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1. Recommended maximum voltage drops are located in ________.

NEC Article 100

NEC Article 210.10

NEC Section 240.21(B)(2)

NEC Section 210.19(A)(1)

Question 1 of 20

2. The diameter (in inches. of a conductor with a diameter of 40 mils is ________.

0.05"

0.02"

0.06"

0.04"

Question 2 of 20

3. What is the total resistance of a two-wire circuit that spans a total distance of 1,650' each way if the conductor resistance is 0.148V per 1,000'?

0.8764V

0.4884V

0.5342V

0.3662V

Question 3 of 20

4. Which of the following refers to the relative hardness of a conductor?

Temper

Reactance

Stranding

Amperage

Question 4 of 20

5. Correction factors for reductions due to high ambient temperatures are found in ________.

NEC Chapter 9, Table 8

NEC Article 210.21

NEC Chapter 9, Table 1

NEC Tables 310.15(B)(2)(a)

Question 5 of 20

6. What is the total resistance of a two-wire circuit that spans a distance of 200' each way if the resistance per 1,000' is 1.21V?

0.266V

0.245V

0.484V

0.310V

Question 6 of 20

7. The normal location to provide overcurrent protection in an electrical circuit is ________.

where the conductor receives its supply

where the conductor terminates

at the last point in the circuit

at the outlet

Question 7 of 20

8. A correction factor must be applied if the ambient temperature is above ________.

86°F

30°F

36°F

80°F

Question 8 of 20

9. How much of a correction factor is needed if the ambient temperature is 40°C?

0.77

0.82

0.28

0.57

Question 9 of 20

10. An acceptable method of identifying grounded conductors larger than No. 6 AWG is by tagging them or marking them ________.

blue

green

white

black

Question 10 of 20

11. What color is reserved for identifying the high leg of three-phase, four-wire system?

Orange

Grey

White

Green

Question 11 of 20

12. To keep the voltage drop of a 277V circuit to a maximum of 3%, what would be the maximum allowable voltage drop?

5.3V

9.2V

8.3V

7.5V

Question 12 of 20

13. Which of the following must be considered when determining the size of the conductor required to connect an electrical load to the source of supply?

Type of conductor insulation

Number of strands

Permissible voltage drop

Frequency of load operation

Question 13 of 20

14. The recommended maximum voltage drop for conductors, feeders, and branch circuits combined is ________.

7%

9%

5%

3%

Question 14 of 20

15. To keep the voltage drop of a 120V circuit to a maximum of 3%, the maximum voltage drop allowed would be ________.

3.6V

7.5V

6.6V

2.6V

Question 15 of 20

16. Which of the following is the least flexible form of a conductor?

Stranded wire

Coated wire

Compacted wire

Solid wire

Question 16 of 20

17. The square mil area of a conductor that is 0.250" on all sides is ________.

62,500 mils2

55,000 mils2

75,600 mils2

80,200 mils2

Question 17 of 20

18. The physical properties of a No. 4/0 copper conductor would be found in ________.

NEC Table 310.15(B.(7)

NEC Table 310.15(B)(16)

NEC Chapter 9, Table 8

NEC Chapter 9, Table 1

Question 18 of 20

19. The most common conductors used for light and power installations range from ________.

No.16 AWG to No. 18 AWG

4/0 to No. 14 AWG

1/0 to No. 11 AWG

2/0 to No. 12 AWG

Question 19 of 20

20. If seven No. 10 AWG current-carrying conductors are installed in a raceway where the ambient temperature is 70°F, the allowable ampacity must be ________.

reduced to 60% of its value

increased by 15%

increased by 20%

reduced to 80% of its value

Question 20 of 20

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