Journeyman Open Book Practice Exam #21

Journeyman Open Book Practice Exam #21 where extensive metal in or on buildings or structures may become energized and is subject to personal contact _______ will provide additional safety. a) adequate bonding and grounding b) bonding c) suitable ground detectors d) none of these - a) adequate bonding and grounding single conductor cables shall be ______ or larger and shall be of a type listed for use in cable trays. (a) #1 (b) #1/0 (c)#4/0 (d)#250 kcmil - (b) #1/0 392.10 (B1) The grounded conductor, when insulated, shall have insulation _____ I. rated not less than 300 volts for solidly grounded neutral systems of 2 kv and over as described in section 250.184 II. which is suitable, other than color, for any ungrounded conductor of the same circuit on circuits of less than 1000 volts. a) I only b) II only c) either I or II d) neither I or II - B) II only 200.2 (A) which of the following is not true regarding rigid nonmetallic conduit? a)extreme cold may cause some nonmetallic conduits to become brittle and therefor more susceptible to damage from physical contact 352.10 b) can be used to support luminaires c) all cut ends shall be trimmed inside and outside to remove rough edges 352.28 d) expansions joints shall be provided to compensate for thermal expansion and contraction. 352.44 - b) can be used to support luminaires lighting track conductors shall be a minimum _____ AWG or equal, and shall be coper. a) #16 b)#14 c)#12 d)#10 - c)#12 RTRC conduit 2" in size shall be securely fastened within 3' of each box and horizontally a maximum of _____ between supports. a) 5' b) 6' c) 7' d) 10' - a) 5' 355.30 Cablebus shall be installed only for _____ work. a) exposed b)commercial c) =concealed d)hazardous - a) exposed 370.10 (1) knife switches rated for more than 1,200 amperes at 250 volts ____. a) are used only as isolating switches b) should be placed so that gravity tends to close them c)should be opened slowly under load d)should be connected so blades are not dead in open position - a) are used only as isolating switches 404.13 (A) a transerve metal raceway for electrical conductors, furnishing access tp predetermined cells of a precast cellular concrete floor, which permits installation of conductors from a distribution center to the floor cells is called____. a) an underfloor raceway b) a header c) a cellular raceway d) a mandrel - b) a header 372. Because aluminum is not a magnetic metal, there will be no heating due to _______. a) electrolysis b) hysteresis c) hermetic d) galvanic action - b) hysteresis 300.20 info note Luminaires shall be constructed, or installed, or equipped with shades or guards that combustible material will not be subjected to temperatures in excess of _______. a) 90 F b) 86 F c) 30 C d) 90 C - d) 90 C 410.11 overhead track and hoist system for moving material around the boatyard or moving or launching boats is the definition of a _______. a) monorail b) boat lift c) track hoist d) boat jack - a) monorail 555.2 all cut ends of rigid conduit shall be ______. a) threaded b) electrically continuous c) reamed d) cut square - c) reamed 344.28 what size conductor shall be connected between the ground grid and all metal parts of swimming pools? a) #8 b) #10 c) #6 d) #4 - a) #8 680.26 (B) unsupported runs of armored cable shall be permitted to be unsupported where the cable is not more than _____ inches at terminals where flexibility is necessary. a) 24 b) 3 c) 36 d)48 - a) 24 320.30 (D)