In S.J. unit, one ton of refrigeration is equal to___________________?

A. 210 kj/min
B. 21 kj/min
C. 420 kj/min
D. 840 kj/min

The boiling point of ammonia is___________________?

A. -100°c
B. -50°c
C. – 33.3°c
D. 0°c

In vapor compression cycle, the condition of refrigerant is high pressure saturated liquid________________?

A. After passing through the condenser
B. Before passing through the condenser
C. After passing through the expansion or thiottle valve
D. Before entering the expansion valve

Clapeyron equation is a relation between___________________?

A. temperature, pressure and enthalpy
B. specific volume and enthalpy
C. temperature and enthalpy
D. temperature, pressure, and specil volume

A refrigerant should have _____________________? Pick up the wrong statement ?

A. Tow specific heat of liquid
B. High boiling point
C. High latent heat of vaporisation
D. Higher critical temperature

In vapor compression cycle, the condition of refrigerant is very wet vapor________________?

A. after passing through the condenser
B. before passing through the condenser
C. after passing through the expansion or throttle valve
D. before entering the expansion valve

Clapeyron equation is applicable for registration at___________________?

A. Saturation point of vapor
B. Saturation point of liquid
C. Sublimation temperature
D. Triple point

The relative coefficient of performance is_____________________?

A. Actual cop/fheoretical cop
B. Theoretical cop/actual cop
C. Actual cop x theoretical cop
D. 1-actual cop x theoretical cop

Which of the following cycles uses air as the refrigerant__________________?

A. Ericsson
B. Stirling
C. Carnot
D. Bell-coleman

Two coplanar couples having equal and opposite moments_________________?

A. balance each other
B. produce a couple and an unbalanced force
C. are equivalent
D. produce a moment of couple