Conduit Fabrication L2 Lesson 4

Question 1

Which of the following is not a reason why you might have to make a 90° bend using segmented bends instead of a “one-shot” bend?

a. To increase the radius of the bend beyond the radius available with a one-shot shoe.

b. To closely follow the surface of a circular tank, duct, or conveyor.

c. To bend a large (5- or 6-inch) conduit for which one-shot shoes are not available.

d. To reduce the overall cost of the job by not requiring special bending equipment.

Question 2

When the bends in a number of conduits are made around a common center point, they

are called ? bends.

a.

concentric

b.

offset

c.

segmented

d.

uniform

Question 3

Each individual bend used to form a segmented bend is called a(n) ? .

a.

load

b.

part

c.

segment

d.

shot

Question 4

Which two of the following items are not variables when laying out a segmented bend of

a given radius?

a. Conduit Size

b. Type of Bender

c. Desired Radius

d. Completed Bend Angle

e. Conduit Type

f. Number of Shots or Segments

g. Distance Between Shots

h. Developed Length

i. Ram Travel

j. Degrees per Shot

a.

a. and j.

b.

b. and i.

c.

b. and j.

d.

c. and j.

Question 5

When making segmented bends, the bend radius is the distance from the center point of

the circle or object to ? .

a.

the centerline of the conduit

b.

the edge of the obstruction

c.

the inside edge of the conduit

d.

the outside edge of the conduit

Question 6

“Developed Length” is the term used to describe the length of conduit needed to form a

bend.

Select one:

True

False

Question 7

As a rule, the individual shots used to form a segmented bend should not exceed ? per

shot, and the distance between bends should not exceed ? for exposed work.

a.

4° / 6"

b.

6° / 4"

c.

5° / 7"

d.

7° / 5"

Question 8

Identify the formula used to determine the distance between shots when making a

segmented bend.

a. Radius X 1.57

b. Developed Length / Number of Shots

c. Bend Angle / Number of Shots

d. Circumference / 4

Question 9

A 90° segmented bend made with 23 shots would have each shot bent to ? .

a.

2.685°

b.

3.139°

c.

3.913°

d.

9.133°

Question 10

As a rule, is it easier to use an even number of shots when laying out a segmented bend.

Select one:

True

False

Question 11

You have measured around the outside of a tank and found the circumference to be 22' 6

1/2". What will be the distance to the centerline (radius of conduit), in inches, of a 2 1/2"

rigid metal conduit mounted with its inside edge 6" away from the outside of the tank?

Note: The values calculated for this question may be used for additional questions.

(Round the answer to the nearest 1/16". Answer the question in the form of a decimal.)

Question 12

You have measured around the outside of a tank and found the circumference to be 22' 6

1/2". What will be the developed length of the bend if you wish to form a 90° bend to go

around the tank (use the value calculated in the previous question)? Note: The values

calculated for this question may be used for additional questions.

a.

78 13/16 "

b.

79"

c.

79 5/16 "

d.

79 11/16 "

Question 13

You have measured around the outside of a tank and found the circumference to be 22' 6

1/2". If you wish to lay out this bend using 21 shots, what will be the distance between

shots (use the value calculated in the previous question)? Note: The values calculated for

this question may be used for additional questions. (Round the answer to the nearest

1/16".)

a.

3 1/2"

b.

3 3/4"

c.

4"

d.

4 1/8"

Question 14

You have measured around the outside of a tank and found the circumference to be 22' 6

1/2". What will be the degree of bend for each shot? (Round the answer to the nearest

10th of a degree. Answer the question in the form of a decimal.)

Question 15

Using a 10' long piece of strut as a straightedge, you are trying to determine the outside

diameter of a grain storage silo. You and your partner very carefully measure from the

ends of the straightedge, squarely, in to the wall of the silo and find that the “H”

distance is 14 3/4 " at both ends. What is the radius of the silo in inches? Note: The values

calculated for this question may be used for additional questions. (Round the answer to

the nearest 1/8 ".)

a.

122 1/2 "

b.

123 1/8 "

c.

129 3/8 "

d.

