through the body. This
is why wet conditions require additional precautions.
Question 4
An electrical helper observes that a coworker is about to begin work without
completing the required safety procedure. What is the most appropriate
response?
,A. Ignore the situation because the coworker is more experienced
B. Proceed with the work but stand farther away
C. Stop or alert the coworker and notify the responsible supervisor as
appropriate
D. Leave the worksite without informing anyone
Answer: C
Rationale: Safety is a shared responsibility. A helper should recognize
hazardous conditions and communicate them promptly rather than
knowingly allowing unsafe work to continue.
Question 5
Which device is primarily intended to provide overcurrent protection by
opening a circuit when excessive current persists?
A. Transformer
B. Fuse or circuit breaker
C. Receptacle cover
D. Terminal block
Answer: B
Rationale: Fuses and circuit breakers are overcurrent protective devices.
They interrupt current when a fault or excessive load reaches the device's
operating threshold.
Question 6
What is the primary purpose of personal protective equipment during
electrical construction or maintenance work?
, A. To eliminate every electrical hazard
B. To replace proper training and procedures
C. To reduce exposure to hazards that cannot otherwise be adequately
controlled
D. To allow workers to ignore energized equipment
Answer: C
Rationale: PPE is one part of a comprehensive safety program. It does not
eliminate the hazard and should never substitute for de-energization,
engineering controls, safe procedures, or appropriate training.
Question 7
Which electrical quantity represents the opposition that a material or
component presents to current flow?
A. Voltage
B. Resistance
C. Frequency
D. Power factor
Answer: B
Rationale: Resistance is measured in ohms and represents opposition to
current flow. Different materials and components have different resistance
characteristics.
Question 8
A circuit has a voltage of 120 volts and resistance of 20 ohms. Using Ohm's
law, what current should theoretically flow?
EXAMINATION COMPLETE QUESTIONS AND DETAILED
SOLUTIONS LATEST UPDATE THIS YEAR JUST RELEASED
Question 1
Before an Electrical Craft Helper begins assisting with electrical equipment
that may contain hazardous energy, what should be established first?
A. The equipment is physically clean
B. The circuit has been properly de-energized and made safe
C. The supervisor has left the work area
D. The equipment has been operating for at least ten minutes
Answer: B
Rationale: Electrical work must begin only after appropriate safety
procedures have established that hazardous energy has been controlled.
Verification of de-energization is especially important because simply
opening a switch does not necessarily prove that the circuit is safe.
Question 2
Why should an Electrical Craft Helper never assume that a conductor is de-
energized merely because a disconnect switch appears to be open?
A. Open switches always increase circuit voltage
B. The switch may be defective, incorrectly identified, or not isolate every
energy source
,C. Electrical conductors automatically recharge from the ground
D. Disconnect switches are designed only for mechanical equipment
Answer: B
Rationale: An open disconnect does not by itself prove absence of voltage.
Proper identification, isolation, lockout/tagout when applicable, and testing
with suitable equipment are necessary before treating conductors as safe.
Question 3
When working around electrical conductors, which condition generally
creates the greatest concern for increasing shock risk?
A. Dry insulating gloves
B. A dry wooden work surface
C. Moisture that reduces body resistance
D. Properly rated insulated tools
Answer: C
Rationale: Moisture can significantly reduce the resistance of the skin and
surrounding surfaces, allowing more current to flow through the body. This
is why wet conditions require additional precautions.
Question 4
An electrical helper observes that a coworker is about to begin work without
completing the required safety procedure. What is the most appropriate
response?
,A. Ignore the situation because the coworker is more experienced
B. Proceed with the work but stand farther away
C. Stop or alert the coworker and notify the responsible supervisor as
appropriate
D. Leave the worksite without informing anyone
Answer: C
Rationale: Safety is a shared responsibility. A helper should recognize
hazardous conditions and communicate them promptly rather than
knowingly allowing unsafe work to continue.
Question 5
Which device is primarily intended to provide overcurrent protection by
opening a circuit when excessive current persists?
A. Transformer
B. Fuse or circuit breaker
C. Receptacle cover
D. Terminal block
Answer: B
Rationale: Fuses and circuit breakers are overcurrent protective devices.
They interrupt current when a fault or excessive load reaches the device's
operating threshold.
Question 6
What is the primary purpose of personal protective equipment during
electrical construction or maintenance work?
, A. To eliminate every electrical hazard
B. To replace proper training and procedures
C. To reduce exposure to hazards that cannot otherwise be adequately
controlled
D. To allow workers to ignore energized equipment
Answer: C
Rationale: PPE is one part of a comprehensive safety program. It does not
eliminate the hazard and should never substitute for de-energization,
engineering controls, safe procedures, or appropriate training.
Question 7
Which electrical quantity represents the opposition that a material or
component presents to current flow?
A. Voltage
B. Resistance
C. Frequency
D. Power factor
Answer: B
Rationale: Resistance is measured in ohms and represents opposition to
current flow. Different materials and components have different resistance
characteristics.
Question 8
A circuit has a voltage of 120 volts and resistance of 20 ohms. Using Ohm's
law, what current should theoretically flow?
