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Refrigeration and Air Conditioning

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

20
100
50
Zero

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Refrigeration and Air Conditioning
Wet bulb temperature is the temperature of air recorded by a thermometer, when

The moisture present in it begins to condense
None of these
Its bulb is surrounded by a wet cloth exposed to the air
It is not affected by the moisture present in the air

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Refrigeration and Air Conditioning
Air refrigeration operates on

Reversed Carnot cycle
Brayton cycle
Rankine’s cycle
Carnot cycle

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Refrigeration and Air Conditioning
Presence of moisture in a refrigerant affects the working of

Expansion valve
Evaporator
Condenser
Compressor

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Refrigeration and Air Conditioning
The Freon group of refrigerants are

Halocarbon refrigerants
Hydrocarbon refrigerants
Zoetrope refrigerants
Inorganic refrigerants

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Refrigeration and Air Conditioning
Mass flow ratio of NH₃ in comparison to Freon-12 for same refrigeration load and same temperature limits is of the order of

1: 3
9: 1
1: 9
1: 1

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