131 1/2 "

Question 16

Using a 10' long piece of strut as a straightedge, you are trying to determine the outside

diameter of a grain storage silo. You and your partner very carefully measure from the

ends of the straightedge, squarely, in to the wall of the silo and find that the “H”

distance is 14 3/4 " at both ends. What would be the developed length of a 30° bend to

go around the silo if you were using 5" RMC and a spacing of 8" between the silo and the

inside edge of the conduit? Note: The values calculated for this question may be used for

additional questions. (Round the answer to the nearest 1/16 ".)

a.

72.5"

b.

72 7/8 "

c.

73 1/16 "

d.

73 5/8 "

Question 17

You need to install a conduit around the inside of a large sewer pipe in order to run

wiring to a level sensing instrument. Using a 78" long piece of angle iron to span the

arch of the pipe, you find that the value for “H” is 7 1/2 ". What is the radius of the sewer

pipe? Note: The values calculated for this question may be used for additional questions.

(Round the answer to the nearest 1/8 ".)

a.

105 1/8 "

b.

105 5/8 "

c.

106 1/8 "

d.

106 5/8 "

Question 18

You need to install a conduit around the inside of a large sewer pipe in order to run

wiring to a level sensing instrument. Using a 78" long piece of angle iron to span the

arch of the pipe, you find that the value for “H” is 7 1/2 ". What will be the developed

length for a piece of 3/4 " RMC run 45° around the inside of the sewer pipe and supported

to the pipe by means of one-hole straps? (Round the answer to the nearest 1/8 ".)

a.

82 3/8 "

b.

82 7/8 "

c.

83"

d.

83 1/2 "

Question 19

What is the distance (D1) from the end of the conduit to the start of the developed

length? (Round the answer to the nearest 1/16 ".)

Based upon the information in the photos, the hook of the bender should be facing the

top 4-inch square box.

a.

20"

b.

20 1/2"

c.

21 1/16 "

d.

22"

Question 20

What is the developed length (DL) of the bend? (Round the answer to the nearest 1/16".)

a.

75 1/16 "

b.

75 3/8 "

c.

76"

d.

21 1/16 "

Question 21

What is the spacing (S) between the shots? (Round the answer to the nearest 1/16 ".)

a.

3 1/16 "

b.

3 9/16 "

c.

4 1/16 "

d.

4 1/2 "

Question 22

What is the distance (D1) from the end of the conduit to the start of the developed

length? (Round the answer to the nearest 1/8 ".)

a.

13 1/4 "

b.

13 7/8 "

c.

14 1/8 "

d.

14 1/2 "

Question 23

What is the developed length (DL) of the bend? (Round the answer to the nearest 1/16 ".)

a.

65 1/4 "

b.

65 7/8 "

c.

66 1/8 "

d.

66 1/2 "

Question 24

What is the spacing (S) between the shots? (Round the answer to the nearest 1/16 ".)

a.

2 1/8 "

b.

2 7/8 "

c.

3 1/16 "

d.

3 11/16 "

Question 25

What is the distance (D1) from the end of the conduit to the start of the developed

length? (Round the answer to the nearest 1/16 ". Answer the question in the form of a

decimal.)

Question 26

What is the developed length (DL) of the bend? (Round the answer to the nearest 1/8 ".)

a.

50 1/4 "

b.

50 3/4 "

c.

51 1/4 "

d.

51 3/4 "

Question 27

What is the spacing (S) between the shots? (Round the answer to the nearest 1/8 ".)

a.

3"

b.

3 3/8 "

c.

4"

d.

4 3/8 "

Question 28

What is the distance (D1) from the end of the conduit to the start of the developed

length? (Round the answer to the nearest 1/16".)

a.

7 3/4 "

b.

8 1/8 "

c.

8 11/16 "

d.

8 15/16 "

Question 29

What is the developed length (DL) of the bend? (Round the answer to the nearest 1/8".)

a.

92 3/4 "

b.

93 1/8 "

c.

93 5/8 "

d.

94 1/4 "

Question 30

What is the spacing (S) between the shots? (Round the answer to the nearest 1/8 ".)

a.

2 3/4 "

b.

3 1/4 "

c.

3 3/4 "

d.

4 1/4 "

Question 31

What is the distance (D1) from the end of the conduit to the start of the developed

length? (Round the answer to the nearest 1/16 ".)

a.

42 3/16"

b.

43"

c.

43 3/8 "

d.

