CWB Level 3 Exam (Latest 2026/2027 Update) Questions with 100% Verified Answers | Canadian Welding Bureau Inspector Certification| Graded A+

CWB Level 3 Exam (Latest 2026/2027
Update) Questions with 100% Verified
Answers | Canadian Welding Bureau
Inspector Certification| Graded A+
Question:
Which of the following elements is often present in submerged arc fluxes
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to improve arc stability?
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(a) copper
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(b) potassium
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(c) nickel
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(d) tungsten?
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Answer:
(b)




Question:

Thoria is added to tunsten electrodes for what purpose??
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Answer:

To increase thermionic emission by lowering the work function.
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,Question:
True or False?i,- i,-




All pure metals have the same crystal structure.?
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Answer:

False. Metals generally have one of three basic structures.
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Question:

Which crystal structure(s) is (are) composed of close-packed planes??
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Answer:
FCC and HCP i,- i,-




Question:
The real strength of metals is lower than the theoretical value because:
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(a) real crystals always fracture along specific crystal planes.
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(b) grain boundary sliding occurs.
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(c) the presence of dislocations facilitates slip.?
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Answer:

(c)



Question:
Which of the following metals has the highest thermal conductivity?
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, (a) carbon steel
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(b) stainless steel
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(c) aluminum?
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Answer:

(c)




Question:

The Ellingham diagram
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(a) is a plot of thermal conductivity against temperature,
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(b) shows the free energy of oxide formation against temperature.
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(c) shows the rate of oxidation of metals against temperature.?
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Answer:

(b)




Question:
True or False? i,- i,-




A metal with a high negative free energy of oxide formation will generally
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require greater shielding from the atmosphere during welding.?
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Answer:

True