1000+ Heat Transfer Questions and Answers Pdf - 2

Question: 6

An equipment which converts the latent or sensible heat of one fluid into the latent heat of vaporisation of another, is called a

(A) regenerator

(B) recuperator

(C) heat exchanger

(D) boiler

Question: 7

Heat flux increases with temperature drop beyond the Leidenfrost point in the plot of heat flux vs temperature drop for a boiling liquid, because

(A) sub cooled boiling occurs

(B) radiation becomes important

(C) conduction becomes importart

(D) convection becomes important

Question: 8

A gray body is a substance having absorptivity

(A) equal to one

(B) less than one and dependent on temperature

(C) less than one and independent of temperature

(D) greater than one

Question: 9

The purpose of floating head in a heat exchanger is to

(A) facilitate its lengthening if needed

(B) decrease the pressure drop

(C) provide support for tubes

(D) avoid buckling of tubes

Question: 10

Heat waves

(A) cannot pass through vacuum

(B) travel in straight line

(C) can be reflected by a mirror

(D) both b and c