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Refrigeration and Air Conditioning

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

CO2
Freon-11
Freon-22
Air

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Refrigeration and Air Conditioning
Most thermostatic expansion valves are set for a superheat of

10°C
15°C
20°C
5°C

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Refrigeration and Air Conditioning
Condensing temperature in a refrigerator is the temperature

Of evaporator
At which refrigerant gas becomes liquid
Of cooling medium
Of freezing zone

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Refrigeration and Air Conditioning
A vapour absorption refrigeration system

Gives quiet operation
Cools below 0°C
Requires little power consumption
Gives noisy operation

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Refrigeration and Air Conditioning
Chaperon equation is a relation between

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

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Refrigeration and Air Conditioning
In S.J. unit, one ton of refrigeration is equal to

840 kJ/ min
420 kJ/ min
21 kJ/ min
210 kJ/ min

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MORE MCQ ON Refrigeration and Air Conditioning

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