Conversions- "Ohm" My
1. Current is represented by the letter or symbol_____.
a. I b. V c. C d. Ω
What is "a"- I
13. 12 7/16 + 9 31/64 = ______
a. 22 19/32 b. 20 42/64 c. 21 59/64 d. 22 7/16
What is "c"- 21 59/64
8. What word makes a code requirement mandatory?
a. May b. Always c. Shall D. Can
What is "c"- Shall
32. Type AC cable shall be permitted to be unsupported where the cable is not more than ____ feet in length at terminals where flexibility is necessary.
a. 5 b. 3 c. 4.5 d. 6 e. 2
What is "e"- 2 feet
(NEC 320.30(D)(2))
41. A receptacle with a 15-20 NEMA configuration should be used on ____-volt circuits.
a. 125 b. 1ø250 c. 125/250 d. 277 e. 3ø250
What is "e"- 3ø250
17. 10 A = ______ kA
a. .1 b. 1 c. 100 d. .001 e. .01
What is "e"- .01
12. 175 is ____ % of 150
a. 116.7 b. 857.14 c. 85.7 d. 11.67
What is "a"- 116.7%
175 / 150 = 116.7%
46. Guest suites of hotels with permanent cooking provisions shall be required to have AFCI protection for the bedrooms according to ____ in the NEC.
a. 240.2(B) b. 210.12(C) c. 230.42 d. 725.25
What is "b"- 210.12(C)
33. What is the maximum distance permitted between a box and the first strap (support) for a 12-2 Type MC cable installation? ______ feet
a. 3 b. 6 c. 4 1/2 d. none of these
What is "d"- none of these
(Correct answer is 12 inches= 1 foot)
34. When connections to motorized appliances such as food waste disposers, washers, dryers, air-conditioners, and heat pumps that may be subject to vibration are made, ________ is an acceptable choice for the wiring method.
a. electrical metallic tubing
b. rigid nonmetallic conduit
c. liquidtight flexible nonmetallic conduit
d. any of these
What is "c"- Liquidtight flexible nonmetallic conduit
(NEC 356.10(1))
9. A 750 watt heating element will draw ____ amps at 120 volts. The element is rated to operate at 120 volts.
a. 6.25 b. 19.2 c. 7.81 d. 2.03
What is "a"-
I=Ea/R
where R = (ENP)2/PNP= (120)2/750= 19.2 ohms =>
I=E2/R = 120/19.2 = 6.5 amps
14. 22oC = ____ oF
a. -18 b. 54 c. 44 d. 18 e. 72
What is "e"- 72
[(22) x (9 / 5)] + 32 = 71.6 ~ 72oF
47. ____ protection must be provided for all 125-volt, single phase, 20-ampere residential bathroom receptacles.
a. GFCI b. AFCI c. IDCI d. none of these
What is "a"- GFCI
(NEC 210.8(A)(5))
25. How many 12 AWG conductors can be installed in four 3" x 2" x 2" device boxes ganged together, according to the NEC?
a. 4 b. 15 c. 20 d. 18 e. 17
What is "e"- 17
NEC 314.16(B), NEC 314.16(A)Table
49. Power in a series circuit of three resistive elements uses which formula?
a. PT = P1 + P2 + P3
b. PT = P1 = P2 = P3
c. PT = 1 ÷ [ 1/P1 + 1/P2 + 1/P3 ]
What is "a"-PT = P1 + P2 + P3
16. One meter equals _____ inches.
a. .3937 b. 3.937 c. 39.37 d. 393.7
What is "c"- 39.37
11. There are 67 questions on an exam. If you miss 8 of these questions your grade is _____ %.
a. 59 b. 67 c. 92 d. 88
What is "d"- 88%
(67-8) ÷ 67 = 59 ÷ 67 = 88.06 => 88%
63. How must a luminaire (fixture) be marked that is installed outside, exposed to weather?
a. suitable for dry locations
b. no marking is necessary
c. suitable for damp locations
d. suitable for wet locations
What is "d"- suitable for wet locations
(NEC 410.10(A))
28. How many parking lot poles can be connected to a 20-amp circuit? Each pole has 3 luminaires installed on it. Each luminaire will draw .419 amps at 480 volts. These luminairs WILL operate continuously.
a. 12 b. 38 c. 15 d. 13 e. 47
What is "a"- 12 parking lot poles
31. Type NM cable can be run in all the following locations, except _____.
I. concealed in dry locations
II. concealed in damp and moist locations
III. exterior masonry block or tile walls
a. I only b. III only c. II only
d. II & III only e. I & II only f. I & III only
What is "d"- II & III only
(NEC 334.12(B))
18. .5mΩ = ____ Ω
a. .005 b. 5 c. 500 d. .00050 e. 5,000
What is "d"- .00050
19. 21,755 watts = ______ kW
a. 2,175.5 b. 21,755,000 c. 21,755
d. 217.55 e. 21.755
What is "e"- 21.755
26. Refer to the Article 100 definition for continuous load in the NEC. According to 210.19(A) the minimum branch-circuit conductor size, before the application of any adjustment or correction factors, shall have an allowable ampacity equal to or greater than the noncontinuous load plus _____ percent of the continuous load.
a. 125 b. 80 c. 20 d. 18 e. 17
What is "a"- 125 %
24. Six metal device boxes will be ganged together to form a 6-gang box. One GFCI receptacle, four single-pole switches, and one motion switch will be installed in the box assembly. The following conductors enter the box assembly: four ungrounded conductors, five grounded conductors, five switch legs, and five grounding conductors. Also, five cable clamps are contained in the assembly. All the conductors are 12 AWG. Each of the ganged boxes will have to be 3" x 2" x _____.
a. 23/4" b. 31/2" c. 21/2" d. 2" e.21/4"
What is "e"- 2 1/4"
6 yokes = 12
14 conductors =14
5 grounds= 1
5 cable clamps =1
total conductors= 28 * 2.25=63
63/6= 10.5 cu.inches => 2 1/4" deep
60. Some portable appliances use double insulation in place of grounding to provide shock protection to users. Double-insulated appliances normally have _____ power cords and attachment plug caps.
a. three-wire b. 16 AWG or larger
c. Type SJT d. two-wire
What is "d"- two-wire