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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The condition of refrigerant after passing through the condenser in a vapour compression system is

Wet vapour
Saturated liquid
Superheated vapour
Dry saturated vapour

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Refrigeration and Air Conditioning
The boiling point of ________ is 10.5°C.

Ammonia
R-12
Carbon dioxide
Sulphur dioxide

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Refrigeration and Air Conditioning
During a refrigeration cycle, heat is rejected by the refrigerant in a

Evaporator
Condenser
Compressor
Expansion valve

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Refrigeration and Air Conditioning
In aqua ammonia and Lithium bromide water absorption refrigeration systems, the refrigerants are respectively

Water and water
Water and lithium bromide
Ammonia and water
Ammonia and lithium bromide

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Refrigeration and Air Conditioning
Efficiency of a Carnot engine is given as 80%. If the cycle direction be reversed, what will be the value of C.O.P. of reversed Carnot Cycle?

0.25
1.25
0.5
0.8

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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

Brine
Carbon dioxide
Freon
Ammonia

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