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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The capillary tube, as an expansion device, is used in

Room air conditioners
Water coolers
All of these
Domestic refrigerators

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Refrigeration and Air Conditioning
In vapour compression cycle, the condition of refrigerant is high pressure saturated liquid

After passing through the condenser
After passing through the expansion or throttle valve
Before entering the expansion valve
Before passing through the condenser

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Refrigeration and Air Conditioning
Vertical lines on pressure-enthalpy chart show constant

Pressure lines
Temperature lines
Total heat lines
Entropy lines

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Refrigeration and Air Conditioning
The temperature of air recorded by a thermometer, when it is not affected by the moisture present in the air, is called

Wet bulb temperature
None of these
Dry bulb temperature
Dew point temperature

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Refrigeration and Air Conditioning
A reversible engine has ideal thermal efficiency of 30%. When it is used as a refrigerating machine with all other conditions unchanged, the coefficient of performance will be

3.33
4.33
1.33
2.33

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Refrigeration and Air Conditioning
A refrigerant compressor is used to

Circulate the refrigerant through the refrigerating system
Raise the pressure of the refrigerant
All of these
Raise the temperature of the refrigerant

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MORE MCQ ON Refrigeration and Air Conditioning

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