Conduit Level 1 Lesson 5

place mark on tape measure

6 5/8

An over-bent 90° bend cannot be corrected and results in wasted conduit. Select one: True False

False

Take-up and gain are the same thing. Select one: True False

False

Take-up is a measurement that is added to the desired stub length in order to make a stub-up. Click on the image to view a larger version of it. Select one: True False

False

The Qualified Electrical Worker can safely assume that the bender take up values provided in charts from one manufacturer can also be used for another manufacturer's bender. Select one: True False

False

The pencil mark on the 3/4-inch EMT has been made in order to produce a 9" stub-up. A 9" stub-up will be fabricated if the conduit is bent with the arrow benchmark on the bender aligned with the pencil mark as shown, and the bender is pointed to the right. Click on the image to view a larger version of it. Select one: True False

False

The recommended way to mark a conduit for bending is to place a short pencil or marker marking where the bend will occur. Select one: True False

False

The take-up is the same for every hand bender made for the same size of conduit. Select one: True False

False

Calculate the distance to the reference mark for a 32 7/16-inch stub-up length and match it to the conduit size. 1/2" Answer 1 3/4" Answer 2 1" Answer 3 1 1/4" Answer 4

a. 27 7/16 b. 26 7/16 c. 24 7/16 d. 21 7/16

Calculate the distance to the reference mark for a 10-inch stub-up length and match it to the conduit size. 1/2" Answer 1 3/4" Answer 2 1" Answer 3 1 1/4" Answer 4

a. 5 b. 4 c. 2 d. n/a

Calculate the distance to the reference mark for a 12 3/4-inch stub-up length and match it to the conduit size. 1/2 " Answer 1 3/4" Answer 2 1" Answer 3 1 1/4" Answer 4

a. 7 3/4 b. 6 3/4 c. 4 3/4 d. n/a

A person should not exert a large amount of force on the handle of the bender when making bends in EMT. Select one: True False

True

Based upon the information in the photos, the hook of the bender should be facing the top 4-inch square box. Click on the image to view a larger version of it. Select one: True False

True

Gain can be used to determine the overall length of conduit needed prior to making a 90° bend. Select one: True False

True

Gain is the difference between the original length of a conduit and the measured length of both the "stub" and the "leg" after the 90 is formed. Select one: True False

True

In order to make a stub-up of a specified length, the take-up mark must be aligned with the arrow on the bender, and the hook of the bender must face toward the end of the conduit from which the measurement was made. Select one: True False

True

The conduit can be re-inserted in the bender and some bend added until a true 90° bend is attained for a bend that is under-bent. Select one: True False

True

The end of the conduit should be reamed after it has been cut. Select one: True False

True

The hook of the bender should have been pointing toward the end of the stub when the bend was made. Click on the image to view a larger version of it. Select one: True False

True

To figure out the take-up for a bender, make a mark on the conduit and align the mark with the arrow on the bender. Then, make a 90° bend, and measure the distance from the mark to the back of the 90. Select one: True False

True

Applying the take-up short-cut method for stub-ups, what size is this conduit? Click on the image to view a larger version of it. Select one: a. 1/2" b. 3/4" c. Neither

a. 1/2"

Given the measurements for the stub-up (17 7/8 inches) and the leg (20 5/8 inches), calculate the distance to the bending reference mark (take-up mark) for the 1/2-inch EMT stub-up. Click on the image to view a larger version of it. Select one: a. 12 7/8" b. 15 5/8" c. 17 7/8" d. 20 5/8"

a. 12 7/8"

Calculate the distance to the reference mark for a 20 3/4-inch stub-up length and match it to the conduit size. 1/2 " Answer 1 3/4 " Answer 2 1" Answer 3 1 1/4 " Answer 4

a. 15 3/4 b. 14 3/4 c. 12 3/4 d. 9 3/4

Match the bender mark, part, or type with the description of its use. Used to indicate when the desired angle has been made. Answer 1 Guides the bender as the bend is made. Answer 2 Available for 1/2", 3/4", and 1" RMC. Answer 3 When bending a stub 90, this mark is aligned with the pencil mark on the conduit. Answer 4 Indicates the center of a 45° bend.

a. angle mark b. handle c. hickey d. arrow e. rim notch

Match the bender mark, part, or type with the description of its use. Can be used to remove some bend from an over-bent 90. Answer 1 Coincides with the take-up of the bender. Answer 2 Can be sprung if used on rigid conduit or reinforcing bars. Answer 3 Should be checked for accuracy. Answer 4 Only used on rigid conduit. Answer 5

a. handle b. arrow c. hook d. angle marks e. hickey

picture of bender

a. hook b. handle c. shoe d. foot pedal

Match the bender mark, part, or type with the description of its use. Forms the conduit into the desired shape. Answer 1 Holds the conduit in place during the bending process. Answer 2 Designed to maximize the amount of pressure on the shoe. Answer 3 Indicates the back of a 90° bend. Answer 4 May be used on either EMT or Rigid. Answer 5

a. shoe b. hook c. foot pedal d. star e. hand bender

picture of a bender

a.angle markings b. star c. rim notch d. arrow

Hand benders are manufactured to bend EMT in sizes 1/2-inch to ? , and Rigid in sizes 1/2-inch to ? . Select one: a. 1" / 1" b. 1 1/4" / 1" c. 1 1/4" / 1 1/4" d. 1 1/2" / 1 1/4"

b. 1 1/4" / 1"

