Chapter 9 practice test.

Question 1

A discontinuity is:

a. always a defect
b. always a reject
c. always acceptable
d. rejectable if it exceeds code limits
e. none of the above

Answer 1

d. rejectable if it exceeds code limits

Question 2

The criticality of a particular weld discontinuity can be judged on the basis of:

a. whether it is surface or subsurface.
b. whether it is linear or nonlinear.
c. whether it has a sharp end condition.
d. all of the above
e. none of the above

Answer 2

d. all of the above

Question 3

What discontinuity is generally considered to be the most severe?

a. porosity
b. incomplete fusion
c. slag inclusion
d. crack
e. arc strike

Answer 3

d. crack

Question 4

Which of the following discontinuities is less likely to be seen visually?

a. toe crack
b. undercut
c. lamellar tear
d. overlap
e. none of the above

Answer 4

c. lamellar tear

Question 5

Underbead cracks can result from which of the following welding practices?

a. use of wet electrodes
b. welding on contaminated steels
c. welding over paint
d. all of the above
e. none of the above

Answer 5

d. all of the above

Question 6

The weld discontinuity that results from improper termination of the weldmg arc is referred to
as:
a. undercut
b. overlap
c. crater crack
d. incomplete fusion
e. all of the above

Answer 6

c. crater crack

Question 7

Of the following processes which is unlikely to have slag inclusions in a completed weld?

a. SMAW
b. PAW
c. FCAW
d. SAW
e. none of the above

Answer 7

b. PAW

Question 8

The discontinuity that results from the entrapment of gas within the weld cross section is
referred to as:
a. crack
b. slag inclusion
c. incomplete fusion
d. porosity
e. none of the above

Answer 8

d. porosity

Question 9

What weld discontinuity results when the welder travels too slowly, causing excess weld metal to flow out of the joint and lay on the base metal surface without fusing?

a. undercut
b. underfill
c. overlap
d. incomplete fusion
e. none of the above

Answer 9

c. overlap

Question 10

What weld metal discontinuity results when the welder fails to completely fill the weld
groove?
a. underfill
b. undercut
c. overlap
d. incomplete fusion
e. none of the above

Answer 10

a. underfill

Question 11

Excessive weld metal buildup on a groove weld is referred to as:

a. excess convexity
b. excess weld reinforcement
c. overfill
d. all of the above
e. none of the above

Answer 11

b. excess weld reinforcement

Question 12

The weld discontinuity that results from the initiation of the welding arc outside the weld joint
is referred to as:
a. incomplete fusion
b. undercut
c. overlap
d. scratch start
e. arc strike

Answer 12

e. arc strike

Question 13

What weld discontinuity shows up as a light region on a radiograph?

a. porosity
b. tungsten inclusion
c. slag inclusion
d. a and b above
e. b and c above

Answer 13

b. tungsten inclusion

Question 14

Which of the following is not a base metal discontinuity, resulting from improper steelmaking
practices?
a. lamination
b. lamellar tear
c. seam
d. pipe shrinkage
e. none of the above

Answer 14

b. lamellar tear