Journeyman Electrician Practice Exam
Questions With Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A |
Instant Download Pdf
1. What is the primary purpose of a circuit breaker?
A. Increase voltage
B. Store electricity
C. Protect against overloads and short circuits
D. Convert AC to DC
Answer: C
Circuit breakers automatically interrupt current flow when unsafe
conditions occur.
2. Which law states V = I × R?
A. Ohm’s Law
B. Kirchhoff’s Law
C. Faraday’s Law
D. Watt’s Law
Answer: A
Ohm’s Law defines the relationship between voltage, current, and
resistance.
,3. What unit is electrical resistance measured in?
A. Volts
B. Ohms
C. Amps
D. Watts
Answer: B
Resistance is measured in ohms (Ω).
4. What color is typically used for grounding conductors?
A. White
B. Black
C. Green
D. Red
Answer: C
Green or bare copper is used for grounding.
5. What device measures electrical current?
A. Voltmeter
B. Ohmmeter
C. Ammeter
D. Wattmeter
Answer: C
An ammeter measures current in amperes.
6. What does GFCI stand for?
A. Ground Fault Circuit Interrupter
, B. General Flow Current Indicator
C. Grounded Fuse Circuit Interface
D. Grounded Fault Control Instrument
Answer: A
GFCIs protect against electrical shock.
7. What is the standard frequency of electrical power in the U.S.?
A. 50 Hz
B. 60 Hz
C. 100 Hz
D. 120 Hz
Answer: B
U.S. power systems operate at 60 Hz.
8. What is the function of a transformer?
A. Store electricity
B. Change voltage levels
C. Measure resistance
D. Convert DC to AC
Answer: B
Transformers increase or decrease voltage.
9. What is the formula for electrical power?
A. V/I
B. I/R
C. V × I
, D. R × I
Answer: C
Power equals voltage multiplied by current.
10. What color is a neutral conductor?
A. Black
B. Red
C. White
D. Green
Answer: C
White is standard for neutral conductors.
11. What is the purpose of a fuse?
A. Store energy
B. Prevent overcurrent
C. Increase voltage
D. Reduce resistance
Answer: B
Fuses protect circuits by melting under excess current.
12. What does AC stand for?
A. Applied Current
B. Alternating Current
C. Amplified Current
D. Active Circuit
Questions With Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A |
Instant Download Pdf
1. What is the primary purpose of a circuit breaker?
A. Increase voltage
B. Store electricity
C. Protect against overloads and short circuits
D. Convert AC to DC
Answer: C
Circuit breakers automatically interrupt current flow when unsafe
conditions occur.
2. Which law states V = I × R?
A. Ohm’s Law
B. Kirchhoff’s Law
C. Faraday’s Law
D. Watt’s Law
Answer: A
Ohm’s Law defines the relationship between voltage, current, and
resistance.
,3. What unit is electrical resistance measured in?
A. Volts
B. Ohms
C. Amps
D. Watts
Answer: B
Resistance is measured in ohms (Ω).
4. What color is typically used for grounding conductors?
A. White
B. Black
C. Green
D. Red
Answer: C
Green or bare copper is used for grounding.
5. What device measures electrical current?
A. Voltmeter
B. Ohmmeter
C. Ammeter
D. Wattmeter
Answer: C
An ammeter measures current in amperes.
6. What does GFCI stand for?
A. Ground Fault Circuit Interrupter
, B. General Flow Current Indicator
C. Grounded Fuse Circuit Interface
D. Grounded Fault Control Instrument
Answer: A
GFCIs protect against electrical shock.
7. What is the standard frequency of electrical power in the U.S.?
A. 50 Hz
B. 60 Hz
C. 100 Hz
D. 120 Hz
Answer: B
U.S. power systems operate at 60 Hz.
8. What is the function of a transformer?
A. Store electricity
B. Change voltage levels
C. Measure resistance
D. Convert DC to AC
Answer: B
Transformers increase or decrease voltage.
9. What is the formula for electrical power?
A. V/I
B. I/R
C. V × I
, D. R × I
Answer: C
Power equals voltage multiplied by current.
10. What color is a neutral conductor?
A. Black
B. Red
C. White
D. Green
Answer: C
White is standard for neutral conductors.
11. What is the purpose of a fuse?
A. Store energy
B. Prevent overcurrent
C. Increase voltage
D. Reduce resistance
Answer: B
Fuses protect circuits by melting under excess current.
12. What does AC stand for?
A. Applied Current
B. Alternating Current
C. Amplified Current
D. Active Circuit