43 13/16 "

Question 32

What is the developed length (DL) of the bend? (Round the answer to the nearest 1/16 ".)

a.

32 1/4 "

b.

32 7/8 "

c.

34 9/16 "

d.

37 3/8 "

Question 33

What is the spacing (S) between the shots? (Round the answer to the nearest 1/16 ".)

a.

1 1/2 "

b.

2"

c.

2 5/16 "

d.

3"

Question 34

What is the distance (D1) from the stub end of the conduit to the start of the developed

length? Note: The values calculated for this question may be used for additional

questions. (Round the answer to four decimal places to find the nearest 1/16 ". Answer the

question in the form of a decimal.)

Question 35

What is the distance (D2) from the leg end of the conduit to the end of the developed

length? Note: The values calculated for this question may be used for additional

questions. (Round the answer to the nearest 1/16 ".)

a.

17 3/16 "

b.

17 9/16 "

c.

18 3/16 "

d.

18 9/16 "

Question 36

What is the developed length (DL) of the bend? Note: The values calculated for this

question may be used for additional questions. (Round the answer to the nearest 1/8 ".)

a.

46 7/8 "

b.

47 1/8 "

c.

47 7/8 "

d.

48 1/8 "

Question 37

What is the spacing (S) between the shots? Note: The values calculated for this question

may be used for additional questions. (Round the answer to the nearest 1/8 ".)

a.

2 3/4 "

b.

3 1/8 "

c.

3 7/8 "

d.

4 1/4 "

Question 38

What is the total length (TL) of conduit needed? (Round the answer to the nearest 1/8".)

a.

76 3/4 "

b.

77 1/4 "

c.

77 3/4 "

d.

78 1/4 "

Question 39

What is the distance (D1) from the stub end of the conduit to the start of the developed

length? Note: The values calculated for this question may be used for additional

questions. (Round the answer to two decimal places to find the nearest 1/16 ". Answer the

question in the form of a decimal.)

Question 40

What is the distance (D2) from the leg end of the conduit to the end of the developed

length? Note: The values calculated for this question may be used for additional

questions. (Round the answer to three decimal places to find the nearest 1/16 ". Answer

the question in the form of a decimal.)

Question 41

What is the developed length (DL) of the bend? Note: The values calculated for this

question may be used for additional questions. (Round the answer to the nearest 1/16 ".)

a.

56 3/4 "

b.

57 1/16 "

c.

57 5/16 "

d.

58 1/16 "

Question 42

What is the spacing (S) between the shots? Note: The values calculated for this question

may be used for additional questions. (Round the answer to the nearest 1/4 ".)

a.

2 1/4 "

b.

2 3/4 "

c.

3"

d.

3 1/4 "

Question 43

What is the total length (TL) of conduit needed? (Round the answer to find the nearest

1/16 ".)

a.

72 3/4 "

b.

73"

c.

73 3/16 "

d.

74"

Question 44

Presume that you are going to lay out and fabricate the conduits so that the ends of all

of the conduits will be aligned when the job is complete. All of the bends will be laid out

using 18 shots at 5° each.

What is the centerline radius of Conduit B? Note: The values calculated for this question

may be used for additional questions. (Round the answer to find the nearest 1/8".)

a.

34"

b.

34 1/2 "

c.

35"

d.

35 1/2 "

Question 45

Presume that you are going to lay out and fabricate the conduits so that the ends of all

of the conduits will be aligned when the job is complete. All of the bends will be laid out

using 18 shots at 5° each.

What is the stub length for Conduit B? Note: The values calculated for this question may

be used for additional questions. (Round the answer to the nearest 1/8 ".)

a.

47"

b.

48"

c.

49"

d.

50"

Question 46

Presume that you are going to lay out and fabricate the conduits so that the ends of all

of the conduits will be aligned when the job is complete. All of the bends will be laid out

using 18 shots at 5° each.

What is the leg length for Conduit B? Note: The values calculated for this question may

be used for additional questions. (Round the answer to find the nearest 1/8 ".)

a.

65"

b.

65 1/2 "

c.

70"

d.

70.5"

Question 47

Presume that you are going to lay out and fabricate the conduits so that the ends of all

of the conduits will be aligned when the job is complete. All of the bends will be laid out

using 18 shots at 5° each.

