Welding Part B

Question 1

Which gas is produced using the air liquefaction process?

Answer 1

Oxygen

Question 2

What should be done before the cylinder valve protective caps are removed?

Answer 2

Cylinders should be secured.

Question 3

What do you do to protect the regulator gauges from being damaged?

Answer 3

Release the adjusting screw before you open the cylinder valve.

Question 4

When a piece of metal is cut, it creates a cut gap called what?

Answer 4

Kerf

Question 5

On a combination cutting torch, the oxygen valve on the torch handle must be?

Answer 5

Fully Open

Question 6

When the cut is rough and slag accumulates on the bottom edge, what is likely the cause?

Answer 6

Using a dirty tip.

Question 7

When piercing holes in a plate what should you do?

Answer 7

Raise the tip when the cutting lever is depressed.

Question 8

What is the likely problem if the kerf edges are melting back together behind the cut?

Answer 8

The tip is too large for material thickness.

Question 9

How can you determine a good quality cut?

Answer 9

Inspecting the kerf lines.

Question 10

Kerf draglines on a properly performed shape cut should be?

Answer 10

Perpendicular to the plate surface.

Question 11

What would be the most likely cause if you notice the preheat flames changing from neutral to carbonizing during the cutting process?

Answer 11

Oxygen cylinder is nearly empty.