Chapter 31

Question 1

What type of weld reduces distortion by welding back to the beginning point of the previous welded section?

Intermittent weld

Skip weld

Tack weld

Back-step

Answer 1

Back-step

Question 2

Which best describes the skip weld method?

A series of tack welds used when the strength of a full-length weld is not needed.

A series of short welds at intervals is followed by a second bead which fills in the gaps.

A series of welds along the joint done in a “skipping” movement.

Answer 2

A series of short welds at intervals is followed by a second bead which fills in the gaps.

Question 3

What two factors contribute to distortion during arc welding?

Quality of electrodes

Direct Current

Rapid heating

Slow cooling

Answer 3

Rapid heating

Slow cooling

Question 4

What is the benefit of peening the base metal?

expands the metal and relives the pressure that causes distortion

distributes the heat throughout the metal more evenly

helps cool down the metal faster to prevent warping

Answer 4

expands the metal and relives the pressure that causes distortion

Question 5

As weld metal volume increases, what happens to the force/load and distortion?

nothing

increases

decreases

Answer 5

increases

Question 6

When is an intermittent weld a better choice over a continuous bead?

When additional strength isn’t required and corrosion is not an issue

When you only have 6018 electrodes

When additional strength is needed for a weld

Answer 6

When additional strength isn’t required and corrosion is not an issue

Question 7

What weld reduces the total weld metal volume and therefore the amount of distortion?

Backstep weld

Stitch weld

Tack weld

Answer 7

Stitch weld

Question 8

True or False

Backstep welding minimizes distortion by making shorter welds and working right to left in the opposite direction to the direction of the weld and also will not be affected as much by the heat from the compound welds.

Answer 8

True

Question 9

What are strongbacks used for?

They provide additional support and strength to the weld.

They hold the material in place during welding and provide restraint against the contracting weld.

They help guide the welder and determine weld placement on the work piece.

Answer 9

They hold the material in place during welding and provide restraint against the contracting weld.

Question 10

What are the main types of distortion?

Transverse distortion

Vertical distortion

Longitudinal distortion

Horizontal distortion

Angular distortion

Answer 10

Transverse distortion
Longitudinal distortion
Angular distortion