AWS CWI Questions and Answers (Module 10)

The free pdf file of Nineteen (19) Module 9 Q&A model of 2000 version:

Module 9 AWS CWI QUESTIONS ANSWERS (pdf) DOWNLOAD

The Below Twenty (20) Questions are model of 2018 version

Module 10: Welding Discontinuities

Q10-1 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

Q10-2 Of the following, which is commonly caused by the presence of hydrogen in a crack susceptable microstructure subjected to applied stress?
a. lamellar tearing.
b. delamination
c. porosity.
d. delayed cracking.
e. none of the above

Q10-3 Porosity, occuring in the form of large cylindrical pores is called:
a. clustered porosity
b. linear scattered porosity
c. uniformly scattered porosity
d. elongated porosity
e. none of the above

Q10-4 Which of the following discontinuities is least likely to be seen visually?
a. toe crack
b. undercut
c. lamellar tear
d. overlap
e. none of the above

Q10-5 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

Q10-6 The weld discontinuity which 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

Q10-7 All but which of the following processes may result m the presence of slag inclusions in the completed weld?
a. SMAW
b. PAW
c. FCAW
d. SAW
e. none of the above

Q10-8 That discontinuity which 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

Q10-9 What base metal discontinuity, located at the weld toe, is caused by the welder traveling too rapidly?
a. underfill
b. undercut
c. incomplete fusion
d. overlap
e. none of the above

Q10-10 What weld discontinuity results when the welder travels too slowly causing excess weld metal to pour 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

Q10-11 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

Q10-12 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

Q10-13 The weld discontinuity which 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

Q10-14 Of the following, which weld discontinuity shows up as a light region on a radiograph?
a. porosity
b. incomplete joint penetration
c. a and b above
d. tungsten inclusion
e. none of the above

Q10-15 What base metal discontinuity results from improper steelmaking practice and is associated with the rolled surface?
a. lamination
b. delamination
c. seam
d. crack
e. none of the above

Questions Q10-I6 through Q10-20 refer to the figure on the facing page:

Weld discontinuities.png

Q10-16 What discontinuity is shown by #12b?
a. longitudinal crack
b. transverse crack
c. face crack
d. toe crack
e. root crack

Q10-17 What discontinuity is shown by #11?
a. lamination
b. base metal crack
c. lamellar tear
d. seam
e. lap

Q10-18 What discontinuity is shown by #12g?
a. toe crack
b. incomplete fusion
c. root crack
d. lamellar tear
e. underbead crack

Q10-I9 What discontinuity is shown by #5?
a. undercut
b. underfill
c. overlap
d. incomplete fusion
e. toe crack

Q10-20 What discontinuity is shown by #10?
a. lamination
b. seam
c. delamination
d. base metal crack
e. incomplete fusion

Key: dddcdcbdccabedabceab

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