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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The human body feels comfortable when the heat stored in the body is

None of these
Zero
Negative
Positive

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Refrigeration and Air Conditioning
The refrigerant used in small tonnage commercial machines (hermetically sealed units) is

R-12
Sulphur dioxide
Carbon dioxide
Ammonia

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Refrigeration and Air Conditioning
A standard ice point temperature corresponds to the temperature of

Ice at 4°C
Water at 0°C
Mixture of ice and water under equilibrium conditions
Solid and dry ice

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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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Refrigeration and Air Conditioning
One ton of refrigeration is equal to the refrigeration effect corresponding to melting of 1000 kg of ice

In 1 minute
In 12 hours
In 24 hours
In 1 hour

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Refrigeration and Air Conditioning
The undesirable property of a refrigerant is

Non-toxic
High boiling point
Non-flammable
Non-explosive

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MORE MCQ ON Refrigeration and Air Conditioning

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