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Engineering Materials - Interview Questions and Answers

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81. Following elements have face-centred cubic structure
A. gamma iron (910� to 1400�C), Cu, Ag, Au, Al, Ni, Pb, Pt
B. Mg, Zn, Ti, Zr, Br, Cd
C. a iron (below 910�C and between 1400 to 1539�C), W
D. all of the above
E. none of the above.
Explanation:
82. Babbit metal is a
A. lead base alloy
B. tin base alloy
C. copper base alloy
D. all of the above
E. (a) and (c) above.
Explanation:
83. Neutral solution is one which has pH value
A. greater than 7
B. less than 7
C. equal to 7
D. pH value has nothing to do with neutral solution
E. none of the above.
Explanation:
84. Pearlite is a combination of
A. ferrite and cementite
B. cementite and gamma iron
C. ferrite and austenite
D. ferrite and iron graphite
E. pearlite and ferrite.
Explanation:
85. The transistor is made of
A. silver
B. gold
C. copper
D. germanium
E. german silver.
Explanation:
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