near critical temperature of refrigerant

above critical temperature

at critica. temperature

much below critical temperature

less than 2 kg

more than or equal to 3.65 kg

more than 10 kg

there is no such consideration

Freon-11

Freon-22

C02

ammonia.

reduce compressor overheating

reduce compressor discharge temperature

increase cooling effect

ensure that only liquid and not the vapour enters the expansion (throttling) valve

always less than unity

always more than unity

equal to unity

any one of the above