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Engineering Materials - Interview Questions and Answers

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136. By severely deforming a metal in a particular direction it becomes
A. ductile
B. malleable
C. homogeneous
D. isotropic
E. anisotropic.
Explanation:
137. Pick up the wrong statement
A. aluminum in steel results in excessive grain growth
B. manganese in steel induces hardness
C. nickel and chromium in steel help in raising the elastic limit and improve the resilience and ductility
D. tungsten in steels improves magnetic properties and harden ability
E. sulphur, phosphorous and lead improve machining properties of steel.
Explanation:
138. Inconel is an alloy of
A. nickel, chromium and iron
B. nickel, copper
C. nickel, chromium
D. nickel, zinc
E. nickel, lead.
Explanation:
139. Basic constituents of Monel metal are
A. nickel, copper
B. nickel, molybdenum
C. zinc, tin, lead
D. nickel, lead and tin
E. none of the above.
Explanation:
140. Which of the following represents the allotropic forms of iron
A. alpha iron, beta iron and gamma iron
B. alpha iron and beta iron
C. body centered cubic a-iron and face centered cubic a-iron
D. alpha iron, gamma from and delta iron
E. none of the above.
Explanation:
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