CWB Level 2 Mod 9 Introduction to
Welding Metallurgy of Steel
Questions and Answers Already
Passed
One feature off hydrogen cracking is that it only occurs when the weld and heat affected zone are
at high temperatures? ✔✔False
Exercise Question - Sections 4-8
True or False
Welding over a gap in the backing bar of a complete penetration groove weld may result in a
transverse crack in the weld metal? ✔✔True
Exercise Question - Sections 9-12
In the heat affected zone of a weld in carbon steel, fast cooling rates will form a hard
________________________________? ✔✔Martensitic structure
Exercise Question - Sections 9-12
Which of the following types of steel is the least susceptible to hydrogen cracking in normal
circumstances?
a) high strength, high hardness steels
b) low strength, low hardness steels
c) all steels have the same susceptibility to hydrogen cracking ✔✔b) low strength, low hardness steels
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