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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Air refrigeration cycle is used in

Commercial refrigerators
Air conditioning
Domestic refrigerators
Gas liquefaction

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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
1.2
6
5

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Refrigeration and Air Conditioning
During humidification process, __________ increases.

Dry bulb temperature
Specific humidity
Relative humidity
Wet bulb temperature

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Refrigeration and Air Conditioning
The refrigerant after condensation process is cooled below the saturation temperature before throttling. Such a process is called

Super-cooling
None of the listed here
Normal cooling
Sub-cooling or under-cooling

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Refrigeration and Air Conditioning
During heating and dehumidification process, dry bulb temperature

Remains constant
None of these
Decreases
Increases

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Refrigeration and Air Conditioning
The operating temperature of a cold storage is -2°C. The heat leakage from the surrounding is 30 kW for the ambient temperature of 40°C. The actual C.O.P. of refrigeration plant used is one fourth that of ideal plant working between the same temperatures. The power required to drive the plant is

1.86 kW
3.72 kW
7.44 kW
18.6 kW

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