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REFRIGERATION AND AIR CONDITIONING

Refrigeration and Air Conditioning
The advantage of dry compression is that

All of these
It permits higher speeds to be used
It results in high volumetric and mechanical efficiency
It permits complete evaporation in the evaporator

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Refrigeration and Air Conditioning
The leaks in a refrigeration system using Freon are detected by

Sulphur sticks which on detection gives white smoke
Smelling
Using reagents
Halide torch which on detection produces greenish flame lighting

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Refrigeration and Air Conditioning
The higher temperature in vapour compression cycle occurs at

Compressor discharge
Receiver
Expansion valve
Evaporator

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Refrigeration and Air Conditioning
Highest temperature encountered in refrigeration cycle should be

Above critical temperature
At critical Temperature
Near critical temperature of refrigerant
Much below critical temperature

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Refrigeration and Air Conditioning
In actual air-conditioning applications for R-12 and R-22, and operating at a condenser temperature of 40° C and an evaporator temperature of 5° C, the heat rejection factor is about

1.25
5.12
1
2.15

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