1000+ Engineering Materials Objective Questions and Answers Pdf - 2

Question: 6

The common household glass is

(A) lead glass

(B) high silica glass

(C) borosilicate glass

(D) soda lime glass

Ans: D

soda lime glass

Question: 7

Which of the following is donor impurity for semi-conductors?

(A) indium

(B) boron

(C) aluminium

(D) antimony

Ans: A

indium

Question: 8

The process of reheating the hardened steel to some temperature below the critical range, followed by any rate of cooling is known as

(A) annealing

(B) austempering

(C) normalising

(D) tempering

Ans: D

tempering

Question: 9

Monel metal consists of

(A) nickel and copper

(B) zinc, nickel and copper

(C) zinc, copper and lead

(D) nickel, lead and tin

Ans: A

nickel and copper

Question: 10

The dominant alloys in shock resisting tools are

(A) nickel

(B) cobalt

(C) chromium tungsten

(D) carbon

Ans: C

chromium tungsten

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