Exercise: Engineering Materials

Questions for: Engineering Materials

When a steel containing __________ 0.8% carbon is cooled slowly below the lower critical point, it consists of ferrite and pearlite.
A:
equal to
B:
less than
C:
more than
D:
Answer: B
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A steel containing 12 to 14% chromium and 0.12 to 0.35% carbon is called martensitic stainless steel.
A:
True
B:
False
C:
D:
Answer: A
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Normalising of steel is done to
A:
refine the grain structure
B:
remove strains caused by cold working
C:
remove dislocations caused in the internal structuure due to hot working
D:
all of the above
Answer: D
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Duralumin has better strength than Y-alloy at high temperature.
A:
True
B:
False
C:
D:
Answer: B
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The steel produced by cementation process is known as __________ steel.
A:
blister
B:
crucible
C:
D:
Answer: A
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