LADWP ELECTRICAL CRAFT HELPER EXAM | COMPLETE
PRACTICE QUESTIONS AND ANSWERS 2026/2027 | A+
GRADED | COMPREHENSIVE EXAM GUIDE 2026&2027
1. A helper is asked to assist with electrical work on equipment that has not yet been
verified de-energized. What should the helper do first?
A. Begin removing the equipment cover.
B. Confirm that the equipment has been properly isolated and the required safety
procedure has been followed.
C. Ask another helper to watch the equipment.
D. Proceed if the equipment appears inactive.
Answer: B
The absence of visible activity does not establish that electrical equipment is safe. Proper
isolation and verification must occur before work begins.
2. Which electrical quantity represents the difference in electrical potential between
two points?
A. Voltage
B. Current
C. Resistance
D. Power
Answer: A
Voltage is the electrical potential difference that provides the force capable of driving current
through a circuit.
3. A circuit has a resistance of 10 ohms and a current of 2 amperes. What voltage is
present across the resistance?
A. 5 V
B. 10 V
C. 20 V
D. 40 V
Answer: C
Ohm's law states V = I × R. Therefore, 2 A × 10 Ω = 20 V.
4. Which instrument is normally used to measure electrical current in a circuit?
A. Ohmmeter
B. Voltmeter
, C. Megohmmeter
D. Ammeter
Answer: D
An ammeter measures current. Depending on the instrument and application, current may be
measured directly in series or with a current clamp.
5. A worker notices that an extension cord has exposed conductors near the plug.
What is the appropriate action?
A. Wrap the damaged area with ordinary tape and continue.
B. Remove the damaged cord from service and report it.
C. Reduce the load connected to the cord.
D. Use the cord only for low-voltage equipment.
Answer: B
Exposed conductors create shock, short-circuit, and fire hazards. Damaged electrical
equipment should be removed from service until properly repaired or replaced.
6. What is the primary purpose of a circuit breaker?
A. Increase circuit voltage
B. Store electrical energy
C. Interrupt a circuit when specified abnormal current conditions occur
D. Convert alternating current to direct current
Answer: C
A circuit breaker is designed to open a circuit under specified overcurrent or fault conditions,
helping protect conductors and equipment.
7. Which material is commonly used as an electrical conductor because of its relatively
low resistance?
A. Copper
B. Glass
C. Rubber
D. Porcelain
Answer: A
Copper has high electrical conductivity and is widely used for electrical conductors.
8. Before using a portable electrical tool, a helper should primarily inspect the tool for
which condition?
A. Manufacturer's color scheme
B. Age of the tool only
, C. Weight of the tool
D. Damaged cords, plugs, guards, or other unsafe conditions
Answer: D
A pre-use inspection can identify defects that could create shock, mechanical, or other
workplace hazards.
9. In a simple series circuit, what happens to the current through each series
component?
A. It is different through every component.
B. It is the same through each component.
C. It becomes zero after the first component.
D. It is determined only by the largest resistor.
Answer: B
Because a series circuit provides one continuous current path, the same current flows through
each series component.
10. What is the principal purpose of electrical insulation around a conductor?
A. Increase conductor weight
B. Increase current flow
C. Reduce unintended contact between the conductor and surrounding materials
D. Convert AC into DC
Answer: C
Insulation separates conductive material from people, other conductors, and conductive
surfaces, helping prevent unintended current paths.
11. A 120-V load draws 10 A. Approximately how much electrical power does it
consume?
A. 12 W
B. 120 W
C. 1,200 W
D. 12,000 W
Answer: C
For a simple resistive load, power is P = V × I, giving 120 × 10 = 1,200 watts.
12. Which condition is most likely to increase the risk of electrical shock?
A. Dry insulated gloves stored properly
B. A properly grounded enclosure
, C. A dry nonconductive work surface
D. Contact with energized equipment while standing in a wet area
Answer: D
Moisture can reduce body resistance and increase the severity of current flow through a
person.
13. What does a schematic diagram primarily show?
A. The physical appearance of equipment
B. Electrical relationships and circuit functions using symbols
C. The weight of each component
D. The manufacturer's shipping instructions
Answer: B
A schematic represents electrical relationships and functions using standardized or recognized
symbols rather than showing exact physical placement.
14. A fuse repeatedly opens when a motor is energized. What should the helper avoid
doing?
A. Reporting the repeated fault
B. Checking for obvious equipment damage when authorized
C. Installing a fuse with a higher rating simply to keep the circuit operating
D. Following the troubleshooting procedure provided by the qualified worker
Answer: C
Increasing fuse size without determining the cause can defeat circuit protection and create
overheating or fire hazards.
15. Which tool is most appropriate for tightening a terminal connection to a specified
manufacturer torque?
A. Torque wrench or torque screwdriver appropriate for the application
B. Pipe wrench
C. Pry bar
D. Adjustable wrench used without reference to the specification
Answer: A
Specified torque helps establish a reliable electrical and mechanical connection without
damaging the terminal or conductor.
16. A helper is instructed to carry a long conductive ladder near overhead electrical
lines. What is the safest general approach?
