1000+ Heat & Mass Transfer MCQ Questions and Answers Pdf - 2

Question: 6

Which of the following material has thermal conductivity closest to silver?

(A) aluminium

(B) brass

(C) copper

(D) steel

Ans; C

copper

Question: 7

Which rays have the least wavelength?

(A) radio

(B) X-rays

(C) ultraviolet rays

(D) infrared rays

Ans: B

X-rays

Question: 8

A vapour containing liquid particles to the extent of 50% by the volume is known as

(A) saturated vapour

(B) wet vapour

(C) super saturated liquid

(D) saturated liquid

Ans: B

wet vapour

Question: 9

The machine having highest insulating resistance is

(A) brick

(B) cork

(C) concrete

(D) plywood

Ans: B

cork

Question: 10

Molecular transmission of heat is smallest in case of

(A) solids

(B) gases

(C) liquids

(D) liquids with impurities

Ans: B

gases

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