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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The refrigerant used for absorption refrigerators working on heat from solar collectors is a mixture of water and

Carbon dioxide
Sulphur dioxide
R-12
Lithium bromide

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

0.1
0.25
0.5
0.75

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Refrigeration and Air Conditioning
The thermostatic expansion valve operates on the changes in the

Degree of superheat at exit from the evaporator
None of these
Pressure in the evaporator
Temperature of the evaporator

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Refrigeration and Air Conditioning
For evaporators and condensers, for the given conditions, the logarithmic mean temperature difference (tm) for parallel flow is ________ that for counter flow.

None of these
Greater than
Less than
Equal to

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Refrigeration and Air Conditioning
The formation of frost on cooling coils in a refrigerator

Improves C.O.P. of the system
Increases heat transfer
Increases power consumption
Reduces power consumption

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Refrigeration and Air Conditioning
In vapour compression cycle, the condition of refrigerant is very wet vapour

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

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MORE MCQ ON Refrigeration and Air Conditioning

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