Refrigeration And Air Conditioning MCQ Questions & Answers | Mechanical Engineering

A. $${{\text{N}}_{\text{N}}} = \frac{{{\text{h}}l}}{{\text{k}}}$$

B. $${{\text{N}}_{\text{N}}} = \frac{{\mu {{\text{c}}_{\text{p}}}}}{{\text{k}}}$$

C. $${{\text{N}}_{\text{N}}} = \frac{{\rho {\text{V}}l}}{\mu }$$

D. $${{\text{N}}_{\text{N}}} = \frac{{{{\text{V}}^2}}}{{{\text{t}}{{\text{c}}_{\text{p}}}}}$$

A. B.P.F. - 1

B. 1 - B.P.F.

C. $$\frac{1}{{{\text{B}}{\text{.P}}{\text{.F}}{\text{.}}}}$$

D. 1 + B.P.F.

A. Non-toxic

B. Non-flammable

C. Non-explosive

D. High boiling point

A. Low boiling point

B. High critical temperature

C. High latent heat of vaporisation

D. All of these

A. 2 bar

B. 8 bar

C. 15 bar

D. 30 bar

A. Condenser

B. Evaporator

C. Absorber

D. Condenser, absorber and separator (rectifier)

A. Same

B. Less

C. More

D. None of these

A. Water and water

B. Water and lithium bromide

C. Ammonia and lithium bromide

D. Ammonia and water

A. Which lies between the dry bulb and wet bulb temperatures of the incoming stream

B. Which lies between the wet bulb and dew point temperatures of the incoming stream

C. Which is lower than the dew point temperature of the incoming stream

D. Of adiabatic saturation of incoming stream

A. Remains constant

B. Increases

C. Decreases

D. None of these