Journeyman Electrician’s Exam Journeyman Electrician's Special Occupancies 4 — Questions and Answers
Question 1: In a marina, shore power receptacles must be located at least how high above the deck to prevent water immersion?
- 6 inches
- 12 inches (Correct answer)
- 24 inches
- 36 inches
Correct answer: 12 inches
NEC 553.10 and 555.19 require shore power receptacles at marinas to be mounted at least 12 inches above the deck or dock surface.
Question 2: What NEC article governs electrical wiring for manufactured homes?
- Article 545
- Article 550 (Correct answer)
- Article 551
- Article 552
Correct answer: Article 550
NEC Article 550 specifically covers the electrical installation requirements for manufactured homes and manufactured home parks.
Question 3: In a Class I, Zone 0 location, which equipment is required?
- AEx ia category (Correct answer)
- AEx d category
- AEx e category
- AEx n category
Correct answer: AEx ia category
Zone 0 locations require Category 1G equipment (AEx ia intrinsically safe) rated for the most severe hazardous conditions where an ignitable atmosphere is continuously present.
Question 4: In a carnival or fair, all electrical equipment connected to a power source must be inspected by whom before the event opens?
- The equipment manufacturer
- A qualified person (Correct answer)
- The local fire marshal only
- An insurance inspector
Correct answer: A qualified person
NEC 525.10 requires that all electrical equipment at carnivals and fairs be inspected by a qualified person before the event is opened to the public.
Question 5: For a motor fuel dispensing facility, what is the required classification of the underground wiring method for supply conductors?
- Type UF cable
- Type NM cable
- Rigid metal conduit or intermediate metal conduit (Correct answer)
- PVC conduit only
Correct answer: Rigid metal conduit or intermediate metal conduit
NEC 514.8 requires conductors below grade at motor fuel dispensing facilities to be installed in rigid metal conduit or intermediate metal conduit.
Question 6: What minimum ampere rating is required for the shore power supply cord and connector at a marina for a 240V, 30A receptacle?
- 20 amperes
- 25 amperes
- 30 amperes (Correct answer)
- 40 amperes
Correct answer: 30 amperes
Shore power cords and connectors at marinas must have an ampere rating not less than the receptacle they serve; a 30A receptacle requires a 30A rated assembly.
Question 7: In a bulk storage plant for flammable liquids, the area within 5 feet of a vent from an underground tank is classified as:
- Unclassified
- Class I, Division 2
- Class I, Division 1 (Correct answer)
- Class II, Division 1
Correct answer: Class I, Division 1
Per NEC 515.3, the area within 5 feet in all directions from the open end of a tank vent at a bulk storage plant is classified Class I, Division 1.
Journeyman Electrician’s Exam Journeyman Electrician's Special Occupancies 4
In a marina, shore power receptacles must be located at least how high above the deck to prevent water immersion?