122

21. A permanently connected electric water heater ___ permitted to be supplied by a flexible cord connection. Select one: a. is b. is not

b

16. Complete the following verbatim Code statements or provide the NEC reference. Frames of electric ranges, wall-mounted ovens, counter-mounted cooking units, clothes dryers, and outlet or junction boxes that are part of the circuit for these appliances shall be connected to the equipment grounding conductor in the manner specified by ___. Select one: a. 250.134 or 250.138 b. 250.132 or 250.136 c. 250.130 or 250.138 d. 250.124 or 250.126

a

18. Does the NEC permit a 2-pole circuit breaker to be used as the disconnecting means for a 3.3 KVA, 240-volt, 1Ø air compressor? The equipment is installed in the electrical room with and is within sight of the circuit breaker panelboard. Select one: a. Yes b. No

a

20. A water heater has a nameplate rating of 5 KW @ 230 volts. This water heater will draw ___ amperes when operated at the rated voltage. Select one: a. 21.74 b. 20.83 c. 46.0 d. 19.69 e. 22.68

a

23. A circuit is energized. When you touch the probes (leads) of a voltmeter across the terminals of a single-pole switch that is in the OFF position, you are completing the circuit and current flows through the meter's resistance. Select one: a. True b. False

a

3. A circuit is energized. When you touch the probes (leads) of a voltmeter across the terminals of a single-pole switch that is in the OFF position, you are completing the circuit. Select one: a. True b. False

a

31. For the EWR residence, what voltage does the food-waste disposal show on the special purpose outlet schedule? Select one: a. 120 volts b. 120/240 volts c. 240 volts d. 208 volts

a

1. Operating a 240-volt water heater (or other resistive load) at 208 volts will result in ____ heat output (in watts) and a ____ life. Select one: a. higher, shorter b. lower, longer c. lower, shorter d. higher, longer

b

15. Complete the following verbatim Code statements or provide the NEC reference. The rating of an individual branch circuit conductors shall not be less than ___ or the marked rating of an appliance having combined loads as provided in 422.62. Select one: a. the maximum current rating b. the marked rating of the appliance c. the overcurrent size d. the minimum voltage rating

b

17. Complete the following verbatim Code statements or provide the NEC reference. The NEC requirement that "each electric appliance shall be provided with a nameplate giving the identifying name and the rating in volts and amperes, or in volts and watts" is located in Article ___. Select one: a. 680 b. 422 c. 410 d. 230

b

2. All fixed storage water heaters of 120 gallons or less are required to have a branch circuit over current device and conductor rating of not less than ___ percent of the nameplate rating of the water heater. Select one: a. 100 b. 125 c. 140 d. 170

b

30. A ___ branch circuit is connected to the electric furnace in the EWR residence. Select one: a. 120-volt, 20-amp b. 240-volt, 70-amp c. 240-volt, 50-amp d. 208-volt, 70-amp

b

36. Re: EWR plans & specs. The water pump is located in the ___ corner of the house. Select one: a. northeast b. southeast c. northwest d. southwest

b

37. For the EWR residence, the disconnecting means for the submersible water pump is within sight of the ___. Select one: a. motor b. controller c. both a & b

b

19. The NEC permits a ___ to be used as the disconnecting means for a 2.9 KVA, 240-volt, 1Ø air compressor. I. 2-pole circuit breaker II. 2-pole switch (DPST) Select one: a. I only b. II only c. either I or II d. neither I nor II

c

32. On the EWR plans, the water pump is located in the ___. Select one: a. kitchen b. living room c. workshop d. garage

c

14. Complete the following verbatim Code statements or provide the NEC reference. According to Article 422, an accessible separable connector or an accessible ___ shall be permitted to serve as the disconnecting means for cord-and-plug-connected appliances. Select one: a. panel b. method c. device d. plug and receptacle

d

22. Before applying power to an electric water heater, ___. Select one: a. combustible materials within 50 feet should be removed b. all heating elements should be jumpered together on both ends c. superheated water should be released through the relief valve d. the tank must be full of water

d

33. For the EWR project, the breaker for the water heater circuit has a rating of ___ amps. Select one: a. 40 b. 15 c. 20 d. 30

d

34. Re: EWR plans & specs. The dual-element fuses that are recommended for back-up (supplemental overcurrent) protection on the water pump are rated at ___ amps. Select one: a. 5 b. 15 c. 3 d. 10

d

35. Re: EWR plans & specs. What is the horsepower rating of the water pump? Select one: a. 1/2 b. 1/6 c. 2 d. 1

d