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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Refrigeration in aeroplanes usually employs the following refrigerant

Freon-22
CO2
Air
Freon-11

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Refrigeration and Air Conditioning
The undesirable property of a refrigerant is

Non-explosive
Non-flammable
High boiling point
Non-toxic

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Refrigeration and Air Conditioning
A valve which maintains a constant degree of superheat at the end of the evaporator coil, is called

High side float valve
Thermostatic expansion valve
Automatic expansion valve
Low side float valve

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Refrigeration and Air Conditioning
The temperature of ammonia after compression in a vapour compression system is

70 to 110°C
50 to 70°C
20 to 50°C
None of these

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Refrigeration and Air Conditioning
The refrigerant used for absorption refrigerators working on heat from solar collectors is a mixture of water and

R-12
Sulphur dioxide
Carbon dioxide
Lithium bromide

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Refrigeration and Air Conditioning
Chaperon equation is a relation between

Temperature, pressure, specific volume and enthalpy
Specific volume and enthalpy
Temperature, pressure and enthalpy
Temperature and enthalpy

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MORE MCQ ON Refrigeration and Air Conditioning

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