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1. What should be the first step in calculating the radius of a bend when the conduit runs are different sizes?

Calculate the outside diameter of the adjacent conduit

Determine the distance between the two runs of conduit

Determine the radius of the innermost bend

Calculate one-half the outside diameter of the innermost conduit

Question 1 of 20

2. The two dimensions an electrician must know when making a 90° stub bend are the ________.

conduit diameter and rise

bend radius and conduit diameter

desired rise and take-up distance

take-up distance and conduit diameter

Question 2 of 20

3. When making bends on short lengths of conduit, the shoe may be prevented from creeping by ________.

clamping the conduit

screwing a coupling onto the conduit

filing a rough surface on the conduit

wrapping a rag around the conduit

Question 3 of 20

4. What is the developed length for a 15° saddle bend if the centerline radius is 25"?

13.1"

19.64"

26.57"

39.25"

Question 4 of 20

5. How much conduit is needed if the rise is 15", the leg length is 10", and the gain is 8.6"?

33.6"

36.4"

16.4"

13.6"

Question 5 of 20

6. According to the NEC®, how many quarter bends are allowed in any one conduit run between outlet boxes?

Question 6 of 20

7. The NEC® specifies the minimum radius of conduit bends because ________.

bending equipment cannot produce tighter bends

installation of additional pull boxes is more efficient

the insulation on conductors could be damaged as it is pulled

the internal diameter of the conduit may be increased

Question 7 of 20

8. Which combination of bends between pull points is allowed by the NEC®?

Two 45° offsets, an elbow, and three 15° kicks

Two elbows, two 45° offsets, and two 15° kicks

Two 60° saddles, an elbow, two 45° offsets, and three 15° kicks

One elbow, one 120° saddle, and two 45° offsets

Question 8 of 20

9. A single change in direction of less than 90° is known as a(n) ________.

elbow

saddle

offset

kick

Question 9 of 20

10. To prevent a one-shot bending shoe from digging in when bending rigid aluminum, you should ________.

use a size larger diameter shoe than the conduit

coat the shoe with WD-40® or petroleum jelly

wrap the conduit with rags

operate the hydraulic pump rapidly

Question 10 of 20

11. How can dog legs be avoided when making offset bends?

By rebending everything for accuracy

By making sure all bends are 6" from the previous bend

By making the two kicks perfectly parallel

By making sure all bends are 90 degrees

Question 11 of 20

12. Hydraulic benders are capable of bending rigid pipe up to and including ________.

4" in diameter

2-1⁄2" in diameter

3" in diameter

6" in diameter

Question 12 of 20

13. Which of the following will produce an offset in a conduit run?

Improperly calculated sweep bends

Two kick bends in opposite directions

A single change in direction

A small obstruction being crossed

Question 13 of 20

14. Three-inch rigid conduit is bent using a(n) ________.

speed bender

mechanical bender

hydraulic bender

electric bender

Question 14 of 20

15. When bending smaller sizes of conduit, an advantage can be gained by using which of the following?

Mechanical bending equipment

Electric conduit benders

Hand bends

Bending protractors

Question 15 of 20

16. Which of the following is a type of bending shoe?

Axial

Segment

Concentric

Radial

Question 16 of 20

17. Springback is a term used to describe the ________.

return of the bender shoe to its normal position after a bend

tendency of the conduit to relax to a bend angle slightly less than that indicated on the bender pointer when the bender is released

amount of take-up required for a sweep bend

reaction of a power bender after the machine is jogged

Question 17 of 20

18. What is the developed length for an elbow bend in 5" conduit if the centerline radius is 20"?

39.25"

7.85"

25"

31.4"

Question 18 of 20

19. Which of the following tools is helpful when making multiple bends at the same angle?

One-shot shoe

Bending gauge

Bending shot

Bending protractor

Question 19 of 20

20. One of the characteristics of aluminum conduit is that it ________.

corrodes easily

is easy to bend consistently

has high ground impedance

is lightweight

Question 20 of 20

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