Journeyman Electrician Exam 3

Journeyman Electrician Exam 3 Where a water pipe passes over an indoor motor control center, leak protection apparatus shall have a MINIMUM clearance of _____. a) 6 feet to the protection apparatus b) 6 feet to the water pipe c) 6 1⁄2 feet to the protection apparatus d) 6 1⁄2 feet to the water pipe - A: 6 feet to the protection apparatus Ref: 110.26(F)(1)(a) Branch circuit grounded conductors that are not connected to an overcurrent device shall be permitted to be sized at LEAST _____ of the continuous and noncontinuous load to be served. a) 100 percent b) 80 percent c) 75 percent d) 125 percent - A: 100 percent Ref: 210.19(A)(1), Ex. 2 The MAXIMUM standard rating of the initial non-time-delay fuse for the branch-circuit, short-circuit, and ground-fault protection of a 1 HP, three-phase, 208-volt, squirrel-cage AC motor shall be _____. a) 6 amperes b) 10 amperes c) 15 amperes d) 20 amperes - C: 15 amperes Ref: 430.250; Tbl. 430.52; 430.52(C)(1), Ex.1 Sol: FLC of motor - 4.6 amperes x 300% = 13.8 amperes For Class III equipment that is not subject to overloading the MAXIMUM surface temperature under operating conditions shall NOT exceed _____. a) 120°C b) 165°C c) 248°F d) 210°C - B: 165°C Ref: 503.5 When a metal wireway contains splices and taps, the conductors, splices and taps shall not fill the wireway to more than _____ of its area at that point. a) 20 percent b) 30 percent c) 40 percent d) 75 percent - D: 75 percent Ref: 376.56(A) In an underground installed Schedule 40 PVC conduit system that consists of 50 feet in length between pulling points, what is the MAXIMUM number of bends this conduit run may have? a) four 90° bends b) six 90° bends c) four 120° bends d) two 90° bends - A: four 90° bends Ref: 352.26 Grounding electrodes made of pipe or conduit shall not be smaller than _____ electrical trade size. a) 1⁄2 inch b) 3⁄4 inch c) 1 inch d) 11⁄2 inch - B: 3/4 inch Ref: 250.52(A)(5)(a) Liquid-tight flexible metallic conduit (LFMC) shall NOT be used _____. a) in lengths in excess of 6 feet b) in concealed work c) in hazardous locations d) where subject to physical damage - D: where subject to physical damage Ref: 350.12(1)