Test Questions And Correct Answers (Verified
Answers) Plus Rationales 2025/2026 Q&A |
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1. What is the minimum size copper grounding electrode conductor for a 100-
amp service?
A. 6 AWG
B. 4 AWG
C. 8 AWG
D. 2 AWG
B. 4 AWG
Rationale: According to the National Electrical Code (NEC) Table 250.66, a 100-
amp service requires a minimum 4 AWG copper grounding electrode conductor.
2. Which type of conduit is best suited for outdoor, wet locations?
A. EMT
B. PVC
C. FMC
D. NM-B
,B. PVC
Rationale: PVC conduit is nonmetallic, corrosion-resistant, and suitable for wet
locations.
3. What is the maximum overcurrent protection for a 14 AWG copper
conductor in a general-purpose branch circuit?
A. 10 A
B. 15 A
C. 20 A
D. 25 A
B. 15 A
Rationale: NEC Table 310.15(B)(16) allows 14 AWG copper conductors to be
protected at 15 amps maximum.
4. How often should an electrical contractor maintain records of continuing
education?
A. 1 year
B. 2 years
C. 3 years
D. 4 years
C. 3 years
Rationale: Florida Statutes require licensed electrical contractors to maintain CE
records for three years for verification purposes.
5. Which NEC article covers grounding and bonding?
A. 210
B. 250
, C. 310
D. 400
B. 250
Rationale: NEC Article 250 provides rules for grounding and bonding of electrical
systems.
6. What is the minimum height for service entrance conductors over a
driveway?
A. 10 ft
B. 12 ft
C. 14 ft
D. 16 ft
C. 14 ft
Rationale: NEC 230.24(A) requires service entrance conductors to be at least 14
feet above driveways to prevent contact with vehicles.
7. Which type of overcurrent protection device is fastest for protecting
against short circuits?
A. Fuse
B. Circuit breaker
C. GFCI
D. AFCI
A. Fuse
Rationale: Fuses respond faster than most circuit breakers to overcurrent
conditions, providing rapid protection against short circuits.
, 8. What is the maximum spacing of receptacles in a dwelling per NEC?
A. 6 ft
B. 8 ft
C. 10 ft
D. 12 ft
B. 12 ft
Rationale: NEC 210.52(A) requires wall receptacles to be installed so that no
point along the floor line is more than 6 ft from a receptacle, effectively spacing
them 12 ft apart.
9. Which insulation type is commonly used for high-temperature residential
wiring?
A. THHN
B. NM-B
C. UF
D. MC
A. THHN
Rationale: THHN insulation is rated for 90°C in dry locations, making it suitable
for high-temperature environments.
10.What is the minimum clear working space in front of an electrical panel
rated 400A or less?
A. 3 ft
B. 3.5 ft
C. 4 ft
D. 5 ft