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Hawaii Electrician Apprentice
Qualification Advanced 100-Question
Practice Exam 2026 | Questions &
Answers with Detailed Rationales |
Complete Exam Prep & Study Guide
1. A 120/240-volt single-phase circuit supplies a continuous load of 16
amperes. What is the minimum branch-circuit rating required when the
continuous load is calculated at 125%?
A. 16 A
B. 18 A
C. 20 A
D. 25 A
Answer: 20 A
Rationale: A continuous load is multiplied by 125%. Sixteen amperes × 1.25 = 20
amperes, so a 20-ampere circuit is required.
2. What is the primary purpose of an equipment grounding conductor?
A. To carry normal load current
B. To increase circuit voltage
C. To provide a low-impedance fault-current path
D. To reduce conductor resistance
Answer: To provide a low-impedance fault-current path
,Rationale: The equipment grounding conductor provides a path for fault current
so the overcurrent protective device can operate quickly and disconnect the
faulted circuit.
3. A 120-volt load draws 12 amperes. What is its approximate resistance?
A. 5 Ω
B. 10 Ω
C. 12 Ω
D. 20 Ω
Answer: 10 Ω
Rationale: Ohm’s law gives R = E ÷ I. Therefore, 120 ÷ 12 = 10 ohms.
4. Which device is primarily intended to protect people from electric shock
caused by ground-fault current?
A. AFCI
B. GFCI
C. Disconnect switch
D. Thermal overload relay
Answer: GFCI
Rationale: A ground-fault circuit interrupter detects an imbalance between
current leaving and returning through the circuit and rapidly interrupts power.
5. What is the electrical power consumed by a 240-volt heater drawing 15
amperes?
A. 1,600 W
B. 2,400 W
C. 3,600 W
D. 4,800 W
Answer: 3,600 W
,Rationale: Power is calculated using P = E × I. Thus, 240 × 15 = 3,600 watts.
6. Which conductor is normally identified by white or gray insulation in a
typical AC wiring system?
A. Ungrounded conductor
B. Grounded conductor
C. Equipment grounding conductor
D. Switch leg only
Answer: Grounded conductor
Rationale: The grounded conductor, commonly called the neutral, is generally
identified by white or gray insulation.
7. What is the principal danger associated with an overloaded conductor?
A. Excessive cooling
B. Reduced magnetic field
C. Overheating and possible fire
D. Increased insulation strength
Answer: Overheating and possible fire
Rationale: Excessive current causes conductor heating. Prolonged overheating
can damage insulation and create a fire hazard.
8. A 20-ampere branch circuit supplies receptacles in a location requiring GFCI
protection. Which device provides the required personnel protection?
A. Standard receptacle
B. GFCI device
C. Circuit breaker without ground-fault protection
D. Transformer
Answer: GFCI device
, Rationale: GFCI protection is intended to reduce the risk of severe electric shock
by interrupting ground-fault current.
9. What is the purpose of an overcurrent protective device?
A. Increase conductor ampacity
B. Protect conductors and equipment from excessive current
C. Stabilize utility frequency
D. Increase power factor
Answer: Protect conductors and equipment from excessive current
Rationale: Fuses and circuit breakers are designed to interrupt excessive current
before conductors or equipment are damaged.
10.Which formula correctly expresses Ohm’s law?
A. P = E × I
B. E = I × R
C. R = P × I
D. I = P × R
Answer: E = I × R
Rationale: Ohm’s law states that voltage equals current multiplied by
resistance.
11.A 120-volt circuit supplies a 1,500-watt resistive load. Approximately how
much current does the load draw?
A. 8.0 A
B. 10.0 A
C. 12.5 A
D. 15.0 A
Answer: 12.5 A
Rationale: I = P ÷ E. Therefore, 1,500 ÷ 120 = 12.5 amperes.
Hawaii Electrician Apprentice
Qualification Advanced 100-Question
Practice Exam 2026 | Questions &
Answers with Detailed Rationales |
Complete Exam Prep & Study Guide
1. A 120/240-volt single-phase circuit supplies a continuous load of 16
amperes. What is the minimum branch-circuit rating required when the
continuous load is calculated at 125%?
A. 16 A
B. 18 A
C. 20 A
D. 25 A
Answer: 20 A
Rationale: A continuous load is multiplied by 125%. Sixteen amperes × 1.25 = 20
amperes, so a 20-ampere circuit is required.
2. What is the primary purpose of an equipment grounding conductor?
A. To carry normal load current
B. To increase circuit voltage
C. To provide a low-impedance fault-current path
D. To reduce conductor resistance
Answer: To provide a low-impedance fault-current path
,Rationale: The equipment grounding conductor provides a path for fault current
so the overcurrent protective device can operate quickly and disconnect the
faulted circuit.
3. A 120-volt load draws 12 amperes. What is its approximate resistance?
A. 5 Ω
B. 10 Ω
C. 12 Ω
D. 20 Ω
Answer: 10 Ω
Rationale: Ohm’s law gives R = E ÷ I. Therefore, 120 ÷ 12 = 10 ohms.
4. Which device is primarily intended to protect people from electric shock
caused by ground-fault current?
A. AFCI
B. GFCI
C. Disconnect switch
D. Thermal overload relay
Answer: GFCI
Rationale: A ground-fault circuit interrupter detects an imbalance between
current leaving and returning through the circuit and rapidly interrupts power.
5. What is the electrical power consumed by a 240-volt heater drawing 15
amperes?
A. 1,600 W
B. 2,400 W
C. 3,600 W
D. 4,800 W
Answer: 3,600 W
,Rationale: Power is calculated using P = E × I. Thus, 240 × 15 = 3,600 watts.
6. Which conductor is normally identified by white or gray insulation in a
typical AC wiring system?
A. Ungrounded conductor
B. Grounded conductor
C. Equipment grounding conductor
D. Switch leg only
Answer: Grounded conductor
Rationale: The grounded conductor, commonly called the neutral, is generally
identified by white or gray insulation.
7. What is the principal danger associated with an overloaded conductor?
A. Excessive cooling
B. Reduced magnetic field
C. Overheating and possible fire
D. Increased insulation strength
Answer: Overheating and possible fire
Rationale: Excessive current causes conductor heating. Prolonged overheating
can damage insulation and create a fire hazard.
8. A 20-ampere branch circuit supplies receptacles in a location requiring GFCI
protection. Which device provides the required personnel protection?
A. Standard receptacle
B. GFCI device
C. Circuit breaker without ground-fault protection
D. Transformer
Answer: GFCI device
, Rationale: GFCI protection is intended to reduce the risk of severe electric shock
by interrupting ground-fault current.
9. What is the purpose of an overcurrent protective device?
A. Increase conductor ampacity
B. Protect conductors and equipment from excessive current
C. Stabilize utility frequency
D. Increase power factor
Answer: Protect conductors and equipment from excessive current
Rationale: Fuses and circuit breakers are designed to interrupt excessive current
before conductors or equipment are damaged.
10.Which formula correctly expresses Ohm’s law?
A. P = E × I
B. E = I × R
C. R = P × I
D. I = P × R
Answer: E = I × R
Rationale: Ohm’s law states that voltage equals current multiplied by
resistance.
11.A 120-volt circuit supplies a 1,500-watt resistive load. Approximately how
much current does the load draw?
A. 8.0 A
B. 10.0 A
C. 12.5 A
D. 15.0 A
Answer: 12.5 A
Rationale: I = P ÷ E. Therefore, 1,500 ÷ 120 = 12.5 amperes.
