Chapter 18 Welding Theory Questions

Question 1

An increase in sparks on clean metal means a decrease in weld temperature

Answer 1

false

Question 2

() is the easiest metal to gas weld.

Answer 2

mild steel

Question 3

to prevent burnthrough, a torch should be raised or tilted, keeping the outerflame envelope over the molten weld pool until it solidifies

Answer 3

true

Question 4

The flat () joint can be made with or without the addition of filler metal. This joint is one of the easiest welded joints to make.

Answer 4

the outside corner

Question 5

Gas welding cannot be used on thick sections of metal

Answer 5

false

Question 6

It is permissible to lower the size of the torch flame when the correct tip size is unavailable

Answer 6

false

Question 7

It is considered good practice in the field to stop a weld at the corner of a joint.

Answer 7

false

Question 8

One of the characteristics of a(n) () join is that one side of the metal will melt faster

Answer 8

tee joint

Question 9

Welding heat distortion and weld metal shrinkage are common problems caused by using an oxyacetylene torch to make large flat weldments.

Answer 9

true

Question 10

Heat is not distributed uniformly in the () joint

Answer 10

lap

Question 11

During the welding process, the more frequently you add filler metal, the larger the weld would be.

Answer 11

true

Question 12

() the torch off is a process in which the torch is quickly moved away from the weld for a fraction of a second and then brought back to the welding position

Answer 12

Flashing

Question 13

A(n) () joint is made by aligning the edges of two pieces of flat metal together so they are next to each other

Answer 13

butt joint

Question 14

a problem that is unique to the () joint is that a large percentage of the welding heat is reflected back onto the torch.

Answer 14

tee joint

Question 15

The ideal angle for welding torch is () degrees

Answer 15

45

Question 16

() is the depth into the base metal that the weld fusion or melting extends from the surface, excluding any reinforcement.

Answer 16

penetration

Question 17

Changing the torch angle changes the percentage of heat that is transferred into the metal

Answer 17

true

Question 18

An advantage of gas welding is that by changing the size of the tip you can change the welding

Answer 18

speed

Question 19

The flat tee joint is more difficult to make than te butt and lap joints

Answer 19

true

Question 20

The () joint is made when one piece of metal is laid over the edge of another

Answer 20

lap