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Engineering Materials - Interview Questions and Answers

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116. An important property of high silicon (12 - 18%) cast iron is the high
A. tenacity
B. brittleness
C. plasticity
D. corrosion resistance
E. hardness.
Explanation:
117. The crystal of alpha iron is
A. body centred cubic
B. face centred cubic
C. hexagonal close packed
D. cubic structure
E. orthorhombic crystal.
Explanation:
118. Paramagnetic alpha iron changes to gamma iron at
A. 770�C
B. 910�C
C. 1440�C
D. 1539�C
E. none of the above.
Explanation:
119. White cast iron contains carbon in the form of
A. free carbon
B. graphite
C. cementite
D. white carbon
E. ferrite.
Explanation:
120. In malleable iron, carbon is present in the form of
A. cementite
B. free carbon
C. flakes
D. spheroids
E. nodular aggregates of graphite.
Explanation:
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