LADWP ELECTRICAL CRAFT HELPER EXAM CLASS-3799
WITH ACTUAL QUESTIONS AND VERIFIED ANSWERS, PLUS
EXPLAINED RATIONALES/EXPERT VERIFIED FOR
GUARANTEED 100% PASS 2026/LATEST UPDATE/INSTANT
DOWNLOAD PDF
Question 1. What is the primary purpose of a lockout/tagout procedure?
A. To increase equipment efficiency
B. To prevent unauthorized operation of hazardous equipment during maintenance
C. To test electrical circuits for voltage
D. To ground electrical equipment
Correct Answer: B
Rationale:
Lockout/tagout (LOTO) is a safety procedure used to ensure that dangerous machines
are properly shut off and not able to be started up again prior to the completion of
maintenance or repair work. It prevents unauthorized operation (B). It does not increase
efficiency (A), test circuits (C), or ground equipment (D).
Question 2. Which of the following is the correct formula for Ohm's Law?
A. V = I × R
B. V = I / R
C. V = R / I
D. V = I + R
Correct Answer: A
,Rationale:
Ohm's Law states that voltage (V) equals current (I) multiplied by resistance (R). Options
B, C, and D are incorrect rearrangements.
Question 3. What is the unit of electrical current?
A. Volt
B. Ampere
C. Ohm
D. Watt
Correct Answer: B
Rationale:
The ampere (amp) is the unit of electrical current. Volt (A) is voltage. Ohm (C) is
resistance. Watt (D) is power.
Question 4. A worker needs to measure voltage in a circuit. Which tool should be
used?
A. Multimeter
B. Wire stripper
C. Pipe wrench
D. Hammer
Correct Answer: A
Rationale:
A multimeter measures voltage, current, and resistance. Wire stripper (B) strips
insulation. Pipe wrench (C) is for plumbing. Hammer (D) is for driving nails.
Question 5. What is the first step when responding to an electrical shock victim?
A. Call 911
B. Turn off the power source
,C. Check for breathing
D. Start CPR
Correct Answer: B
Rationale:
The first step is to turn off the power source to prevent further injury to the victim and
rescuer. Calling 911 (A) is important but after ensuring safety. Checking breathing (C)
and CPR (D) come after the power is off.
Question 6. What is the primary function of a fuse in an electrical circuit?
A. To increase voltage
B. To protect the circuit from overcurrent
C. To store energy
D. To convert AC to DC
Correct Answer: B
Rationale:
A fuse melts and breaks the circuit when current exceeds a safe level, protecting the
circuit. It does not increase voltage (A), store energy (C), or convert AC to DC (D).
Question 7. Which of the following is a non-conductive material?
A. Copper
B. Aluminum
C. Rubber
D. Steel
Correct Answer: C
Rationale:
Rubber is an insulator and does not conduct electricity. Copper (A), aluminum (B), and
steel (D) are conductors.
, Question 8. What is the formula for electrical power?
A. P = V × I
B. P = V / I
C. P = I / V
D. P = V + I
Correct Answer: A
Rationale:
Power (P) equals voltage (V) multiplied by current (I). Options B, C, and D are incorrect.
Question 9. What does AC stand for in electrical terms?
A. Alternating Current
B. Active Current
C. Average Current
D. Amplified Current
Correct Answer: A
Rationale:
AC stands for Alternating Current, which reverses direction periodically. The other
options are incorrect.
Question 10. What is the purpose of grounding an electrical system?
A. To increase voltage
B. To provide a safe path for fault current
C. To reduce resistance
D. To increase current
Correct Answer: B
WITH ACTUAL QUESTIONS AND VERIFIED ANSWERS, PLUS
EXPLAINED RATIONALES/EXPERT VERIFIED FOR
GUARANTEED 100% PASS 2026/LATEST UPDATE/INSTANT
DOWNLOAD PDF
Question 1. What is the primary purpose of a lockout/tagout procedure?
A. To increase equipment efficiency
B. To prevent unauthorized operation of hazardous equipment during maintenance
C. To test electrical circuits for voltage
D. To ground electrical equipment
Correct Answer: B
Rationale:
Lockout/tagout (LOTO) is a safety procedure used to ensure that dangerous machines
are properly shut off and not able to be started up again prior to the completion of
maintenance or repair work. It prevents unauthorized operation (B). It does not increase
efficiency (A), test circuits (C), or ground equipment (D).
Question 2. Which of the following is the correct formula for Ohm's Law?
A. V = I × R
B. V = I / R
C. V = R / I
D. V = I + R
Correct Answer: A
,Rationale:
Ohm's Law states that voltage (V) equals current (I) multiplied by resistance (R). Options
B, C, and D are incorrect rearrangements.
Question 3. What is the unit of electrical current?
A. Volt
B. Ampere
C. Ohm
D. Watt
Correct Answer: B
Rationale:
The ampere (amp) is the unit of electrical current. Volt (A) is voltage. Ohm (C) is
resistance. Watt (D) is power.
Question 4. A worker needs to measure voltage in a circuit. Which tool should be
used?
A. Multimeter
B. Wire stripper
C. Pipe wrench
D. Hammer
Correct Answer: A
Rationale:
A multimeter measures voltage, current, and resistance. Wire stripper (B) strips
insulation. Pipe wrench (C) is for plumbing. Hammer (D) is for driving nails.
Question 5. What is the first step when responding to an electrical shock victim?
A. Call 911
B. Turn off the power source
,C. Check for breathing
D. Start CPR
Correct Answer: B
Rationale:
The first step is to turn off the power source to prevent further injury to the victim and
rescuer. Calling 911 (A) is important but after ensuring safety. Checking breathing (C)
and CPR (D) come after the power is off.
Question 6. What is the primary function of a fuse in an electrical circuit?
A. To increase voltage
B. To protect the circuit from overcurrent
C. To store energy
D. To convert AC to DC
Correct Answer: B
Rationale:
A fuse melts and breaks the circuit when current exceeds a safe level, protecting the
circuit. It does not increase voltage (A), store energy (C), or convert AC to DC (D).
Question 7. Which of the following is a non-conductive material?
A. Copper
B. Aluminum
C. Rubber
D. Steel
Correct Answer: C
Rationale:
Rubber is an insulator and does not conduct electricity. Copper (A), aluminum (B), and
steel (D) are conductors.
, Question 8. What is the formula for electrical power?
A. P = V × I
B. P = V / I
C. P = I / V
D. P = V + I
Correct Answer: A
Rationale:
Power (P) equals voltage (V) multiplied by current (I). Options B, C, and D are incorrect.
Question 9. What does AC stand for in electrical terms?
A. Alternating Current
B. Active Current
C. Average Current
D. Amplified Current
Correct Answer: A
Rationale:
AC stands for Alternating Current, which reverses direction periodically. The other
options are incorrect.
Question 10. What is the purpose of grounding an electrical system?
A. To increase voltage
B. To provide a safe path for fault current
C. To reduce resistance
D. To increase current
Correct Answer: B