What is D1 for Conduit B? Note: The values calculated for this question may be used for

additional questions. (Round the answer to find the nearest 1/16 ".)

a.

11 9/16 "

b.

11 15/16 "

c.

12 3/8 "

d.

12 7/8 "

Question 48

Presume that you are going to lay out and fabricate the conduits so that the ends of all

of the conduits will be aligned when the job is complete. All of the bends will be laid out

using 18 shots at 5° each.

What is D2 for Conduit B? Note: The values calculated for this question may be used for

additional questions. (Round the answer to find the nearest 1/16 ".)

a.

28 7/8 "

b.

29 1/16 "

c.

29 11/16 "

d.

32 "

Question 49

Presume that you are going to lay out and fabricate the conduits so that the ends of all

of the conduits will be aligned when the job is complete. All of the bends will be laid out

using 18 shots at 5° each.

What is the DL for Conduit B? Note: The values calculated for this question may be used

for additional questions. (Round the answer to find the nearest 1/16 ".)

a.

54 3/16 "

b.

54 15/16 "

c.

55 1/4 "

d.

55 3/4 "

Question 50

Presume that you are going to lay out and fabricate the conduits so that the ends of all

of the conduits will be aligned when the job is complete. All of the bends will be laid out

using 18 shots at 5° each.

What is the spacing between shots (S)? Note: The values calculated for this question

may be used for additional questions. (Round the answer to find the nearest 1/16 ".)

a.

2 1/4 "

b.

2 7/8 "

c.

3 1/16 "

d.

3 11/16 "

Question 51

Presume that you are going to lay out and fabricate the conduits so that the ends of all

of the conduits will be aligned when the job is complete. All of the bends will be laid out

using 18 shots at 5° each.

What is the total length (TL) of Conduit B? Note: The values calculated for this question

may be used for additional questions. (Round the answer to find the nearest 1/16)

a.

94 13/16 "

b.

95 "

c.

95 9/16 "

d.

96 "

Question 52

Presume that you are going to lay out and fabricate the conduits so that the ends of all

of the conduits will be aligned when the job is complete. All of the bends will be laid out

using 18 shots at 5° each.

What is the centerline radius of Conduit A? Note: The values calculated for this question

may be used for additional questions. (Round the answer to find the nearest 1/16 ".)

a.

39 3/4 "

b.

40 "

c.

40 7/8 "

d.

41 3/8 "

Question 53

Presume that you are going to lay out and fabricate the conduits so that the ends of all

of the conduits will be aligned when the job is complete. All of the bends will be laid out

using 18 shots at 5° each.

What is the stub length of Conduit A? Note: The values calculated for this question may

be used for additional questions. (Round the answer to find the nearest 1/16 ".)

a.

52 7/8 "

b.

53 1/8 "

c.

53 7/8 "

d.

54 "

Question 54

Presume that you are going to lay out and fabricate the conduits so that the ends of all

of the conduits will be aligned when the job is complete. All of the bends will be laid out

using 18 shots at 5° each. Be prepared to show your calculations on a separate sheet of

paper.

What is the leg length? Note: The values calculated for this question may be used for

additional questions. (Round the answer to three decimal places.)

Question 55

Presume that you are going to lay out and fabricate the conduits so that the ends of all

of the conduits will be aligned when the job is complete. All of the bends will be laid out

using 18 shots at 5° each.

What is D1 for Conduit A? Note: The values calculated for this question may be used for

additional questions. (Round the answer to find the nearest 1/16 ".)

a.

11 3/16 "

b.

11 9/16 "

c.

12 1/8"

d.

12 1/2 "

Question 56

Presume that you are going to lay out and fabricate the conduits so that the ends of all

of the conduits will be aligned when the job is complete. All of the bends will be laid out

using 18 shots at 5° each.

What is D2 for Conduit A? Note: The values calculated for this question may be used for

additional questions. (Round the answer to find the nearest 1/16 ".)

a.

28 7/8 "

b.

29 1/16 "

c.

29 5/8 "

d.

30"

Question 57

Presume that you are going to lay out and fabricate the conduits so that the ends of all

of the conduits will be aligned when the job is complete. All of the bends will be laid out

using 18 shots at 5° each.

What is the DL of Conduit A? Note: The values calculated for this question may be used

for additional questions. (Round the answer to find the nearest 1/16 ".)

a.

