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Refrigeration and Air Conditioning

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

Condenser
Absorber
Condenser, absorber and separator (rectifier)
Evaporator

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Refrigeration and Air Conditioning
Efficiency of a Carnot engine is given as 80%. If the cycle direction be reversed, what will be the value of C.O.P. of reversed Carnot Cycle?

0.25
1.25
0.8
0.5

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Refrigeration and Air Conditioning
The vertical and uniformly spaced lines on a psychrometric chart indicates

Wet bulb temperature
Dry bulb temperature
Dew point temperature
Specific humidity

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Refrigeration and Air Conditioning
In chemical dehumidification process,

Dew point temperature decreases
Dry bulb temperature increases
Wet bulb temperature decreases
All of these

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Refrigeration and Air Conditioning
In a reversed Brayton cycle, the heat is absorbed by the air during

Isentropic expansion process
Isentropic compression process
Constant pressure expansion process
Constant pressure cooling process

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Refrigeration and Air Conditioning
The C.O.P. of a refrigerator working on a reversed Carnot cycle is (where T₁ = Lowest absolute temperature, and T₂ = Highest absolute temperature)

(T₁ - T₂)/T₁
T₂/ (T₂ - T₁)
(T₂ - T₁)/T₁
T₁ / (T₂ - T₁)

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