CWB WELDING INSPECTOR LEVEL III
EXAM 2025/2026 WITH QUESTIONS AND
100% CORECT ANSWERS |
GUARANTEED PASS | ALREADY
GRADED A+ | CWB WELDING
INSPECTOR LEVEL III LATEST EXAM
Multiplication and subsequent congestion of moving dislocations causes:
(a) elastic extension.
(b) work or strain hardening.
(c) a drop in the yield stress. - ANSWER-(b)
Which of the following elements are most likely to form interstitial solid solutions?
(a) copper
(b) nickel
(c) carbon - ANSWER-(c)
If FCC iron has a denser structure than BCC iron, why does it have a higher
solubility for carbon? - ANSWER-The preferred site for carbon in BCC iron is
smaller than that in FCC iron.
, If two metals have complete mutual solid solubility how many phases are formed
in the solid- one or two? - ANSWER-One
How many phases are there in a eutectic- one or two? - ANSWER-Two
Without referring to the text, draw the phase diagram for a eutectic system with
limited mutual solid solubility of the two components. - ANSWER-Refer to Figure
6.6(Module 20-2014, page 18)
Using the portion of the iron-carbon phase diagram in Figure 6.10(Module 20-
2014, page 21), use the lever rule to determine the precentage of ferrite and
eutectoid pearlite present in a slowly cooled 0.2% carbon steel. - ANSWER-About
25% pearlite and 75% ferrite. Here the tie line begins at 0.0%C (α ferrite) and ends
at 0.08%C (pearlite).
The fulcrum for the lever rule is at 0.2%C
% pearlite = (0.2%C - 0.0%C)/).8%C - 0.0%C) x 100%
% pearlite = (0.2/0.8) x 100%
% pearlite = 25%
Which of the following metals has the highest work hardening coefficient?
(a) 70/30 brass
(b) aluminum
(c) copper
(d) low carbon steel - ANSWER-(a)
True or False?
Recrystallization always involves the formation of a new phase. - ANSWER-False
EXAM 2025/2026 WITH QUESTIONS AND
100% CORECT ANSWERS |
GUARANTEED PASS | ALREADY
GRADED A+ | CWB WELDING
INSPECTOR LEVEL III LATEST EXAM
Multiplication and subsequent congestion of moving dislocations causes:
(a) elastic extension.
(b) work or strain hardening.
(c) a drop in the yield stress. - ANSWER-(b)
Which of the following elements are most likely to form interstitial solid solutions?
(a) copper
(b) nickel
(c) carbon - ANSWER-(c)
If FCC iron has a denser structure than BCC iron, why does it have a higher
solubility for carbon? - ANSWER-The preferred site for carbon in BCC iron is
smaller than that in FCC iron.
, If two metals have complete mutual solid solubility how many phases are formed
in the solid- one or two? - ANSWER-One
How many phases are there in a eutectic- one or two? - ANSWER-Two
Without referring to the text, draw the phase diagram for a eutectic system with
limited mutual solid solubility of the two components. - ANSWER-Refer to Figure
6.6(Module 20-2014, page 18)
Using the portion of the iron-carbon phase diagram in Figure 6.10(Module 20-
2014, page 21), use the lever rule to determine the precentage of ferrite and
eutectoid pearlite present in a slowly cooled 0.2% carbon steel. - ANSWER-About
25% pearlite and 75% ferrite. Here the tie line begins at 0.0%C (α ferrite) and ends
at 0.08%C (pearlite).
The fulcrum for the lever rule is at 0.2%C
% pearlite = (0.2%C - 0.0%C)/).8%C - 0.0%C) x 100%
% pearlite = (0.2/0.8) x 100%
% pearlite = 25%
Which of the following metals has the highest work hardening coefficient?
(a) 70/30 brass
(b) aluminum
(c) copper
(d) low carbon steel - ANSWER-(a)
True or False?
Recrystallization always involves the formation of a new phase. - ANSWER-False
