Journeyman Electrician’s Exam Journeyman Electrician's 5 — Questions and Answers
Question 1: According to the NEC, what is the maximum distance between supports for rigid nonmetallic conduit (PVC) with a trade size of 1 inch?
- 3 feet
- 4 feet (Correct answer)
- 5 feet
- 6 feet
Correct answer: 4 feet
NEC Table 352.30(B) requires PVC conduit of 1-inch trade size to be supported at maximum intervals of 4 feet.
Question 2: What is the maximum number of 90-degree bends permitted in a single conduit run between pull points?
- 2
- 3
- 4 (Correct answer)
- 360 degrees total
Correct answer: 4
NEC 358.26 (and similar articles) limit the total bends between pull points to 360 degrees, which equals four 90-degree bends.
Question 3: Which of the following loads is considered a continuous load for circuit sizing purposes?
- A refrigerator cycling on and off
- A lighting circuit energized for 8 hours per day (Correct answer)
- A motor running for 2.5 hours
- A toaster oven used for 30 minutes
Correct answer: A lighting circuit energized for 8 hours per day
NEC 100 defines a continuous load as one where the maximum current is expected to continue for 3 hours or more; 8 hours of lighting qualifies.
Question 4: What is the required working clearance in front of a 120/240V panelboard mounted in a residential garage?
- 18 inches
- 24 inches
- 30 inches (Correct answer)
- 36 inches
Correct answer: 30 inches
NEC 110.26(A)(1) requires a minimum working clearance of 3 feet (36 inches) in front of electrical equipment rated 120V to 250V, Condition 1.
Question 5: When calculating service load for a residential dwelling, what demand factor applies to the first 3,000 VA of general lighting load?
- 25%
- 50%
- 75%
- 100% (Correct answer)
Correct answer: 100%
NEC Table 220.42 requires the first 3,000 VA of general lighting load in a dwelling unit to be calculated at 100% demand factor.
Question 6: In a commercial location, GFCI protection for 125-volt, 15- and 20-ampere receptacles is required in which area?
- Storage rooms only
- All areas accessible to the public
- Kitchens, bathrooms, rooftops, and other specified locations (Correct answer)
- Only outdoors
Correct answer: Kitchens, bathrooms, rooftops, and other specified locations
NEC 210.8(B) requires GFCI protection for commercial receptacles in kitchens, bathrooms, rooftops, outdoors, sinks, and other specific locations.
Question 7: What is the power factor of a purely resistive circuit?
- 0
- 0.5
- 0.8
- 1.0 (Correct answer)
Correct answer: 1.0
A purely resistive circuit has voltage and current in phase, so the power factor equals 1.0 (unity), meaning all power is real (active) power.
Journeyman Electrician’s Exam Journeyman Electrician's 5
According to the NEC, what is the maximum distance between supports for rigid nonmetallic conduit (PVC) with a trade size of 1 inch?