The comfort conditions in air conditioning are at (where DBT = Dry bulb temperature, and RH = Relative humidity)

 
In a vapour compression system, the condition of refrigerant before entering the expansion or throttle valve is

The refrigerant supplied to a compressor must be

The freezing point of R-12 is

The thermostatic expansion valve operates on the changes in the

 
The ratio of emissive power of a body to the emissive power of a perfectly black body is called emissivity.

.The capillary tube is not used in large capacity refrigeration systems because

.In a saturated air-water vapour mixture, the

The wet bulb depression is zero when relative humidity is

In a shell and coil condenser, water flows in the shell and the refrigerant in the coil.