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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
1.25
5.12
2.15

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Refrigeration and Air Conditioning
The coefficient of performance of Heat Pump is always ___ one.

Less than
Equal to
Greater than
None of the listed here

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Refrigeration and Air Conditioning
In a refrigeration system, the expansion device is connected between the

Evaporator and compressor
Condenser and receiver
Compressor and condenser
Receiver and evaporator

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Refrigeration and Air Conditioning
The boiling point of ammonia is

-33.3°C
-77.7°C
-10.5°C
-30°C

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Refrigeration and Air Conditioning
Air conditioning means

Cooling
All of these
Heating
Dehumidifying

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Refrigeration and Air Conditioning
A certain refrigerating system has a normal operating suction pressure of 10 kg/cm gauge and condensing pressure of about 67 kg/cm. The refrigerant used is

Carbon dioxide
Brine
Freon
Ammonia

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