63 3/16 "

b.

64 "

c.

64 3/16 "

d.

65 "

Question 58

Presume that you are going to lay out and fabricate the conduits so that the ends of all

of the conduits will be aligned when the job is complete. All of the bends will be laid out

using 18 shots at 5° each.

What is the spacing between shots (S)? Note: The values calculated for this question

may be used for additional questions. (Round the answer to find the nearest 1/16 ".)

a.

3"

b.

3 3/16 "

c.

3 9/16 "

d.

4"

Question 59

Presume that you are going to lay out and fabricate the conduits so that the ends of all

of the conduits will be aligned when the job is complete. All of the bends will be laid out

using 18 shots at 5° each.

What is the total length (TL) of Conduit A? Note: The values calculated for this question

may be used for additional questions. (Round the answer to find the nearest 1/16 ".)

a.

104 13/16 "

b.

105 3/8 "

c.

105 7/8 "

d.

107"

Question 60

Presume that you are going to lay out and fabricate the conduits so that the ends of all

of the conduits will be aligned when the job is complete. All of the bends will be laid out

using 18 shots at 5° each.

What is the centerline radius of Conduit C? Note: The values calculated for this question

may be used for additional questions. (Round the answer to find the nearest 1/16 ".)

a.

29 1/2 "

b.

29 13/16 "

c.

29"

d.

29 3/8 "

Question 61

Presume that you are going to lay out and fabricate the conduits so that the ends of all

of the conduits will be aligned when the job is complete. All of the bends will be laid out

using 18 shots at 5° each.

What is the stub length for Conduit C? Note: The values calculated for this question may

be used for additional questions. (Round the answer to find the nearest 1/16 ".)

a.

42 1/8 "

b.

42 3/8 "

c.

42 5/8 "

d.

42 7/8 "

Question 62

Presume that you are going to lay out and fabricate the conduits so that the ends of all

of the conduits will be aligned when the job is complete. All of the bends will be laid out

using 18 shots at 5° each.

What is the leg length for Conduit C? Note: The values calculated for this question may

be used for additional questions. (Round the answer to find the nearest 1/16 ".)

a.

59 1/8 "

b.

59 3/8 "

c.

59 5/8 "

d.

59 7/8 "

Question 63

Presume that you are going to lay out and fabricate the conduits so that the ends of all

of the conduits will be aligned when the job is complete. All of the bends will be laid out

using 18 shots at 5° each.

What is D1 for Conduit C? Note: The values calculated for this question may be used for

additional questions. (Round the answer to find the nearest 1/16 ".)

a.

11"

b.

11 3/16 "

c.

11 9/16 "

d.

12"

Question 64

Presume that you are going to lay out and fabricate the conduits so that the ends of all

of the conduits will be aligned when the job is complete. All of the bends will be laid out

using 18 shots at 5° each.

What is D2 for Conduit C? Note: The values calculated for this question may be used for

additional questions. (Round the answer to find the nearest 1/16 ".)

a.

28 15/16 "

b.

29 1/16 "

c.

29 5/8 "

d.

30 "

Question 65

Presume that you are going to lay out and fabricate the conduits so that the ends of all

of the conduits will be aligned when the job is complete. All of the bends will be laid out

using 18 shots at 5° each.

What is the DL of Conduit C? Note: The values calculated for this question may be used

for additional questions. (Round the answer to find the nearest 1/16 ".)

a.

46 1/8 "

b.

46 1/2 "

c.

46 7/8 "

d.

47 1/8 "

Question 66

Presume that you are going to lay out and fabricate the conduits so that the ends of all

of the conduits will be aligned when the job is complete. All of the bends will be laid out

using 18 shots at 5° each.

What is the spacing between shots (S)? Note: The values calculated for this question

may be used for additional questions. (Round the answer to find the nearest 1/16 ".)

a.

2 "

b.

2 1/2 "

c.

2 9/16 "

d.

3 "

Question 67

Presume that you are going to lay out and fabricate the conduits so that the ends of all

of the conduits will be aligned when the job is complete. All of the bends will be laid out

using 18 shots at 5° each.

What is the total length (TL) of Conduit C? Note: The values calculated for this question

may be used for additional questions. (Round the answer to find the nearest 1/16 ".)

a.

85 3/4 "

b.

