Raceway exam prep

• When bending a stub 90 degree bend 12’’ long using 3/4’’ EMT must deduct 5” from the measurement in order for the stub to be the proper length. TRUE OR FALSE

  False
• The most important factor to keep in mind in order to produce smooth 90 degree sweeps is?

  Foot pressure
• When a “Dog Leg” is ?

  a mistake when bending offsets which results in the two bends not lining up with eachother.
• When bending a 90 degree bend we must deduct a pre determined amount in order for the stub to be the proper length. The amount is known as gain. True or false?

  False. The amount is known as take up.
• you are sent on a jobsite that has a bender with no information on it. Do you? What #?

  1. call the shop for a new bender.
  2. find someone that has used it before.
  3. make some sample bends with scraps and familiarize yourself with it.

  
  

  3
• A ? Bend is a conduit bend formed with two equal degree bends in such a way so that the conduit changes elevation to avoid an obstruction.

  1. saddle
  2. offset
  3. back to back

  Offset
• Shrinkage per inch of rise when using 30° bends will ?? As the size of conduit increases.

  1. decrease
  2. increase
  3. stay consistent

  3
• What length is standard conduit produced in?

  1. 12 foot lengths
  2. 10 foot lengths
  3. 3 meter lengths

  10 foot lengths
• What trig function is used in to determine distance between bends multiplier?

  1. cosine
  2. Tangent
  3. sine

  3
• When bending the middle of a 3 point saddle where would you place the bending mark?

  1. star
  2. arrow
  3. rim notch

  3
• A type of bend that results in the conduit going over an obstruction that is blocking its path then returning to the original plane.

  Saddle bend
• When using a Chicago bender or electric bender for offset where do you place mark?

  1. centre of hook
  2. back edge of hook
  3. front edge of hook
  4. arrow

  3
• A type of bend that is made with two equal degree bends in such a way that the conduit changes elevation to avoid an obstruction.

  offset bend
• the amount which must be subtracted from the desired stub height prior to bending a 90° sweep

  Takeup of a bender
• The amount the conduit seems to increase when a 90° bend is made

  Gain of bender
• Conduit threads which come on the end of a full length of conduit from factory are tapered, but when threads are cut in the field they are parallel threads. True or false?

  FALSE
• a mistake in bending when two bends in a raceway do not line up

  DOG LEG
• Your target is to have an offset 4” high. What do you do? Back Is 4” front is 3 1/2”.

  
  

  decrease bend 1

  
• Your target is to bend the offset to 2” high

  increase bend 1

  
• What is A?

  1. LB
  2. LL
  3. LR

  3

  
• What is B?

  1. LR
  2. LB
  3. LL

  2