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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
An evaporator is also known as

Chilling coil
Freezing coil
All of these
Cooling coil

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Refrigeration and Air Conditioning
In S.J. unit, one ton of refrigeration is equal to

21 kJ/ min
420 kJ/ min
210 kJ/ min
840 kJ/ min

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Refrigeration and Air Conditioning
Wet bulb temperature is the temperature of air recorded by a thermometer, when

Its bulb is surrounded by a wet cloth exposed to the air
None of these
It is not affected by the moisture present in the air
The moisture present in it begins to condense

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Refrigeration and Air Conditioning
Pressure of water vapour is given by

μ/[1 - (1 - μ) (Ps/Pb)]
[Pv (Pb - Pd)]/ [Pd (Pb - Pv)]
0.622 Pv/ (Pb - Pv)
None of these

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Refrigeration and Air Conditioning
While designing the refrigeration system of an aircraft, the prime consideration is that the

Power per TR is low
Mass of the refrigeration equipment is low
Mass of refrigerant circulated in the system is low
System has high C.O.P.

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

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

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MORE MCQ ON Refrigeration and Air Conditioning

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