Journeyman Electrician Practice Test
Journeyman Electrician Special Occupancies, Equipment & Systems Practice Questions
Special Occupancies, Equipment & Systems makes up 5 of every 50 questions on a Tigertest Journeyman Electrician practice test. Here are 10 of the 20 questions on it, each with the answer and the reason.
Updated by the Tigertest team. Based on the 2023 National Electrical Code (NFPA 70) and standard electrical theory. Original questions; 50 per test, 70% to pass. State licensing law not included.
1. A Class I hazardous location is one where the hazard is:
- A.Corrosive liquids
- B.Flammable gases or vapors
- C.Combustible dust
- D.Ignitible fibers
Answer: B. Class I locations have flammable gases, flammable liquid-produced vapors or combustible liquid-produced vapors. Class II is combustible dust and Class III is ignitible fibers and flyings.
2. At a permanently installed dwelling pool, general-purpose receptacles must be at least how far from the inside wall of the pool?
- A.10 ft
- B.20 ft
- C.5 ft
- D.6 ft
Answer: D. Receptacles must be at least 6 ft from the inside walls of a pool. At least one 125 V receptacle is required between 6 ft and 20 ft from the pool at a dwelling.
3. In a Division 2 location, the hazardous material is normally present:
- A.Only under abnormal conditions
- B.During normal maintenance
- C.Continuously during operation
- D.Intermittently during operation
Answer: A. Division 2 is where ignitible concentrations are not normally present and occur only through accident or abnormal operation. Normal operation or maintenance concentrations make it Division 1.
4. Branch circuits serving patient care spaces in a health care facility must provide:
- A.Isolated neutral conductors
- B.Nonmetallic cable wiring
- C.Two grounding paths
- D.Aluminum grounding conductors
Answer: C. Patient care space branch circuits need redundant grounding: a metal raceway or cable armor that qualifies as an equipment grounding path plus an insulated copper equipment grounding conductor.
5. Threaded joints in conduit for a Class I explosionproof system must have at least how many threads fully engaged?
- A.Four
- B.Seven
- C.Five
- D.Three
Answer: C. Threaded conduit and fittings in explosionproof installations must be made up wrench-tight with at least five full threads engaged, so a flame path is cooled before escaping.
6. In a major repair garage without the ventilation that allows declassification, the floor area is Class I, Division 2 up to:
- A.18 in. above the floor
- B.24 in. above the floor
- C.36 in. above the floor
- D.12 in. above the floor
Answer: A. Where fuel vapors may collect at floor level, the space up to 18 in. above the floor is Class I, Division 2 unless mechanical ventilation as described in the Code is provided.
7. A grain elevator area with combustible dust in the air is classified as:
- A.Zone 0
- B.Class I
- C.Class III
- D.Class II
Answer: D. Combustible dust makes a location Class II. Zone 0 belongs to the zone system for gases and vapors.
8. An emergency system must make power available to its loads within:
- A.5 seconds
- B.10 seconds
- C.30 seconds
- D.60 seconds
Answer: B. Emergency systems must be able to supply power within 10 seconds of loss of normal power. Legally required standby systems have 60 seconds.
9. On a construction site, 125 V, single-phase 15 A receptacles for temporary power must have:
- A.Isolated grounding contacts
- B.GFCI protection for personnel
- C.AFCI protection
- D.Tamper-resistant contacts
Answer: B. All 125 V, single-phase 15, 20 and 30 A receptacle outlets used for temporary power on construction sites need GFCI protection for personnel.
10. The equipotential bonding grid around a pool must use copper conductors no smaller than:
- A.10 AWG solid copper
- B.8 AWG stranded aluminum
- C.6 AWG stranded copper
- D.8 AWG solid copper
Answer: D. Equipotential bonding conductors are solid copper, insulated, covered or bare, not smaller than 8 AWG. The purpose is to keep all metal and water at the same potential, not to clear faults.
Practice all 20 special occupancies, equipment & systems questions, and the rest of the 200-question bank, in the free Journeyman Electrician training sets. Questions you miss come back until you have mastered them.
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