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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
In actual air-conditioning applications for R-12 and R-22, and operating at a condenser temperature of 40° C and an evaporator temperature of 5° C, the heat rejection factor is about

1
2.15
5.12
1.25

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Refrigeration and Air Conditioning
Short horizontal lines on pressure-enthalpy chart show

Constant pressure lines
Constant temperature lines
Constant entropy lines
Constant total heat lines

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

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

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Refrigeration and Air Conditioning
During a refrigeration cycle, heat is rejected by the refrigerant in a

Evaporator
Compressor
Condenser
Expansion valve

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Refrigeration and Air Conditioning
The Freon group of refrigerants are

Inorganic refrigerants
Hydrocarbon refrigerants
Halocarbon refrigerants
Zoetrope refrigerants

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

0.25
0.5
0.75
0.1

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MORE MCQ ON Refrigeration and Air Conditioning

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