Distortion and the HAZ

What causes distortion during welding?

• The cooling of metal
  

• The uneven expansion and contraction of metal

• The use of incorrect welding techniques

• The type of metal used

Which type of distortion occurs along the length of the weld?

• Transverse distortion
  

• Angular distortion

• Longitudinal shrinkage

• Heat affected distortion

What is the effect of placing a metal bar in a vise while heating it?

• It increases the length of the bar
  

• It allows the bar to expand freely

• It prevents the bar from expanding in length

• It has no effect on the bar

Which welding technique can help minimize distortion?

• Continuous welding
  

• Back-step welding

• Single-pass welding

• Random welding

What happens to the weld metal volume when using larger welds?

• It decreases distortion
  

• It increases distortion

• It has no impact on distortion

• It makes the weld stronger

What is a common method to counteract distortion in welding?

• Use of low-temperature welding
  

• Pre-setting material before welding

• Ignoring heat effects

• Continuous bead welding

Which of the following is NOT a rule for controlling distortion?

• Reduce weld metal volume
  

• Use distortion to your advantage

• Avoid using fixtures

• Correct sequence and fixtures

What is the main benefit of using intermittent welding?

• It increases the strength of the weld
  

• It eliminates the need for fixtures

• It requires less time

• It reduces weld metal volume

The heat affected zone is described as:

• The area around the weld that remains unaffected
  

• The area that cools rapidly and contracts

• The area that expands without restraint

• The area that is never affected by heat

What is a strong-back used for in welding?

• To increase the volume of the weld
  

• To make the weld more flexible

• To hold the material in place during welding

• To create additional heat during the process