A. Carry it horizontally at shoulder height.
PRACTICE QUESTIONS AND ANSWERS 2026/2027 | A+
GRADED | COMPREHENSIVE EXAM GUIDE 2026&2027
1. A helper is asked to assist with electrical work on equipment that has not yet been
verified de-energized. What should the helper do first?
A. Begin removing the equipment cover.
B. Confirm that the equipment has been properly isolated and the required safety
procedure has been followed.
C. Ask another helper to watch the equipment.
D. Proceed if the equipment appears inactive.
Answer: B
The absence of visible activity does not establish that electrical equipment is safe. Proper
isolation and verification must occur before work begins.
2. Which electrical quantity represents the difference in electrical potential between
two points?
A. Voltage
B. Current
C. Resistance
D. Power
Answer: A
Voltage is the electrical potential difference that provides the force capable of driving current
through a circuit.
3. A circuit has a resistance of 10 ohms and a current of 2 amperes. What voltage is
present across the resistance?
A. 5 V
B. 10 V
C. 20 V
D. 40 V
Answer: C
Ohm's law states V = I × R. Therefore, 2 A × 10 Ω = 20 V.
4. Which instrument is normally used to measure electrical current in a circuit?
A. Ohmmeter
B. Voltmeter
, C. Megohmmeter
D. Ammeter
Answer: D
An ammeter measures current. Depending on the instrument and application, current may be
measured directly in series or with a current clamp.
5. A worker notices that an extension cord has exposed conductors near the plug.
What is the appropriate action?
A. Wrap the damaged area with ordinary tape and continue.
B. Remove the damaged cord from service and report it.
C. Reduce the load connected to the cord.
D. Use the cord only for low-voltage equipment.
Answer: B
Exposed conductors create shock, short-circuit, and fire hazards. Damaged electrical
equipment should be removed from service until properly repaired or replaced.
6. What is the primary purpose of a circuit breaker?
A. Increase circuit voltage
B. Store electrical energy
C. Interrupt a circuit when specified abnormal current conditions occur
D. Convert alternating current to direct current
Answer: C
A circuit breaker is designed to open a circuit under specified overcurrent or fault conditions,
helping protect conductors and equipment.
7. Which material is commonly used as an electrical conductor because of its relatively
low resistance?
A. Copper
B. Glass
C. Rubber
D. Porcelain
Answer: A
Copper has high electrical conductivity and is widely used for electrical conductors.
8. Before using a portable electrical tool, a helper should primarily inspect the tool for
which condition?
A. Manufacturer's color scheme
B. Age of the tool only
, C. Weight of the tool
D. Damaged cords, plugs, guards, or other unsafe conditions
Answer: D
A pre-use inspection can identify defects that could create shock, mechanical, or other
workplace hazards.
9. In a simple series circuit, what happens to the current through each series
component?
A. It is different through every component.
B. It is the same through each component.
C. It becomes zero after the first component.
D. It is determined only by the largest resistor.
Answer: B
Because a series circuit provides one continuous current path, the same current flows through
each series component.
10. What is the principal purpose of electrical insulation around a conductor?
A. Increase conductor weight
B. Increase current flow
C. Reduce unintended contact between the conductor and surrounding materials
D. Convert AC into DC
Answer: C
Insulation separates conductive material from people, other conductors, and conductive
surfaces, helping prevent unintended current paths.
11. A 120-V load draws 10 A. Approximately how much electrical power does it
consume?
A. 12 W
B. 120 W
C. 1,200 W
D. 12,000 W
Answer: C
For a simple resistive load, power is P = V × I, giving 120 × 10 = 1,200 watts.
12. Which condition is most likely to increase the risk of electrical shock?
A. Dry insulated gloves stored properly
B. A properly grounded enclosure
, C. A dry nonconductive work surface
D. Contact with energized equipment while standing in a wet area
Answer: D
Moisture can reduce body resistance and increase the severity of current flow through a
person.
13. What does a schematic diagram primarily show?
A. The physical appearance of equipment
B. Electrical relationships and circuit functions using symbols
C. The weight of each component
D. The manufacturer's shipping instructions
Answer: B
A schematic represents electrical relationships and functions using standardized or recognized
symbols rather than showing exact physical placement.
14. A fuse repeatedly opens when a motor is energized. What should the helper avoid
doing?
A. Reporting the repeated fault
B. Checking for obvious equipment damage when authorized
C. Installing a fuse with a higher rating simply to keep the circuit operating
D. Following the troubleshooting procedure provided by the qualified worker
Answer: C
Increasing fuse size without determining the cause can defeat circuit protection and create
overheating or fire hazards.
15. Which tool is most appropriate for tightening a terminal connection to a specified
manufacturer torque?
A. Torque wrench or torque screwdriver appropriate for the application
B. Pipe wrench
C. Pry bar
D. Adjustable wrench used without reference to the specification
Answer: A
Specified torque helps establish a reliable electrical and mechanical connection without
damaging the terminal or conductor.
16. A helper is instructed to carry a long conductive ladder near overhead electrical
lines. What is the safest general approach?
A. Carry it horizontally at shoulder height.
