MAINTENANCE ELECTRICIAN PRACTICE EXAM #2 Que & Ans

Electrical equipment rooms or enclosures housing electrical apparatus of not over 1000 volts that are controlled by a lock (s) shall be considered accessible to _____. A. qualified persons only B. electricians only C. the building management D. the authority having jurisdiction - ANS A. qualified persons only 110.26 (F) pg. 49 Where the premises wiring systems has branch-circuits supplied from more than one nominal voltage system, each ungrounded conductor of a branch-circuit shall be identified by ____ at the panelboard. A. floor B. voltage C. phase and system D. room - ANS C. phase and system 210.5(C)(1) pg. 57 Compliance with the provisions of the NEC will result in an electrical installation that is essentially ______. A. free from hazard B. a good electrical system C. an efficient system D. all of these - ANS A. free from hazard 90.1(B) pg. 30 Under normal conditions, an equipment grounding conductor will ______. A. improve current flow B. not carry current C. carry current D. reduce circuit resistance - ANS B. Article 100 Trade knowledge pg. 37 How much clear working space is required to be maintained between a 3-phase 480Y/277V main switchboard and a concrete block wall? A. 3 feet B. 3 feet, 6 inches C. 4 feet D. 4 feet, 6 inches - ANS B. 3 feet, 6 inches Table 110.26(A)(1), Condition 1 pg. 47 A motor with nine leads coming out of it is a ______ motor. A. two phase B. two speed C. dual voltage D. multi-speed - ANS C. dual voltage Trade Knowledge On a four-wire, delta-connected system, the conductor having the higher voltage to ground (high-leg) shall be identified as ___ in color, if the grounded conductor is also present to supply lighting or similar loads. A. white B. red C. green D. orange - ANS D. orange 110.15 pg. 45 When an electrical trade size 3/4 inch electrical metallic tubing (EMT) is in excess of 24 inches of length, the conduit is permitted to contain NO more than ____ size 10 AWG conductors with THWN insulation. A. 6 B. 10 C. 8 D. 14 - ANS B. 10 Annex C, Table C.1 pg. 714 Given: An electrical metallic tubing (EMT) 50 feet in length to be installed will contain a total of nine (9) conductors. Six (6) of these wires are considered to be current-carrying. What is the adjustment factor, in percent, that must be applied to the ampacity of the current-carrying conductors? A. 80 % B. 70% C. 60% D. 50% - ANS A. 80% Table 310.15(B)(3)(a) pg. 148 The reason the NEC requires all grounded and ungrounded conductors of a common circuit to be installed together in the same ferrous metal raceway is to reduce ______. A. expense B. inductive heat C. voltage drop D. resistance - ANS B. inductive heat 300.20(A) pg. 141 When exemptions are not a consideration, electrical metallic tubing (EMT) shall be securely fastened within ____ of each junction box, panel board, or other conduit termination. A. 3 feet B. 6 feet C. 8 feet D. 10 feet - ANS A. 3 feet 358.30(A) pg. 210