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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The colour of the flame of halide torch, in case of leakage of Freon refrigerant, will change to

Yellow
Red
Orange
Bright green

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Refrigeration and Air Conditioning
In which of the following refrigeration system, waste heat can be effectively used?

Vapour absorption cycle
Air refrigeration cycle
None of the listed here
Vapour compression cycle

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Refrigeration and Air Conditioning
The vertical and uniformly spaced lines on a psychrometric chart indicates

Dew point temperature
Specific humidity
Wet bulb temperature
Dry bulb temperature

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Refrigeration and Air Conditioning
The desirable property of a refrigerant is

All of these
High critical temperature
High latent heat of vaporisation
Low boiling point

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Refrigeration and Air Conditioning
In a flooded evaporator refrigerator, an accumulator at suction of compressor is used to

Collect liquid refrigerant and prevent it from going to compressor
Superheat the vapour
Collect vapours
Detect liquid in vapour

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Refrigeration and Air Conditioning
For air conditioning the operation theater in a hospital, the percentage of outside air in the air supplied is

Zero
100
50
20

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