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1. Which of the following is true of shielding in instrumentation circuits?

It is grounded at every instrument.

It is not grounded.

It is grounded by floating the ground at both ends of the wire.

It is grounded at one end only.

Question 1 of 20

2. Size 4/0 wire has a ________.

smaller cross-sectional area than size 3/0

greater resistance than size 3/0

smaller diameter than size 3/0

greater cross-sectional area than size 3/0

Question 2 of 20

3. The United States uses which of the following standard systems of wire sizes?

Manufacturer's Gauge

American Wire Gauge

Manufacturer's Foundation

International Electrotechnical Commission

Question 3 of 20

4. A grounding wire may be which of the following colors?

Black

Blue

Yellow

Green

Question 4 of 20

5. It is important to do which of the following when conductors are fed into long runs of conduit?

Make sure the wires are straight and do not cross over each other.

Put back-tension on the conductors to prevent kinking.

Hold tension on the spools so that excess wire does not spill onto the floor.

Fill the conduit with lubricant.

Question 5 of 20

6. Which of the following types of cable is suitable for direct burial?

Type MC

Type NM

Type UF

Type NMC

Question 6 of 20

7. The cable that is used for feeders and branch circuits is ________.

Type UF

Type MV

Type MC

Type TC

Question 7 of 20

8. Which of the following describes Type FCC cable?

Fixture cable circuit

Fine conductive cable

Fine concentric copper

Flat conductor cable

Question 8 of 20

9. Which of the following increases the flexibility of a wire?

Stranding

Nylon

Teflon®

Linking

Question 9 of 20

10. The operating temperature of the circuit is a primary factor in the selection of a ________.

fixture wire

channel wire assembly

cable

shield drain

Question 10 of 20

11. Where can you find the ampacity of conductors for given conditions?

NEC Tables 310.15(B)(16) through 310.15(B)(19)

NEC Table 400.4

NEC Article 340

NEC Chapter 9, Table 8

Question 11 of 20

12. Which of the following is not shown with cable markings?

Prohibited uses

Voltage rating

Wire size

Cable type

Question 12 of 20

13. Which of the following types of cables may be installed in concealed locations?

Type NM and NMC

Type UF and MC

Type UF and NMC

Type MC and NM

Question 13 of 20

14. According to the standard system of wire sizes in the United States, which ranges from 50 to 1, a larger number represents ________.

smaller wire

solid wire

stranded wire

larger wire

Question 14 of 20

15. Which of the following describes Type TC cable?

It comes in sizes No. 12 AWG and larger for copper.

It has three to five flat conductors separated and enclosed in a flame-retardant assembly.

It consists of two or more insulated conductors twisted together and covered with a nonmetallic jacket.

It can be installed in a U-channel surface metal raceway with one side open.

Question 15 of 20

16. In addition to being both flame-retardant and moisture-resistant, what characteristic does Type NMC cable have?

It can carry a higher voltage.

It is fungus- and corrosion-resistant.

It can be used in multifamily dwellings.

It cannot be used in ducts or plenums.

Question 16 of 20

17. In two-conductor cable, the high side or hot wire is ________.

black

red

green

grey

Question 17 of 20

18. Type NMS cable is described as ________.

metal-clad cable

nonmetallic slit cable

nonmetallic-sheathed cable

medium voltage cable

Question 18 of 20

19. When used as a service-entrance cable, Type SE cable must be installed as specified in ________.

NEC Section 210.5(C)

NEC Section 402.3

NEC Section 110.12

NEC Article 230

Question 19 of 20

20. Which of the following cables should include a yellow color-coded conductor?

Three-conductor cable

Two-conductor cable

Four-conductor cable

Five-conductor cable

Question 20 of 20

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