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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

2.15
1
1.25
5.12

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Refrigeration and Air Conditioning
In vapour compression cycle the condition off refrigerant is dry saturated vapour

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

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Refrigeration and Air Conditioning
The specific humidity during dehumidification process

None of these
Decreases
Remains constant
Increases

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Refrigeration and Air Conditioning
The wet bulb temperature during sensible cooling of air

Remains constant
Increases
Decreases
None of these

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Refrigeration and Air Conditioning
The humidity ratio or specific humidity is the mass of water vapour present in

1 m3 of wet air
1 kg of dry air
1 kg of wet air
1 m3 of dry air

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Refrigeration and Air Conditioning
The atmospheric air at dry bulb temperature of 15°C enters a heating coil maintained at 40°C. The air leaves the heating coil at 25°C. The bypass factor of the heating coil is

0.376
0.67
0.4
0.6

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