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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The superheating in a refrigeration cycle

Increases C.O.P.
None of these
Does not alter C.O.P.
Decreases C.O.P.

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Refrigeration and Air Conditioning
The comfort conditions in air conditioning are at (where DBT = Dry bulb temperature, and RH = Relative humidity)

22°C DBT and 60% RH
25°C DBT and 40% RH
20°C DBT and 80% RH
25°C DBT and 100% RH

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Refrigeration and Air Conditioning
The alignment circle is marked on the psychrometric chart at

20°C DBT and 50% RH
20°C DBT and 60% RH
26°C DBT and 60% RH
26°C DBT and 50% RH

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

0.5
0.1
0.75
0.25

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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
1.33
4.33
2.33

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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

Orange
Yellow
Red
Bright green

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MORE MCQ ON Refrigeration and Air Conditioning

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