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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

5
1.2
6
0.2

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Refrigeration and Air Conditioning
When the air is passed through an insulated chamber having sprays of water maintained at a temperature higher than the dew point temperature of entering air but lower than its dry bulb temperature, then the air is said to be

Cooled and humidified
Heated and humidified
Cooled and dehumidified
Heated and dehumidified

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Refrigeration and Air Conditioning
The refrigerant for a refrigerator should have

High sensible heat
High total heat
Low latent heat
High latent heat

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Refrigeration and Air Conditioning
The pressure at the inlet of a refrigerant compressor is called

Discharge pressure
Critical pressure
Suction pressure
Back pressure

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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 hour
In 12 hours
In 24 hours
In 1 minute

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Refrigeration and Air Conditioning
In a pressure enthalpy chart, the space to the left of the saturated liquid line represents

Wet vapour region
None of the listed here
Sub-cooled liquid region
Superheated vapour region

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