Chapter 21

Question 1

What type of welding is the joining of metal pieces by melting them together?

Molten welding

Tack welding

Fusion welding

Answer 1

Fusion welding

Question 2

True or False

When using a filler rod, once the puddle is formed, dip the end of the filler rod into the puddle and begin moving the torch in a series of vertical ovals, while at the same time moving the rod up and down, in and out of the puddle.

Answer 2

True

Question 3

Select all that apply to tack welding.

prevent expansion or contraction of the weld joint during continuous welding

small, spaced welds along the weld joint made before running the bead

neat ripples along the weld while in a semiliquid state

the torch tip is manipulated in the opposite direction

Answer 3

prevent expansion or contraction of the weld joint during continuous welding

small, spaced welds along the weld joint made before running the bead

Question 4

Which problem is an explosion occurring at the tip accompanied by gases burning back into the hoses and regulators?

Burnback

Backfire

Flashback

Answer 4

Flashback

Question 5

Which welding technique does the torch tip precedes the filler rod in the direction of the weld?

Forehand welding

Backhand welding

Answer 5

Backhand welding

Question 5

Which problem is a momentary burning back of the flame into the tip ending with a loud pop (explosion
at the tip).

Backfire

Flashback

Burnback

Answer 5

Backfire