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1. EMT is ________.

often referred to as thinwall conduit and is too thin to be threaded

conduit that has been given a thin coating of PVC

conduit that is constructed of metal thick enough to permit the cutting of pipe threads at each end

steel conduit coated with a black enamel

Question 1 of 20

2.

Which kind of anchor is shown in the figure above?

Drop-in

Drive-in

Toggle bolt

Self-drilling

Question 2 of 20

3. Which of the following types of conduit bodies has a 90∘ connector with the cover on the left?

Type LB

Type LR

Type LL

Type LRL

Question 3 of 20

4. The voltage drop of conductors carrying alternating current in PVC will be less than that of ________.

LFNC

identical conductors in flexible conduit

identical conductors in steel conduit

HDPE

Question 4 of 20

5. Which types of conduit bodies are used to provide a pull point on a straight conduit run?

Type C

Type T

Type X

Type L

Question 5 of 20

6. What type of conduit is used to connect machines that vibrate during operation?

Black enamel steel conduit

Aluminum

RMC

Flexible metal conduit

Question 6 of 20

7. Which of the following is true of aluminum conduit?

It is too thin to be threaded.

It requires more maintenance.

It does not require supplementary corrosion protection when used in concrete.

It is more resistant to wet environments.

Question 7 of 20

8. Which of the following shall only be applied when the number of current-carrying conductors in a wireway exceeds three?

Trough crosses

Tee fittings

End plates

Derating factors

Question 8 of 20

9. To act as a moisture seal, an outer covering of liquidtight, sunlight-resistant flexible material is placed around ________.

rigid polyvinyl chloride conduit

liquidtight flexible metal conduit

liquidtight flexible nonmetallic conduit

high-density polyethylene conduit

Question 9 of 20

10. NEC Article 386 contains ________.

regulations for combination raceways

information on multi-outlet assemblies

a list of the various types of special raceways

the installation specifications of surface metal raceways

Question 10 of 20

11. What is the maximum allowable spacing between horizontal wireway supports?

15'

10'

20'

8'

Question 11 of 20

12. The purpose of a sealing fitting is to ________.

carry wires through conduit and other types of raceways

prevent the passage of gases, vapors, and flames through a conduit

bundle wires and cables together

connect conduit to boxes

Question 12 of 20

13. Which of the following conduits has a wall thickness less than that of RMC but thicker than EMT?

LFNC

IMC

HDPE

PVC

Question 13 of 20

14. What is another name for a standoff support?

Beam clamp

Trapeze

Minerallac®

Clamp back

Question 14 of 20

15. Which of the following are used to prevent damage to PVC caused by temperature changes?

Hinged couplings

Flex connectors

Expansion couplings

Combination couplings

Question 15 of 20

16. Which types of conduit bodies are used to join four intersecting conduits?

Type X

Type LL

Type LR

Type T

Question 16 of 20

17. What type of conduit is approved for direct burial?

IMC

EMT

HDPE

RMC

Question 17 of 20

18. What type of conduit should be used where corrosion is a factor?

IMC

PVC

Black enamel steel conduit

RMC

Question 18 of 20

19. EMT must be supported every ________.

3 feet

10 feet

15 feet

5 feet

Question 19 of 20

20. Which of the following can be found in NEC Article 344?

IMC support requirements

IMC marking requirements

Equipment grounding conductor sizes

RMC support requirements

Question 20 of 20

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