Which of the following units is not present in both the vapor compression refrigeration system and absorption refrigeration system ?

Which of the following is an undesirable characteristic of a refrigerant ?

A. It should be non-explosive

B. It should have a sub-atmospheric vapor pressure at the temperature in refrigerator coils

C. Its vapor pressure at the condenser temperature should be very high

D. None of these

Sound waves propagation in air exemplifies an ______________ process?

A. Adiabatic

B. Isothermal

C. Isometric

D. None of these

Work done may be calculated by the expression ∫ p dA for _____________ processes ?

A. Non-flow reversible

B. Adiabatic

C. Both A. and B

D. Neither A. nor B

1m3 of an ideal gas at 500 K and 1000 kPa expands reversibly to 5 times its initial volume in an insulated container. If the specific heat capacity (at constant pressure) of the gas is 21 J/mole . K, the final temperature will be ?

A. 35 K

B. 174 K

C. 274 K

D. 154 K

In the reaction; N2 + O2 ⇌ 2NO, increasing the pressure will result in_________________?

A. Shifting the equilibrium towards right

B. Shifting the equilibrium towards left

C. No change in equilibrium condition

D. None of these