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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The wet bulb temperature at 100% relative humidity is ________ dew point temperature.

Same as
None of these
Higher than
Lower than

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Refrigeration and Air Conditioning
The pressure at the inlet of a refrigerant compressor is called

Discharge pressure
Suction pressure
Back pressure
Critical pressure

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Refrigeration and Air Conditioning
The operating temperature of a cold storage is -2°C. The heat leakage from the surrounding is 30 kW for the ambient temperature of 40°C. The actual C.O.P. of refrigeration plant used is one fourth that of ideal plant working between the same temperatures. The power required to drive the plant is

18.6 kW
7.44 kW
1.86 kW
3.72 kW

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Refrigeration and Air Conditioning
The humidity ratio or specific humidity is the mass of water vapour present in

1 m3 of dry air
1 kg of dry air
1 m3 of wet air
1 kg of wet air

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Refrigeration and Air Conditioning
Which of the following refrigerant has the highest freezing point.

Ammonia
Sulphur dioxide
Carbon dioxide
R-12

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Refrigeration and Air Conditioning
The reduced ambient air cooling system has

One cooling turbine and one heat exchanger
One cooling turbine and two heat exchangers
Two cooling turbines and two heat exchangers
Two cooling turbines and one heat exchanger

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