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1. The NEC® section that governs electrical connections and splices is ________.

NEC Section 110.14

NEC Table 312.4

NEC Article 725

NEC Section 240.21

Question 1 of 20

2. Heat-shrink insulators are intended to provide ________.

additional crimping force on the terminal

rating for duty at increased voltages

strain relief and mechanical protection

suitability for cold weather duty

Question 2 of 20

3. When used in control cable, which of the following must be grounded in order to be effective?

Crimp connectors

Drain wires

Screw terminals

Conductors

Question 3 of 20

4. To properly install heat-shrink insulators, ________.

use PVC cement on the insulator before applying any heat

apply heat for a few seconds and then install the insulator

slip the insulator over the connector and apply heat for a few seconds

tape the insulator in place before applying heat

Question 4 of 20

5. How can you determine the wire size that can be used effectively with an insulated barrel crimp connector?

It is the largest size of wire you can fit into the barrel.

It is the same as the bolt or screw size permitted.

It is indicated by the color-coding of the insulation on the connector.

It is referenced by catalog number.

Question 5 of 20

6. A good electrical connection should ________.

have a resistance of no more than 25 ohms

be mechanically and electrically secure

last for approximately 90 days without any maintenance or repairs

have a resistance of no more than 13 ohms

Question 6 of 20

7. To determine the correct connector size for MC cable, ________.

check the NEC® code

use the correct color coded connector

refer to the manufacturer's literature

use the smallest connector that will fit the conductor

Question 7 of 20

8. To position cable so that it is not under tension, it is necessary to ________.

shield conductors

brace conductors for short circuit stresses

terminate conductors

train conductors

Question 8 of 20

9. Burnishes, nicks, and scrapes are generally the result of which of the following?

Poorly insulated conductors

Mechanical vibration

Poorly stripped conductors

Oscillatory motion

Question 9 of 20

10. A true statement concerning solid versus stranded conductors is ________.

the same size stripping tool may be used for both

there is no difference in the two types

the diameters are different

the wire diameters are the same in both types

Question 10 of 20

11. Which of the following is true of drain wires in fire alarm and instrumentation cable?

They should be No. 24 AWG or smaller.

Only one end is typically grounded.

They should be taped back on both ends.

They should be twisted.

Question 11 of 20

12. When installing mechanical connectors, which of the following is used to prevent the formation of surface oxides?

An oxide-stabilization joint compound

An oxide-inhibiting joint compound

An oxide-neutral joint compound

An oxide-promoting joint compound

Question 12 of 20

13. When stripping conductors, be sure to ________.

use cutting tools with jaws that butt against each other

cut the insulation so that no frayed pieces or threads extend past the point of cutoff

retwist and tighten the wire strands

make a chisel point on the conductor end

Question 13 of 20

14. Before a splice or connection can be made to a Type THHN conductor, the ________.

ends should be wrapped with THHN tape

conductor ends must be stripped and cleaned

length must be measured

thickness of the insulation must be measured

Question 14 of 20

15. How should terminal space be measured from the end of the lug or wire connector?

At a 90° angle

Starting at the opposite end

In a straight line

Diagonally from the lug to the point where the wire leaves the terminal

Question 15 of 20

16. Which of the following inscriptions on a wire connector indicates that it is designed for use on both copper and aluminum wire?

AL-AL

AL-CU

CSA

Question 16 of 20

17. Which of the following eliminates the need for taping and the use of filler tape?

Heat-shrink insulator

Parallel-tap connector

Motor connection kit

Wire nut

Question 17 of 20

18. Stripped wire should be inserted into the barrel of the crimper until ________.

the wire is visible through the inspection opening

90% of the strands are inside the barrel

the insulation is just inside the barrel

the insulation butts against the forward stop

Question 18 of 20

19. Wire connectors marked only with the wire size should only be used on ________.

THWN conductors

copper conductors

aluminum conductors

aluminum or copper conductors

Question 19 of 20

20. The best electrical tape to use as a protective overwrap on high-voltage cables is ________.

vinyl plastic

high-temperature silicone rubber

glass cloth

rubber

Question 20 of 20

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