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Refrigeration and Air Conditioning

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

Freon
Carbon dioxide
Ammonia
Brine

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Refrigeration and Air Conditioning
The specific humidity during cooling and dehumidification

Remains constant
None of these
Decreases
Increases

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Refrigeration and Air Conditioning
The wet bulb depression indicates _________ humidity of the air.

Relative
None of these
Specific
Absolute

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Refrigeration and Air Conditioning
In Electrolux refrigerator

Ammonia is absorbed in water
Ammonia evaporates in hydrogen
Ammonia is absorbed in hydrogen
Hydrogen evaporates in ammonia

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Refrigeration and Air Conditioning
If a heat pump cycle operates between the condenser temperature of +27°C and evaporator temperature of -23°C, then the Carnot COP will be

5
1.2
0.2
6

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Refrigeration and Air Conditioning
The freezing point of R-12 is

-86.6°C
-107.7°C
-135.8°C
-95.2°C

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MORE MCQ ON Refrigeration and Air Conditioning

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