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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
All of these
Domestic refrigerators
Water coolers

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Refrigeration and Air Conditioning
When the lower temperature of a refrigerating machine is fixed, then the coefficient of performance can be improved by

Operating the machine at lower speeds
Raising the higher temperature
Operating the machine at higher speeds
Lowering the higher temperature

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Refrigeration and Air Conditioning
The undesirable property of a refrigerant is

Non-flammable
Non-toxic
Non-explosive
High boiling point

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

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

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Refrigeration and Air Conditioning
The vapour pressure of refrigerant should be

Could be anything
Equal to atmospheric pressure
Lower than atmospheric pressure
Higher than atmospheric pressure

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Refrigeration and Air Conditioning
Accumulators should have adequate volume to store refrigerant charge at least

0.75
0.1
0.25
0.5

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MORE MCQ ON Refrigeration and Air Conditioning

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