Certified Welder Heat Input and Distortion Control 2

Question 1

Which welding technique deposits short weld segments in the opposite direction of the overall welding progression?

Accepted Answer

Backstep welding

Answer

Backstep welding deposits each short segment in a direction opposite to the overall joint progression, distributing heat more evenly and reducing shrinkage distortion.

Question 2

Pre-setting (presetting) as a distortion control technique involves:

Accepted Answer

Positioning parts at an offset angle to compensate for expected distortion

Answer

Pre-setting positions the workpieces at an angle opposite to the expected distortion so that after welding and cooling, the parts return to the desired final position.

Question 3

How does peening a weld bead between passes help control distortion?

Accepted Answer

It stretches the weld metal to counteract contraction stresses

Answer

Peening mechanically stretches the weld metal, opposing the contraction that drives distortion, though it should never be applied to the root or final cap pass.

Question 4

Which distortion control method physically prevents movement by holding parts rigidly during welding?

Accepted Answer

Restraint and fixturing

Answer

Restraint and fixturing use clamps and jigs to hold parts in place during welding, physically resisting the shrinkage forces that would otherwise cause distortion.

Question 5

Alternating weld passes on both sides of a joint to equalize shrinkage forces is known as:

Accepted Answer

Balanced welding

Answer

Balanced welding alternates passes symmetrically on both sides of the joint so that shrinkage forces cancel each other out, minimizing angular and longitudinal distortion.

Certified Welder Practice Test

Certified Welder Practice Test

Certified Welder Heat Input and Distortion Control 2