(9) WELD AND BASE METAL DISCONTINUITIES Flashcards
Q9-1
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
Q9-1
A discontinuity is:
d. rejectable if it exceeds code limits
Q9-2
Whether a particular weld discontinuity is critical 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
Q9-2
Whether a particular weld discontinuity is critical can be judged on the basis of:
D. all of the above
a. whether it is surface or subsurface.
b. whether it is linear or nonlinear.
c. whether it has a sharp end condition.
Q9-3
What discontinuity is generally considered to be the most severe?
a. porosity
b. incomplete fusion
c. slag inclusion
d. crack
e. arc strike
Q9-3
What discontinuity is generally considered to be the most severe?
d. crack
Q9-4
Which of the following discontinuities is less likely to be found visually?
a. toe crack
b. undercut
c. lamellar tear
d. overlap
e. none of the above
Q9-4
Which of the following discontinuities is less likely to be found visually?
c. lamellar tear
Q9-5
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
Q9-5
Underbead cracks can result from which of the following welding practices?
D. all of the above
a. use of wet electrodes
b. welding on contaminated steels
c. welding over paint
Q9-6
The weld discontinuity that results from improper termination of the welding arc is referred to as:
a. undercut
b. overlap
c. crater crack
d. incomplete fusion
e. all of the above
Q9-6
The weld discontinuity that results from improper termination of the welding arc is referred to as:
c. crater crack
Q9-7
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
Q9-7
Of the following processes, which is unlikely to have slag inclusions in a completed weld?
b. PAW
Q9-8
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
Q9-8
The discontinuity that results from the entrapment of gas within the weld cross section is referred to as:
d. porosity
Q9-9
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
Q9-9
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?
c. overlap
Q9-10
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
Q9-10
What weld metal discontinuity results when the welder fails to completely fill the weld groove?
a. underfill
Q9-11
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
Q9-11
Excessive weld metal buildup on a groove weld is referred to as:
b. excess weld reinforcement
Q9-12
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
Q9-12
The weld discontinuity that results from the initiation of the welding arc outside the weld joint is referred to as:
e. arc strike
Q9-13
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
Q9-13
What weld discontinuity shows up as a light region on a radiograph?
b. tungsten inclusion
Q9-14
Which of the following is a base metal discontinuity that is associated with the stresses induced from welding?
a. lamination
b. lamellar tear
c. seam
d. pipe shrinkage
e. none of the above
Q9-14
Which of the following is a base metal discontinuity that is associated with the stresses induced
b. lamellar tear
Q9-15
What discontinuity is shown by #12b?
a. longitudinal crack
b. transverse crack
c. underbead crack
d. toe crack
e. root crack
Q9-15
What discontinuity is shown by #12b?
b. transverse crack
Q9-16
What step-like discontinuity is shown by #11?
a. lamination
b. porosity
c. lamellar tear
d. seam
e. lap
Q9-16
What step-like discontinuity is shown by #11?
c. lamellar tear
Q9-17
What discontinuity is shown by #12g?
a. toe crack
b. incomplete fusion
c. root crack
d. lamellar tear
e. underbead crack
Q9-17
What discontinuity is shown by #12g?
e. underbead crack
Q9-18
What discontinuity is shown by #5?
a. undercut
b. underfill
c. overlap
d. incomplete fusion
e. toe crack
Q9-18
What discontinuity is shown by #5?
a. undercut
Q9-19
What discontinuity is shown by #10?
a. lamination
b. seam
c. delamination
d. base metal crack
e. incomplete fusion
Q9-19
What discontinuity is shown by #10?
b. seam
