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Refrigeration and Air Conditioning

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

Brine
Carbon dioxide
Ammonia
Freon

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Refrigeration and Air Conditioning
In a refrigerating machine, heat rejected is _________ heat absorbed.

None of these
Less than
Equal to
Greater than

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

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

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Refrigeration and Air Conditioning
The reduced ambient air cooling system has

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

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Refrigeration and Air Conditioning
The heat rejection factor (HRF) is given by

1 - (1/C.O.P)
1 + C.O.P
1 + (1/C.O.P)
1 - C.O.P.

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Refrigeration and Air Conditioning
One tonne of refrigeration (1TR) means that the heat removing capacity is

210 kJ/min
21 kJ/min
420 kJ/min
620 kJ/min

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MORE MCQ ON Refrigeration and Air Conditioning

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