Heat And Mass Transfer MCQ Questions & Answers | Mechanical Engineering

A. kcal/m²

B. kcal/hr °C

C. kcal/m² hr °C

D. kcal/m hr °C

A. J/m² sec

B. J/m °K sec

C. W/m °K

D. Option (B) and (C) above

A. Absolute temperature (T)

B. f

C. t

D. None of these

A. Glass

B. Water

C. Plastic

D. Air

A. It is impossible to transfer heat from low temperature source to high temperature source

B. Heat transfer by radiation requires no medium

C. All bodies above absolute zero emit radiation

D. Heat transfer in most of the cases takes place by combination of conduction, convection and radiation

A. From one particle of the body to another without the actual motion of the particles

B. From one particle of the body to another by the actual motion of the heated particles

C. From a hot body to a cold body, in a straight line, without affecting the intervening medium

D. None of the above

A. Pb = pa - pv

B. Pb = pa + pv

C. Pb = pa × pv

D. $${\text{Pb}} = \frac{{{\text{pa}}}}{{{\text{pv}}}}$$

A. $${{\text{k}}_1}{{\text{k}}_2}$$

B. $${{\text{k}}_1} + {{\text{k}}_2}$$

C. $$\frac{{{{\text{k}}_1} + {{\text{k}}_2}}}{{{{\text{k}}_1}{{\text{k}}_2}}}$$

D. $$\frac{{2{{\text{k}}_1}{{\text{k}}_2}}}{{{{\text{k}}_1} + {{\text{k}}_2}}}$$

A. Same

B. Higher

C. More or less same

D. Very much lower

A. p = 0, x = 0 and a = 1

B. p = 1, T = 0 and a = 0

C. p = 0, x = 1 and a = 0

D. x = 0, a + p = 0