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Refrigeration and Air Conditioning

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

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

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Refrigeration and Air Conditioning
On the pressure-enthalpy diagram, condensation and desuperheating is represented by a horizontal line because the process

Takes place at constant pressure
Takes place at constant temperature
Takes place at constant entropy
Involves no change in volume

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Refrigeration and Air Conditioning
If a gas is to be liquefied, its temperature must be

None of these
Reduced to a value below its critical temperature
Equal to critical temperature
Increased to a value above its critical temperature

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Refrigeration and Air Conditioning
Presence of moisture in a refrigerant affects the working of

Compressor
Condenser
Evaporator
Expansion valve

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Refrigeration and Air Conditioning
Most air cooled condensers are designed to operate with a temperature difference of

22°C
5°C
8°C
14°C

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Refrigeration and Air Conditioning
Vapour compression refrigeration is somewhat like

Reversed Carnot cycle
Carnot cycle
None of these

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