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Refrigeration and Air Conditioning

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

6
1.2
5
0.2

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Refrigeration and Air Conditioning
Highest temperature encountered in refrigeration cycle should be

Near critical temperature of refrigerant
At critical Temperature
Much below critical temperature
Above critical temperature

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Refrigeration and Air Conditioning
Formation of frost on evaporator in refrigerator

Can be avoided by proper design
Results in loss of heat due to poor heat transfer
Is immaterial
Increases heat transfer rate

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Refrigeration and Air Conditioning
An Electrolux refrigerator is called a ___ absorption system.

None of the listed here
Three fluids
Single fluid
Two fluids

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Refrigeration and Air Conditioning
The process, generally used in summer air conditioning to cool and dehumidify the air, is called

Dehumidification
Humidification
Heating and humidification
Cooling and dehumidification

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Refrigeration and Air Conditioning
Freon group of refrigerants are

Nontoxic and non-inflammable
Inflammable
Toxic
Non-inflammable and toxic

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