___________________________________________________________________
Apprentice Electrician Licensing
Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A Instant Download Pdf
___________________________________________________________________
1. What is the primary purpose of an overcurrent protective device such as a
fuse or circuit breaker?
A. To increase circuit voltage
B. To protect conductors from excessive current
C. To improve power factor
D. To reduce resistance
Answer: B. To protect conductors from excessive current
Rationale: Overcurrent protective devices open a circuit when current exceeds a
safe level, helping prevent conductor overheating, equipment damage, and fire.
2. Which unit is used to measure electrical current?
A. Volt
B. Ohm
C. Ampere
D. Watt
Answer: C. Ampere
Rationale: An ampere (amp) is the standard unit used to measure the flow of
electric current.
, 3. Which unit measures electrical resistance?
A. Volt
B. Ohm
C. Watt
D. Ampere
Answer: B. Ohm
Rationale: Resistance is measured in ohms (Ω), which indicates how strongly a
material opposes current flow.
4. What does Ohm’s Law state?
A. P = I × R
B. V = I × R
C. R = V × P
D. I = V × P
Answer: B. V = I × R
Rationale: Ohm’s Law establishes the relationship between voltage, current,
and resistance: voltage equals current multiplied by resistance.
5. A 120-volt circuit has a resistance of 20 ohms. Approximately how much
current flows?
A. 2 A
B. 4 A
C. 6 A
D. 10 A
Answer: C. 6 A
Rationale: Using I = V/R, the current is 120 ÷ 20 = 6 amperes.
6. What is the purpose of the equipment grounding conductor?
,A. To carry normal circuit current
B. To provide a low-impedance path for fault current
C. To increase circuit voltage
D. To replace the neutral conductor
Answer: B. To provide a low-impedance path for fault current
Rationale: The equipment grounding conductor provides a path for fault current
so the overcurrent protective device can operate and disconnect the faulted
circuit.
7. Which conductor normally carries current back to the source in a typical
single-phase circuit?
A. Equipment grounding conductor
B. Bonding jumper
C. Neutral conductor
D. Grounding electrode conductor
Answer: C. Neutral conductor
Rationale: In a typical line-to-neutral circuit, the neutral conductor provides the
normal return path for current to the source.
8. What is the main function of insulation on an electrical conductor?
A. Increase current flow
B. Prevent unintended contact with the conductor
C. Increase conductor resistance intentionally
D. Provide mechanical switching
Answer: B. Prevent unintended contact with the conductor
Rationale: Electrical insulation helps prevent accidental contact, short circuits,
leakage current, and unwanted current paths.
9. Which device is designed to protect people from electric shock caused by
ground-fault current?
, A. Standard fuse
B. GFCI
C. Transformer
D. Disconnect switch
Answer: B. GFCI
Rationale: A ground-fault circuit interrupter detects an imbalance between
current leaving and returning on circuit conductors and quickly interrupts the
circuit.
10.What does GFCI stand for?
A. Ground-Fault Circuit Interrupter
B. Grounded-Fuse Circuit Indicator
C. General Fault Current Insulator
D. Ground-Frequency Circuit Interlock
Answer: A. Ground-Fault Circuit Interrupter
Rationale: GFCI is the abbreviation for Ground-Fault Circuit Interrupter, a device
intended to provide protection against certain ground-fault shock hazards.
11.What is the primary purpose of an electrical disconnect?
A. To increase available current
B. To provide a means of disconnecting power from equipment
C. To reduce conductor size
D. To replace circuit protection
Answer: B. To provide a means of disconnecting power from equipment
Rationale: A disconnecting means allows equipment or circuits to be isolated
from their source for operation, maintenance, or servicing.
12.Which tool is commonly used to measure voltage?
Apprentice Electrician Licensing
Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A Instant Download Pdf
___________________________________________________________________
1. What is the primary purpose of an overcurrent protective device such as a
fuse or circuit breaker?
A. To increase circuit voltage
B. To protect conductors from excessive current
C. To improve power factor
D. To reduce resistance
Answer: B. To protect conductors from excessive current
Rationale: Overcurrent protective devices open a circuit when current exceeds a
safe level, helping prevent conductor overheating, equipment damage, and fire.
2. Which unit is used to measure electrical current?
A. Volt
B. Ohm
C. Ampere
D. Watt
Answer: C. Ampere
Rationale: An ampere (amp) is the standard unit used to measure the flow of
electric current.
, 3. Which unit measures electrical resistance?
A. Volt
B. Ohm
C. Watt
D. Ampere
Answer: B. Ohm
Rationale: Resistance is measured in ohms (Ω), which indicates how strongly a
material opposes current flow.
4. What does Ohm’s Law state?
A. P = I × R
B. V = I × R
C. R = V × P
D. I = V × P
Answer: B. V = I × R
Rationale: Ohm’s Law establishes the relationship between voltage, current,
and resistance: voltage equals current multiplied by resistance.
5. A 120-volt circuit has a resistance of 20 ohms. Approximately how much
current flows?
A. 2 A
B. 4 A
C. 6 A
D. 10 A
Answer: C. 6 A
Rationale: Using I = V/R, the current is 120 ÷ 20 = 6 amperes.
6. What is the purpose of the equipment grounding conductor?
,A. To carry normal circuit current
B. To provide a low-impedance path for fault current
C. To increase circuit voltage
D. To replace the neutral conductor
Answer: B. To provide a low-impedance path for fault current
Rationale: The equipment grounding conductor provides a path for fault current
so the overcurrent protective device can operate and disconnect the faulted
circuit.
7. Which conductor normally carries current back to the source in a typical
single-phase circuit?
A. Equipment grounding conductor
B. Bonding jumper
C. Neutral conductor
D. Grounding electrode conductor
Answer: C. Neutral conductor
Rationale: In a typical line-to-neutral circuit, the neutral conductor provides the
normal return path for current to the source.
8. What is the main function of insulation on an electrical conductor?
A. Increase current flow
B. Prevent unintended contact with the conductor
C. Increase conductor resistance intentionally
D. Provide mechanical switching
Answer: B. Prevent unintended contact with the conductor
Rationale: Electrical insulation helps prevent accidental contact, short circuits,
leakage current, and unwanted current paths.
9. Which device is designed to protect people from electric shock caused by
ground-fault current?
, A. Standard fuse
B. GFCI
C. Transformer
D. Disconnect switch
Answer: B. GFCI
Rationale: A ground-fault circuit interrupter detects an imbalance between
current leaving and returning on circuit conductors and quickly interrupts the
circuit.
10.What does GFCI stand for?
A. Ground-Fault Circuit Interrupter
B. Grounded-Fuse Circuit Indicator
C. General Fault Current Insulator
D. Ground-Frequency Circuit Interlock
Answer: A. Ground-Fault Circuit Interrupter
Rationale: GFCI is the abbreviation for Ground-Fault Circuit Interrupter, a device
intended to provide protection against certain ground-fault shock hazards.
11.What is the primary purpose of an electrical disconnect?
A. To increase available current
B. To provide a means of disconnecting power from equipment
C. To reduce conductor size
D. To replace circuit protection
Answer: B. To provide a means of disconnecting power from equipment
Rationale: A disconnecting means allows equipment or circuits to be isolated
from their source for operation, maintenance, or servicing.
12.Which tool is commonly used to measure voltage?
