Maintenance Electrician Exam #2 correctly answered rated A+ 2023

Maintenance Electrician Exam #2In computing the load of luminaires that employ ballast, transformers, or autotransformers, such as fluorescent lighting units, the load must be based on the _____. a) total wattage of the lamps b) VA of the lamps c) length of the lighting fixture d) ampere ratings of the complete units D: ampere ratings of the complete units Ref: 220.18(B) A branch-circuit inverse-time circuit breaker rated in amperes shall be permitted as a controller for _____. a) continuous-duty motors b) intermittent-duty motors c) torque motors d) all motors D: all motors Ref: 430.83(A)(2) 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 A: free from hazard Ref: 90.1(B) Under normal conditions, an equipment grounding conductor will _____. a) improve current flow b) not carry current c) carry current d) reduce circuit resistance B: not carry current Ref: Art. 100; Trade Knowledge Cord-and-plug-connected vending machines located in break rooms of commercial establishments are required to be provided with _____. I) a power supply cord not smaller than size 12 AWG with a length not exceeding 4 feet. II) GFCI protection a) I only b) II only c) both I and II d) neither I nor II B: II only Ref: 422.51 A motor with nine leads coming out of it is a _____. a) two-phase motor b) two-speed motor c) dual-voltage motor d) multi-speed motor C: dual-voltage motor Ref: 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 D: orange Ref: 110.15 When an electrical trade size 3⁄4 inch electrical metallic tubing (EMT) is in excess of 24 inches in length, the conduit is permitted to contain no more than _____ size 10 AWG conductors with THWN insulation. a) six b) ten c) eight d) fourteen B: ten Ref: Annex C, Tbl. C.1 Given: an electrical metallic tubing (EMT) 50 feet in length to be installed will contain a total of nine conductors. Six of these wires are considered to be current-carrying. What is the derating factor, in percent, that must be applied to the ampacity of the current-carrying conductors? a) 80 percent b) 70 percent c) 60 percent d) 50 percent A: 80 percent Ref: Tbl. 310.15(B)(2)(a) 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 B: inductive heat Ref: 300.20(A) In general, electrical metallic tubing (EMT) shall be securely fastened within ____ of each junction box, panelboard, or other conduit termination. a) 3 feet b) 6 feet c) 8 feet d) 10 feet A: 3 feet Ref: 358.30(A) One horsepower is equal to _____ watts. a) 746 b) 1,000 c) 1,250 d) 1,500 A: 746 Ref: General Knowledge For continuous-duty motors, the motor nameplate current rating is used to determine the size of the _____ required for the motor. a) disconnecting means b) branch-circuit conductors c) motor overload protection d) short-circuit protection C: motor overload protection Ref: 430.6(A)(2)