86 1/4 "

c.

86 3/4 "

d.

89 "

Question 68

Presume that you are going to lay out and fabricate the conduits so that the ends of all

of the conduits will be aligned when the job is complete. All of the bends will be laid out

using 18 shots at 5° each.

What is the centerline radius of Conduit D? Note: The values calculated for this question

may be used for additional questions. (Round the answer to find the nearest 1/16 ".)

a.

22"

b.

23"

c.

24 1/2 "

d.

25"

Question 69

Presume that you are going to lay out and fabricate the conduits so that the ends of all

of the conduits will be aligned when the job is complete. All of the bends will be laid out

using 18 shots at 5° each.

What is the stub length of Conduit D? Note: The values calculated for this question may

be used for additional questions. (Round the answer to find the nearest 1/16 ".)

a.

36 3/4 "

b.

37 1/4 "

c.

37 5/8 "

d.

37 15/16 "

Question 70

Presume that you are going to lay out and fabricate the conduits so that the ends of all

of the conduits will be aligned when the job is complete. All of the bends will be laid out

using 18 shots at 5° each.

What is the leg length for Conduit D? Note: The values calculated for this question may

be used for additional questions. (Round the answer to find the nearest 1/16 ".)

a.

53 1/2 "

b.

53 7/8 "

c.

54 1/4 "

d.

55"

Question 71

Presume that you are going to lay out and fabricate the conduits so that the ends of all

of the conduits will be aligned when the job is complete. All of the bends will be laid out

using 18 shots at 5° each.

What is D1 for Conduit D? Note: The values calculated for this question may be used for

additional questions. (Round the answer to find the nearest 1/16 ".)

a.

10 7/8 "

b.

11 1/16 "

c.

11 1/2 "

d.

11 9/16 "

Question 72

Presume that you are going to lay out and fabricate the conduits so that the ends of all

of the conduits will be aligned when the job is complete. All of the bends will be laid out

using 18 shots at 5° each.

What is D2 for Conduit D? Note: The values calculated for this question may be used for

additional questions. (Round the answer to find the nearest 1/16 ".)

a.

24 1/2"

b.

27 1/8 "

c.

29 1/16 "

d.

33 "

Question 73

Presume that you are going to lay out and fabricate the conduits so that the ends of all

of the conduits will be aligned when the job is complete. All of the bends will be laid out

using 18 shots at 5° each.

What is the DL for Conduit D? Note: The values calculated for this question may be used

for additional questions. (Round the answer to find the nearest 1/16".)

a.

27 1/2 "

b.

27 15/16 "

c.

37 1/16 "

d.

38 1/2"

Question 74

Presume that you are going to lay out and fabricate the conduits so that the ends of all

of the conduits will be aligned when the job is complete. All of the bends will be laid out

using 18 shots at 5° each.

What is the spacing between shots (S)? Note: The values calculated for this question

may be used for additional questions. (Round the answer to find the nearest 1/16 ".)

a.

2"

b.

2 1/8 "

c.

2 1/2 "

d.

2 3/4 "

Question 75

Presume that you are going to lay out and fabricate the conduits so that the ends of all

of the conduits will be aligned when the job is complete. All of the bends will be laid out

using 18 shots at 5° each.

What is the total length (TL) of Conduit D? (Round the answer to find the nearest 1/16 ".)

a.

78 3/4 "

b.

79"

c.

79 1/8 "

d.

79 5/8 "

Question 76

What is the reference point that is used for placing the shot marks on the conduit when

laying out a segmented bend?

a.

The bend radius

b.

The center of the developed length

c.

The D1 reference point

d.

The D2 reference point

The correct answer is: The center of the developed length

Question 77

Bends are always made at the Start and End marks for the developed length.

Select one:

True

False

Question 78

If the layout has been done correctly, the bend marks will be inside of the developed

length marks by one-half of the spacing between shots.

Select one:

True

False

The correct answer is 'True'.

Question 79

How can the degree of bend be determined as each shot is made in the conduit?

a.

Accurate measurements must be taken

b.

By using a high-quality bending protractor

c.

By using a straight edge and a torpedo level

d.

Any of the above

Question 80

The overall bend angle and the height of the stub should be checked when there are only

about three to five shots left to be made in a segmented 90° bend.

Select one:

True

False