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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Air conditioning means

Heating
All of these
Cooling
Dehumidifying

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Refrigeration and Air Conditioning
A valve which maintains a constant degree of superheat at the end of the evaporator coil, is called

High side float valve
Thermostatic expansion valve
Low side float valve
Automatic expansion valve

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Refrigeration and Air Conditioning
The alignment circle is marked on the psychrometric chart at

20°C DBT and 50% RH
20°C DBT and 60% RH
26°C DBT and 50% RH
26°C DBT and 60% RH

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Refrigeration and Air Conditioning
The lowest temperature during the cycle in a vapour compression system occurs after

Condensation
Evaporation
Compression
Expansion

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Refrigeration and Air Conditioning
The temperature of air recorded by a thermometer, when it is not affected by the moisture present in the air, is called

Dry bulb temperature
None of these
Wet bulb temperature
Dew point temperature

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Refrigeration and Air Conditioning
Which of the following is not a desirable property of a refrigerant?

Large latent heat
Low boiling point
Good electrical conductor
High risibility with oil

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