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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The wet bulb temperature during sensible heating of air

Remains constant
Decreases
Increases
None of these

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Refrigeration and Air Conditioning
During sensible heating of air _________ decreases.

Specific humidity
Dry bulb temperature
Wet bulb temperature
Relative humidity

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Refrigeration and Air Conditioning
A refrigerating system operating on reversed Brayton refrigeration cycle is used for maintaining 250 K. If the temperature at the end of constant pressure cooling is 300 K and rise in the temperature of air in the refrigerator is 50 K, then the net work of compression will be (assume air as working substance with Cp = 1 kJ/kg)

125 kJ/kg
25 kJ/kg
100 kJ/kg
50 kJ/kg

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Refrigeration and Air Conditioning
The capacity of a domestic refrigerator is in the range of

3 to 5 TR
0.1 to 0.3 TR
5 to 7 TR
1 to 3 TR

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Refrigeration and Air Conditioning
Bell Coleman cycle is a

Reversed Joule cycle
Reversed Rankine cycle
Reversed Carnot cycle
Reversed Otto cycle

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Refrigeration and Air Conditioning
In a vapour compression system, the condition of refrigerant before entering the expansion or throttle valve is

Dry vapour
Very wet vapour
High pressure saturated liquid
Wet vapour

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