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Engineering Materials - Interview Questions and Answers

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131. Surveying tapes are made of a material having low coefficient of expansion and enough strength. The alloy used is
A. silver metal
B. duralumin
C. Hastelloy
D. monel metal
E. invar.
Explanation:
132. An engineer's hammer is made of
A. cast iron
B. forged steel
C. mild steel
D. high carbon steel
E. H.S.S.
Explanation:
133. Cyaniding is the process of
A. dipping steel in cyanide bath
B. reacting steel surface with cyanide salts
C. adding carbon and nitrogen by heat treatment of steel to increase its surface hardness
D. obtaining cyanide salts
E. making corrosion resistant steel.
Explanation:
134. Annealing of white cast iron results in production of
A. malleable iron
B. nodular iron
C. spheroidal iron
D. grey iron
E. none of the above.
Explanation:
135. 'Killed steels' are those steels
A. which are destroyed by burning^
B. which after their destruction are recycled to produce fresh steel
C. which are deoxidised in the ladle with silicon and aluminium
D. in which carbon is completely burnt
E. which have poor properties due to im�proper manufacturing.
Explanation:
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