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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The wet bulb temperature during sensible cooling of air

Decreases
None of these
Remains constant
Increases

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Refrigeration and Air Conditioning
Accumulators should have adequate volume to store refrigerant charge at least

0.75
0.25
0.1
0.5

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Refrigeration and Air Conditioning
A certain refrigerating system has a normal operating suction pressure of 10 kg/cm gauge and condensing pressure of about 67 kg/cm. The refrigerant used is

Carbon dioxide
Ammonia
Freon
Brine

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Refrigeration and Air Conditioning
Allowable pressure on high pressure side or ammonia absorption system is of the order of

56 bars
24 bars
Slightly above atmospheric pressure
Atmospheric pressure

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Refrigeration and Air Conditioning
The specific humidity during dehumidification process

Increases
None of these
Decreases
Remains constant

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Refrigeration and Air Conditioning
The lower horizontal line of the refrigeration cycle plotted on pressure-enthalpy diagram represents

Metering of the refrigerant liquid
Condensation of the refrigerant vapour
Evaporation of the refrigerant liquid
Compression of the refrigerant vapour

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