low

high

zero

none of these

the better insulation must be put inside

the better insulation must be put outside

one could place either insulation on either side

one should take into account the steam temperature before deciding as to which insulation is put where

Yes

No

Unknown

None

cooled and humidified

cooled and dehumidified

heated and humidified

heated and dehumidified

The performance of the vapour compression refrigerator varies considerably with both vaporising and condensing temperatures.

In vapour compression cycle, the useful part of the heat transfer is at the condenser.

In ammonia-hydrogen (electolux) refrigerator, no compressor, pump or fan is required.

The effect of under-cooling the liquid refrigerant is to decrease the coefficient of performance.