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Refrigeration and Air Conditioning

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

Decreases
None of these
Remains constant
Increases

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Refrigeration and Air Conditioning
The colour of the flame of halide torch, in case of leakage of Freon refrigerant, will change to

Bright green
Orange
Yellow
Red

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Refrigeration and Air Conditioning
Where does the lowest temperature occur in a vapour compression cycle?

Condenser
Evaporator
Compressor
Expansion valve

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Refrigeration and Air Conditioning
The superheated vapour region, in a pressure enthalpy chart, is represented by the space

To the right of saturated liquid line
To the left of saturated liquid line
None of these
Between the saturated liquid line and saturated vapour line

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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)

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

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Refrigeration and Air Conditioning
Bell Coleman cycle is a

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

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MORE MCQ ON Refrigeration and Air Conditioning

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