GET WIRED! 202 Lesson 10 Quiz
3. At least ___ inches of free conductor shall be left at each outlet, junction, or switch point. A. 6 B. 12 C. 18 D. 24
A. 6
13. Suitable _______ shall be installed on all boxes, fittings, and similar enclosures to prevent accidental contact with energized parts or physical damage to parts or insulation. A. covers B. tape C. bushings D. both A & B
A. covers
2. The inductive heating effect of metal is minimized by cutting ___ between the holes for conductors. A. slots B. conductors C. the size D. none of the above
A. slots
5. There shall be no splice or tap within a raceway. A. true B. false
A. true
6. Conductors of opposite polarities which are run in close proximity to one another produce a heating effect on ferrous metal. A. true B. false
B. false
7. AC conductors installed in metal raceways or enclosures shall be arranged to provide induction heating of the metal raceways or enclosures. A. true B. false
B. false
11. The number and size of conductors in any raceway shall not be more than will permit dissipation of the _______. A. electromotive force B. heat C. ampacity D. electrons
B. heat
1. When a conduit contains three or more conductors, the cross-sectional area of the conductors shall not exceed ___% of the cross-sectional area of the conduit. A. 10 B. 31 C. 40 D. 53
C. 40
15. Where installed in raceways, conductors of size ___ AWG and larger shall be stranded. A. 4 B. 6 C. 8 D. 10
C. 8
10. A ________ shall be permitted in lieu of a box or terminal where the conductors emerge from a raceway and enter or terminate at equipment. A. hub B. conduit body C. bushing D. gutter
C. bushing
4. The space over a hung, suspended ceiling used for environmental air is designated ______ space by the NEC. A. roof B. duct C. other D. neither A, B, nor C
C. other
14. The conductor shall not be bent to a radius less than __ _times the overall diameter for nonshielded conductors or ___ times the overall diameter for shielded or lead-covered conductors during or after installation. A. 15,20 B. 5,10 C. 12,12 D. 8,12
D. 8,12
9. Boxes or cabinets marked "_____" can be installed outdoors. A. Raintight B. Rainproof C. Outdoor Type D. A, B, and C
D. A, B, and C
8. Cables and conductors rated over 1000 volts, installed on the side of a pole or building shall be protected up to ___ft. above finished grade. A. 5 B. 7 1/2 C. 10 D. None of the above
D. None of the above
12. No wiring systems of any type shall be installed in ducts used to transport ______, loose stock, or flammable vapors. A. air B. water C. ice D. dust
D. dust