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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Chaperon equation is applicable for registration at

Saturation point of liquid
Saturation point of vapour
Triple point
Sublimation temperature

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

Domestic refrigerators
Room air conditioners
Water coolers
All of these

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Refrigeration and Air Conditioning
A certain refrigerating system has a normal operating suction pressure of 10 kg/cm gauge and condensing pressure of about 67 kg/cm. The refrigerant used is

Freon
Carbon dioxide
Brine
Ammonia

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Refrigeration and Air Conditioning
The relative coefficient of performance is equal to

(Actual C.O.P.) /(Theoretical C.O.P.)
None of these
(Theoretical C.O.P.)/ (Actual C.O.P.)
(Actual C.O.P.) × (Theoretical C.O.P.)

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

Pressure lines
Total heat lines
Temperature lines
Entropy lines

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Refrigeration and Air Conditioning
Reducing suction pressure in refrigeration cycle

All of these
Lowers compressor capacity because vapour is lighter
Increases power required per ton of refrigeration
Lowers evaporation temperature

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MORE MCQ ON Refrigeration and Air Conditioning

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