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Refrigeration and Air Conditioning

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

Expansion valve
Compressor
Evaporator
Condenser

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Refrigeration and Air Conditioning
The pressure at the outlet of a refrigerant compressor is called

Suction pressure
Back pressure
Discharge pressure
Critical pressure

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Refrigeration and Air Conditioning
A refrigerant compressor is used to

Raise the temperature of the refrigerant
Raise the pressure of the refrigerant
Circulate the refrigerant through the refrigerating system
All of these

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Refrigeration and Air Conditioning
If a heat pump cycle operates between the condenser temperature of +27°C and evaporator temperature of -23°C, then the Carnot COP will be

0.2
6
5
1.2

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Refrigeration and Air Conditioning
One of the purposes of sub cooling the liquid refrigerant is to

Ensure that only liquid and not the vapour enters the expansion (throttling) valve
Reduce compressor discharge temperature
Increase cooling effect
Reduce compressor overheating

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Refrigeration and Air Conditioning
Cooling water is required for following equipment in ammonia absorption plant

Condenser
Condenser, absorber and separator (rectifier)
Evaporator
Absorber

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MORE MCQ ON Refrigeration and Air Conditioning

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