Heat Transfer MCQ Questions & Answers | Chemical Engineering

A. Increases

B. Decreases

C. Remains unchanged

D. May increase or decrease ; depending on temperature

A. Nu = 0.023 Re^0.8.Pr^0.4

B. Nu = $$\frac{\pi }{2}$$ Gz

C. Nu = $$\frac{2}{\pi }$$ Gz

D. Nu = 2 Gz^0.5

A. Capacity of the evaporator is decreased

B. Capacity of the evaporator is increased

C. True temperature drop increases

D. Both B and C

A. Absorptivity = 0

B. Transmissivity = 1

C. Reflectivity = 0

D. All of the above

A. J.m^-2.K^-1

B. J.m^-1.K^-1

C. W.m^-2.K^-1

D. W^-1.m².K

A. 0

B. $$\frac{{{{\text{R}}_2}}}{{{{\text{R}}_1} + {{\text{R}}_2}}}$$

C. 1

D. $${\left( {\frac{{{{\text{R}}_1}}}{{{{\text{R}}_2}}}} \right)^2}$$

A. Increased

B. Decreased

C. No effect on

D. None of these

A. N_st α f

B. N_st α N_Re

C. N_Nu α f

D. N_Re α f

A. Absorber

B. Emitter

C. Both A & B

D. Neither A nor B

A. Both the tube sheets fixed

B. Both the tube sheets floating

C. The top tube sheet floating and bottom tube sheet fixed

D. The top tube sheet fixed and the bottom tube-sheet floating