In a vapour absorption refrigerator, the compression of refrigerant is avoided.

Sub-cooling can be achieved by circulating more quantity of cooling water through the condenser.

In a vapour compression refrigerator, the vapour is drawn in the compressor cylinder during its suction stroke and is compressed adiabatically during the compression stroke.

All of the above

The value of C.O.P. is always greater than one.

In a vapour compression system, the condition of refrigerant before entering the compressor is dry saturated vapour.

The space between the saturated liquid line and saturated vapour line in a pressure enthalpy chart is the wet vapour region.

None of the above

the total radiation from a black body per second per unit area is directly proportional to the fourth power of the absolute temperature.

the wavelength corresponding to the maximum energy is proportional to the absolute temperature.

the ratio of the emissive power and absorptive power of all bodies is the same and is equal to the emissive power of a perfectly black body.

None of the above

rotor to static enthalpy rise in the stator

stator to static enthalpy rise in the rotor

rotor to static enthalpy rise in the stage

stator to static enthalpy rise in the stage

In a two-stage reciprocating air compressor with complete intercooling, maximum work is saved.

The minimum work required for a two-stage reciprocating air compressor is double the work required for each stage.

The ratio of the volume of free air delivery per stroke to the swept volume of the piston is called volumetric efficiency.

None of the above