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

copper conductors

aluminum conductors

aluminum or copper conductors

THWN conductors

Question 1 of 20

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

rating for duty at increased voltages

additional crimping force on the terminal

suitability for cold weather duty

strain relief and mechanical protection

Question 2 of 20

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

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

use PVC cement on the insulator before applying any heat

tape the insulator in place before applying heat

apply heat for a few seconds and then install the insulator

Question 3 of 20

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

Mechanical vibration

Poorly insulated conductors

Oscillatory motion

Poorly stripped conductors

Question 4 of 20

5. A good electrical connection should ________.

last for approximately 90 days without any maintenance or repairs

be mechanically and electrically secure

have a resistance of no more than 25 ohms

have a resistance of no more than 13 ohms

Question 5 of 20

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

there is no difference in the two types

the diameters are different

the same size stripping tool may be used for both

the wire diameters are the same in both types

Question 6 of 20

7. 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 7 of 20

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

They should be No. 24 AWG or smaller.

They should be twisted.

They should be taped back on both ends.

Only one end is typically grounded.

Question 8 of 20

9. 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 9 of 20

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

brace conductors for short circuit stresses

shield conductors

train conductors

terminate conductors

Question 10 of 20

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

Motor connection kit

Heat-shrink insulator

Wire nut

Parallel-tap connector

Question 11 of 20

12. 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 butts against the forward stop

the insulation is just inside the barrel

Question 12 of 20

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

thickness of the insulation must be measured

ends should be wrapped with THHN tape

length must be measured

conductor ends must be stripped and cleaned

Question 13 of 20

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

glass cloth

vinyl plastic

high-temperature silicone rubber

rubber

Question 14 of 20

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

In a straight line

At a 90° angle

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

Starting at the opposite end

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

CSA

AL-CU

Question 16 of 20

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

refer to the manufacturer's literature

check the NEC® code

use the correct color coded connector

use the smallest connector that will fit the conductor

Question 17 of 20

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

Conductors

Crimp connectors

Screw terminals

Drain wires

Question 18 of 20

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

NEC Article 725

NEC Section 110.14

NEC Table 312.4

NEC Section 240.21

Question 19 of 20

20. When stripping conductors, be sure to ________.

retwist and tighten the wire strands

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

make a chisel point on the conductor end

Question 20 of 20

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