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Missouri Journeyman Electrician Exam
Practice Test Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A Instant Download
Pdf
___________________________________________________________________
1. What is the primary purpose of the National Electrical Code (NEC)?
A. To reduce construction costs
B. To establish architectural standards
C. To provide minimum safety standards for electrical installations
D. To regulate utility companies
Rationale: The NEC is designed to protect persons and property from electrical
hazards by establishing minimum safety requirements.
2. According to the NEC, what is the minimum working space depth for
equipment operating at 150 volts to ground?
A. 24 inches
B. 36 inches
C. 42 inches
D. 48 inches
Rationale: NEC 110.26 requires a minimum depth of 3 feet (36 inches) for many
installations operating at 150 volts to ground.
, 3. Which conductor is intentionally grounded?
A. Equipment grounding conductor
B. Bonding jumper
C. Grounded conductor
D. Ungrounded conductor
Rationale: The grounded conductor, commonly called the neutral, is
intentionally connected to ground.
4. What device protects against overload and short-circuit conditions?
A. Relay
B. Switch
C. Circuit breaker
D. Receptacle
Rationale: Circuit breakers are overcurrent protective devices designed to
interrupt overloads and short circuits.
5. What color insulation is typically used for grounded conductors smaller
than 6 AWG?
A. Green
B. Red
C. Blue
D. White or gray
Rationale: NEC requires grounded conductors to be identified by white or gray
insulation.
6. What is the minimum cover depth for direct burial UF cable under a
residential driveway?
A. 12 inches
B. 18 inches
C. 24 inches
D. 36 inches
, Rationale: NEC Table 300.5 requires 24 inches of cover for direct burial cable
beneath driveways.
7. What does GFCI stand for?
A. Ground Fault Circuit Interrupter
B. Ground Feed Circuit Indicator
C. Ground Fault Current Integrator
D. Ground-Fault Circuit Interrupter
Rationale: A GFCI protects against electric shock by opening the circuit when a
ground fault occurs.
8. Which NEC article covers motors?
A. Article 210
B. Article 250
C. Article 430
D. Article 680
Rationale: NEC Article 430 contains requirements for motors, motor circuits, and
controllers.
9. What is the maximum number of current-carrying conductors allowed in a
conduit before ampacity adjustment is required?
A. 2
B. 3
C. 4
D. 6
Rationale: Ampacity adjustment begins when more than three current-carrying
conductors are installed together.
10.Which tool is commonly used to verify the absence of voltage?
A. Pipe wrench
B. Torque screwdriver
Missouri Journeyman Electrician Exam
Practice Test Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A Instant Download
___________________________________________________________________
1. What is the primary purpose of the National Electrical Code (NEC)?
A. To reduce construction costs
B. To establish architectural standards
C. To provide minimum safety standards for electrical installations
D. To regulate utility companies
Rationale: The NEC is designed to protect persons and property from electrical
hazards by establishing minimum safety requirements.
2. According to the NEC, what is the minimum working space depth for
equipment operating at 150 volts to ground?
A. 24 inches
B. 36 inches
C. 42 inches
D. 48 inches
Rationale: NEC 110.26 requires a minimum depth of 3 feet (36 inches) for many
installations operating at 150 volts to ground.
, 3. Which conductor is intentionally grounded?
A. Equipment grounding conductor
B. Bonding jumper
C. Grounded conductor
D. Ungrounded conductor
Rationale: The grounded conductor, commonly called the neutral, is
intentionally connected to ground.
4. What device protects against overload and short-circuit conditions?
A. Relay
B. Switch
C. Circuit breaker
D. Receptacle
Rationale: Circuit breakers are overcurrent protective devices designed to
interrupt overloads and short circuits.
5. What color insulation is typically used for grounded conductors smaller
than 6 AWG?
A. Green
B. Red
C. Blue
D. White or gray
Rationale: NEC requires grounded conductors to be identified by white or gray
insulation.
6. What is the minimum cover depth for direct burial UF cable under a
residential driveway?
A. 12 inches
B. 18 inches
C. 24 inches
D. 36 inches
, Rationale: NEC Table 300.5 requires 24 inches of cover for direct burial cable
beneath driveways.
7. What does GFCI stand for?
A. Ground Fault Circuit Interrupter
B. Ground Feed Circuit Indicator
C. Ground Fault Current Integrator
D. Ground-Fault Circuit Interrupter
Rationale: A GFCI protects against electric shock by opening the circuit when a
ground fault occurs.
8. Which NEC article covers motors?
A. Article 210
B. Article 250
C. Article 430
D. Article 680
Rationale: NEC Article 430 contains requirements for motors, motor circuits, and
controllers.
9. What is the maximum number of current-carrying conductors allowed in a
conduit before ampacity adjustment is required?
A. 2
B. 3
C. 4
D. 6
Rationale: Ampacity adjustment begins when more than three current-carrying
conductors are installed together.
10.Which tool is commonly used to verify the absence of voltage?
A. Pipe wrench
B. Torque screwdriver
