Journeyman Electrician Practice Exam #7 Questions With Verified Answers

Where the outer sheath of Type MI cable is made of steel _____________. A. it shall provide an adequate path to serve as an equipment grounding conductor B. a separate equipment grounding conductor shall be provided C. the grounding and grounded conductors shall be connected together D. it shall not be longer than 6 feet - Answer B. a separate equipment grounding conductor shall be provided The interior of enclosures or raceways installed underground shall be considered to be a _________ location. A. wet B. damp C. moist D. dry - Answer A. wet The continuity of the equipment grounding conductor system used to reduce electrical shock hazards for portable electrical carnival equipment shall be verified ______________. A. and recorded on an annual basis B. and recorded on a quarterly basis C. and recorded on a monthly basis D. each time the equipment is connected - Answer D. each time the equipment is connected A plate-type grounding electrode shall be installed below the surface of the earth NOT less than ________. A. 24 inches B. 30 inches C. 36 inches D. 48 inches - Answer B. 30 inches Determines the MAXIMUM allowable ampacity of a size 1/0 AWG THW copper current-carrying conductors of the same size. Ambient temperature is 86*F. A. 150 amperes B. 105 amperes C. 112 amperes D. 120 amperes - Answer D. 120 amperes In class II, Division 1, hazardous locations, where pendant mounted luminaries are suspended by rigid metal conduit (RMC) and a means for flexibility is not provided, the RMC term shall have a length of NOT more than __________. A. 12 inches B. 18 inches C. 24 inches D. 30 inches - Answer A. 12 inches Determine the MINIMUM size THW copper branch-circuit conductors required by the NEC* to supply a 3-phase, continuous-duty, AC motor that has a full-load current of 70 amperes. Assume all terminations to be rated for 75*C. A. 1 AWG B. 2 AWG C. 3 AWG D. 4 AWG - Answer C. 3 AWG Given: You have determined a conductor has a computed allowable ampacity of 75 amperes. What is the MAXIMUM standard ampere rating of the overcorrect protection device the NEC* permits to protect this circuit? Assume this is not a motor circuit or part of a branch-circuit supplying more than one receptacle. A. 70 amperes B. 75 amperes C. 80 amperes D. 85 amperes - Answer C. 80 amperes A 208-volt, 3-phase, 50 hp, squirrel-cage, continuous-duty, Design C, AC motor has a full-load running current of _________. A. 130 amperes B. 143 amperes C. 162 amperes D. 195 amperes - Answer B. 143 amperes Luminaires installed under metal-corrugated sheet roofing decking shall be installed and supported so there is NOT less than ________ clearance from the roof decking to the top of the luminaires. A. 1 in. B. 1 1/4 in. C. 1 1/2 in. D. 1 3/4 in. - Answer C. 1 1/2 in. Determine the MINIMUM trade size electrical metallic tubing (EMT) required to enclose eight (8) size 6 AWG copper conductors with THHW insulation, where installed in a 60-foot conduit run. A. 1 inch B. 1 1/4 inches C. 1 1/2 inches D. 2 inches - Answer B. 1 1/4 inches In general, when feeder conductors of not over 600 volts supply a continuous- load of 240 amperes, the overcorrect protection device protecting this circuit shall have a MINIMUM rating of ____________. A. 240 amperes B. 300 amperes C. 250 amperes D. 275 amperes - Answer B. 300 amperes