LADWP ELECTRICAL CRAFT HELPER EXAM
— CLASS 3799 LADWP ELECTRICIAN EXAM
— CLASS 3863 NEWEST EVALUATED EXAM
PRACTICE QUESTIONS 2025 2026|
ORIGINAL QUESTIONS & ANSWERS |
DETAILED RATIONALES |*HINTED*
COMPLETE EXAM PREP GRADED A+
**INSTANT DOWNLOAD PDF**
1. A 120-volt single-phase circuit supplies a 12-ohm resistive load. What
current should the circuit draw under normal conditions?
A. 5 A
B. 8 A
Answer: 10 A
D. 12 A
Using Ohm’s law, I = E/R = 120/12 = 10 amperes.
2. A technician measures 240 volts across two energized conductors and 0
volts between either conductor and the equipment grounding conductor.
What is the most likely concern?
A. The circuit is properly grounded
Answer: The grounding reference should be investigated
C. The conductors are automatically de-energized
D. The circuit contains excessive resistance
,The voltage relationship does not establish that the circuit is safely grounded. The
grounding and bonding system must be verified before work proceeds.
3. Before working inside an electrical enclosure, the most important first step
is to:
A. Remove the enclosure cover
B. Put on insulated gloves only
Answer: Identify, isolate, and verify the energy source
D. Begin testing individual components
Electrical energy must be controlled before exposure to energized parts.
Verification with an appropriate test instrument is essential.
4. A 20-ampere circuit contains a continuous load of 16 amperes. Which
condition is most appropriate for a properly designed circuit?
A. A 15-ampere breaker should be used
B. A 16-ampere fuse should be used
C. A 20-ampere breaker is always sufficient
Answer: The continuous load must be evaluated using the applicable
continuous-load requirements
Continuous electrical loads require additional capacity under applicable electrical
requirements; simply matching breaker rating to measured load is not sufficient.
5. Which instrument is specifically designed to measure electrical resistance?
A. Ammeter
B. Voltmeter
Answer: Ohmmeter
D. Frequency meter
An ohmmeter measures resistance, normally with the circuit de-energized.
6. An electrician needs to determine whether a conductor is carrying current
without disconnecting it. Which instrument is most appropriate?
, A. Megohmmeter
Answer: Clamp ammeter
C. Continuity tester
D. Ohmmeter
A clamp ammeter measures current through the magnetic field surrounding a
conductor without requiring the conductor to be disconnected.
7. A fuse repeatedly opens when a motor is started. Which condition should
be investigated first?
A. Paint color on the motor
B. Conductor identification only
Answer: Starting current, motor condition, and circuit protection
D. The enclosure finish
Motor starting current can be substantially higher than running current. Repeated
fuse operation requires investigation of both the motor and protection system.
8. Which condition creates the greatest immediate electrical shock hazard?
A. A de-energized properly grounded conductor
B. A labeled spare conductor
C. An insulated conductor inside an enclosure
Answer: An exposed energized conductor
Contact with an exposed energized conductor can establish a path for current
through a person.
9. A 120-volt heater draws 10 amperes. Approximately how much electrical
power does it consume?
A. 12 W
B. 120 W
Answer: 1,200 W
D. 12,000 W
Power is P = E × I. Therefore, 120 × 10 = 1,200 watts.
— CLASS 3799 LADWP ELECTRICIAN EXAM
— CLASS 3863 NEWEST EVALUATED EXAM
PRACTICE QUESTIONS 2025 2026|
ORIGINAL QUESTIONS & ANSWERS |
DETAILED RATIONALES |*HINTED*
COMPLETE EXAM PREP GRADED A+
**INSTANT DOWNLOAD PDF**
1. A 120-volt single-phase circuit supplies a 12-ohm resistive load. What
current should the circuit draw under normal conditions?
A. 5 A
B. 8 A
Answer: 10 A
D. 12 A
Using Ohm’s law, I = E/R = 120/12 = 10 amperes.
2. A technician measures 240 volts across two energized conductors and 0
volts between either conductor and the equipment grounding conductor.
What is the most likely concern?
A. The circuit is properly grounded
Answer: The grounding reference should be investigated
C. The conductors are automatically de-energized
D. The circuit contains excessive resistance
,The voltage relationship does not establish that the circuit is safely grounded. The
grounding and bonding system must be verified before work proceeds.
3. Before working inside an electrical enclosure, the most important first step
is to:
A. Remove the enclosure cover
B. Put on insulated gloves only
Answer: Identify, isolate, and verify the energy source
D. Begin testing individual components
Electrical energy must be controlled before exposure to energized parts.
Verification with an appropriate test instrument is essential.
4. A 20-ampere circuit contains a continuous load of 16 amperes. Which
condition is most appropriate for a properly designed circuit?
A. A 15-ampere breaker should be used
B. A 16-ampere fuse should be used
C. A 20-ampere breaker is always sufficient
Answer: The continuous load must be evaluated using the applicable
continuous-load requirements
Continuous electrical loads require additional capacity under applicable electrical
requirements; simply matching breaker rating to measured load is not sufficient.
5. Which instrument is specifically designed to measure electrical resistance?
A. Ammeter
B. Voltmeter
Answer: Ohmmeter
D. Frequency meter
An ohmmeter measures resistance, normally with the circuit de-energized.
6. An electrician needs to determine whether a conductor is carrying current
without disconnecting it. Which instrument is most appropriate?
, A. Megohmmeter
Answer: Clamp ammeter
C. Continuity tester
D. Ohmmeter
A clamp ammeter measures current through the magnetic field surrounding a
conductor without requiring the conductor to be disconnected.
7. A fuse repeatedly opens when a motor is started. Which condition should
be investigated first?
A. Paint color on the motor
B. Conductor identification only
Answer: Starting current, motor condition, and circuit protection
D. The enclosure finish
Motor starting current can be substantially higher than running current. Repeated
fuse operation requires investigation of both the motor and protection system.
8. Which condition creates the greatest immediate electrical shock hazard?
A. A de-energized properly grounded conductor
B. A labeled spare conductor
C. An insulated conductor inside an enclosure
Answer: An exposed energized conductor
Contact with an exposed energized conductor can establish a path for current
through a person.
9. A 120-volt heater draws 10 amperes. Approximately how much electrical
power does it consume?
A. 12 W
B. 120 W
Answer: 1,200 W
D. 12,000 W
Power is P = E × I. Therefore, 120 × 10 = 1,200 watts.
