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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Vapour compression refrigeration is somewhat like

Carnot cycle
None of these
Reversed Carnot cycle

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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

18.6 kW
3.72 kW
1.86 kW
7.44 kW

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Refrigeration and Air Conditioning
During sensible cooling,

Wet bulb temperature increases
Partial pressure of vapour remains constant
Specific humidity increases
Relative humidity remains constant

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Refrigeration and Air Conditioning
In vapour compression refrigeration system, refrigerant occurs as liquid between

Expansion valve and evaporator
Compressor and evaporator
Condenser and expansion valve
Compressor and condenser

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Refrigeration and Air Conditioning
In a domestic vapour compression refrigerator, the refrigerant commonly used is

All of these
Ammonia
CO?
R-12

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Refrigeration and Air Conditioning
Short horizontal lines on pressure-enthalpy chart show

Constant pressure lines
Constant temperature lines
Constant total heat lines
Constant entropy lines

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MORE MCQ ON Refrigeration and Air Conditioning

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