Choose the value that most closely equals the leg length needed for the 1/2-inch EMT in the photo. (Note that the first image represents a temporarily inserted conduit and a measurement taken from outside the connector; this measurement will require a deduction. The second image is a measurement being taken from inside the connector using a folding ruler and will not require a deduction.) Click on the image to view a larger version of it. Select one: a. 19 15/16" b. 20 5/8" c. 20 15/16" d. 22"

b. 20 5/8"

Applying the take-up short-cut method for stub-ups, what size is this conduit? Click on the image to view a larger version of it. Select one: a. 1/2" b. 3/4" c. Neither

b. 3/4"

On this 1/2" bender, in order to make a stub-up with a length of 10 inches, the reference mark will have to be made ? from the end of the conduit. Click on the image to view a larger version of it. Select one: a. 2.5" b. 5" c. 10" d. Not enough information to make the calculation.

b. 5"

What is the take-up? Click on the image to view a larger version of it. Select one: a. 4" b. 6" c. 8" d. 10"

b. 6"

Applying the take-up short-cut method for stub-ups, where would a pencil mark be placed on the 1-inch EMT in the photo to indicate where the take-up mark would be made for a stub-up length of 12 3/4 inches? Click on the image to view a larger version of it. Select one: a. 7 1/2" b. 8" c. 8 1/2" d. 9"

b. 8"

When fabricating a 90°-bend, the distance to the bending mark is equal to? Select one: a. The height of the desired stub-up b. The stub-up minus the take-up c. The take-up minus the stub-up d. The leg length plus the stub length

b. The stub-up minus the take-up

What is the stub-up length? Click on the image to view a larger version of it. Select one: a. 4" b. 6" c. 10" d. 12"

c. 10"

If you were measuring up from a box or fitting, what would be the value of stub-up required for the 3/4-inch EMT? Click on the image to view a larger version of it. Select one: a. 10 1/2 " b. 11 1/2 " c. 11 3/8" d. 11 3/4 "

c. 11 3/8"

A measurement is being taken to a box or fitting on the right. Calculate the distance to the take-up mark using the standard value given in the book for a 3/4-inch EMT bender. Click on the image to view a larger version of it. Select one: a. 12 1/8" b. 13 3/8" c. 17 3/8" d. 23 3/8"

c. 17 3/8"

Choose the value that most closely equals the stub-up length needed for the 1/2-inch EMT in the photo. Keep in mind that if the measurement is being taken to the side of the box, instead of the inside of the connector, it will be necessary to subtract a slight amount (1/16 to1/8 inch) to compensate for the ridge at the bottom of the connector. A temporarily inserted conduit has been installed for a measurement. Click on the image to view a larger version of it. Select one: a. 17 3/8" b. 17 5/8" c. 17 7/8" d. 8"

c. 17 7/8"

What is the size and type of conduit? Click on the image to view a larger version of it. Select one: a. 1/2" EMT b. 1/2" Rigid c. 3/4" EMT d. 3/4" Rigid

c. 3/4" EMT

If the bender used has a gain of 2 1/2 inches, what would be the total length of conduit required? Given: Stub-up = 17 7/8"; Leg = 20 5/8" Click on the image to view a larger version of it. Select one: a. 12" b. 24" c. 36" d. 48"

c. 36"

Using the standard value for take-up for a 3/4-inch EMT bender, how far will the take-up mark be from the end of the conduit? Click on the image to view a larger version of it. Select one: a. 4 1/2" b. 5 1/4" c. 5 3/8" d. 5 3/4"

c. 5 3/8"

A 1-inch EMT is being measured in order to make a stub-up. Calculate the distance to the bending mark that will be aligned with the arrow benchmark on the bender. Click on the image to view a larger version of it. Select one: a. 4" b. 8" c. 9" d. 12"

c. 9"

The tendency of a bend in a conduit to open slightly after it is bent is known as ? Select one: a. recoil b. setback c. springback d. none of the above

c. springback

A measurement is being taken to a box or fitting on the left. What is the distance to the take-up mark, using the standard value given in the book for a 1/2-inch EMT bender? Click on the image to view a larger version of it. Select one: a. 7" b. 7 1/2" c. 8" d. 8 1/2"

d. 8 1/2"

Which way should the bender face when bending a stub-up? Select one: a. Away from the end where the measurement was made b. The direction does not matter c. Toward the center of the conduit run d. Toward the end where the measurement was made

d. Toward the end where the measurement was made

In order to use an EMT hand bender to bend rigid conduit, what factors should be considered? Select one: a. The bender should be designed for use with both EMT and rigid conduit. b. The hook of the bender may be sprung by using it to bend rigid. c. The next larger sized bender should be used; for example, using a 3/4 " EMT bender for 1/2" rigid. d. a. and b. e. a., b., and c.

e. a., b., and c.

Which of the following identifies problems that might occur if inadequate foot pressure is used when making a bend with a hand bender? Select one: a. Distorted curve in the bend. b. The completed stub length may be longer than the desired stub length. c. The conduit may be kinked. d. a. and c. e. a., b., and c.

e. a., b., and c.

A "plumb 30" or a "plumb 45" bender will reliably produce an approximate 30°- or 45°-bend when the conduit is horizontal and the handle is pulled up so that the handle is vertical or plumb. Select one: True False

true