RWST016 PREPARATION TEST 2026
QUESTIONS AND CORRECT ANSWERS
GRADED A+
● Which of the following welds is not considered applicable for an edge
joint?
a. V-groove
b. plug
c. edge-flange
d. U-groove
e. J-groove. Answer: b. plug
● Which of the following discontinuities is associated with shrinkage
stresses in the through-thickness direction of thick plate?
a. crater cracks
b. lamellar tears
c. toe cracks
d. root cracks
e. none of the above. Answer: b. lamellar tears
,● Which of the following is considered to be an acceptable way to
provide backing for a V-groove weld in a butt joint?
a. copper backing bar
b. ceramic backing
c. flux backing
d. backing weld
e. all of the above. Answer: e. all of the above
● An MT indication is noted at the toe of a fillet weld which exhibits an
excessively convex profile. What interpretation should be made?
a. Ignore, since it is a nonrelevant indication
b. Reject the weld
c. Grind to remove the excess convexity and retest
d. Accept the weld
e. none of the above. Answer: c. Grind to remove the excess convexity
and retest
● Which discontinuity occurs in the heat affected zone and can result
from excess moisture in the weld zone?
a. longitudinal crack
,b. crater crack
c. underbead crack
d. porosity
e. transverse crack. Answer: c. underbead crack
● The design strength of a fillet weld is always based on the throat
dimension because:
a. it has a columnar microstructure, which is more prone to cracking
b. it is the shortest failure path through the weld
c. it is the location of most defects
d. the design calculations cannot be checked
e. it is a theory of failure that cannot be supported by actual labratory
testing. Answer: b. it is the shortest failure path through the weld
● The "A" dimension is referred to as: (Figure 15)
a. the throat
b. the size
c. the leg
d. a and b above
e. b and c above. Answer: b. the size
, ● What is the approximate diameter of an electrode which measures 1.2
mm?
a. 0.472 in
b. 4.72 in
c. 0.39 ft
d. 0.039 ft
e. none of the above. Answer: e. none of the above
● Ultrasonic inspection is to be performed:
(figure 19)
a. on the backing weld only
b. on the entire length of weld
c. on 10% of the weld length
d. from the arrow side only
e. none of the above. Answer: b. on the entire length of weld
● Double-welded-groove joints always require:
a. backgouging
b. special welding processes
QUESTIONS AND CORRECT ANSWERS
GRADED A+
● Which of the following welds is not considered applicable for an edge
joint?
a. V-groove
b. plug
c. edge-flange
d. U-groove
e. J-groove. Answer: b. plug
● Which of the following discontinuities is associated with shrinkage
stresses in the through-thickness direction of thick plate?
a. crater cracks
b. lamellar tears
c. toe cracks
d. root cracks
e. none of the above. Answer: b. lamellar tears
,● Which of the following is considered to be an acceptable way to
provide backing for a V-groove weld in a butt joint?
a. copper backing bar
b. ceramic backing
c. flux backing
d. backing weld
e. all of the above. Answer: e. all of the above
● An MT indication is noted at the toe of a fillet weld which exhibits an
excessively convex profile. What interpretation should be made?
a. Ignore, since it is a nonrelevant indication
b. Reject the weld
c. Grind to remove the excess convexity and retest
d. Accept the weld
e. none of the above. Answer: c. Grind to remove the excess convexity
and retest
● Which discontinuity occurs in the heat affected zone and can result
from excess moisture in the weld zone?
a. longitudinal crack
,b. crater crack
c. underbead crack
d. porosity
e. transverse crack. Answer: c. underbead crack
● The design strength of a fillet weld is always based on the throat
dimension because:
a. it has a columnar microstructure, which is more prone to cracking
b. it is the shortest failure path through the weld
c. it is the location of most defects
d. the design calculations cannot be checked
e. it is a theory of failure that cannot be supported by actual labratory
testing. Answer: b. it is the shortest failure path through the weld
● The "A" dimension is referred to as: (Figure 15)
a. the throat
b. the size
c. the leg
d. a and b above
e. b and c above. Answer: b. the size
, ● What is the approximate diameter of an electrode which measures 1.2
mm?
a. 0.472 in
b. 4.72 in
c. 0.39 ft
d. 0.039 ft
e. none of the above. Answer: e. none of the above
● Ultrasonic inspection is to be performed:
(figure 19)
a. on the backing weld only
b. on the entire length of weld
c. on 10% of the weld length
d. from the arrow side only
e. none of the above. Answer: b. on the entire length of weld
● Double-welded-groove joints always require:
a. backgouging
b. special welding processes
