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Engineering Materials - Interview Questions and Answers

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101. The number of electrons in 1 cm3 of metal would be of the order of
A. 1010
B. TO16
C. 1022
D. 1040
E. 1052
Explanation:
102. Wrought iron is
A. hard
B. high in strength
C. highly resistant to corrosion
D. heat treated to change its properties
E. least resistant to corrosion.
Explanation:
103. Steel contains
A. 80% or more iron
B. 50% or more iron
C. alloying elements like chromium, tungsten nickel and copper
D. elements like phosphorus, sulfur and silicon in varying quantities
E. high quantities of sulfur.
Explanation:
104. Cast iron is characterised by minimum of following %age of carbon
A. 0.2%
B. 0.8%
C. 1.3%
D. 2%
E. 6.3%.
Explanation:
105. An important property of malleable cast iron in comparison to grey cast iron is the high
A. compressive strength
B. ductility
C. carbon content
D. hardness
E. surface finish.
Explanation:
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