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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
In S.J. unit, one ton of refrigeration is equal to

210 kJ/ min
840 kJ/ min
21 kJ/ min
420 kJ/ min

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Refrigeration and Air Conditioning
The specific humidity during cooling and dehumidification

Decreases
Remains constant
Increases
None of these

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Refrigeration and Air Conditioning
Critical temperature is the temperature above which

Water will evaporate
A gas will never liquefy
Water will never evaporate
A gas will immediately liquefy

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Refrigeration and Air Conditioning
Formation of frost on evaporator in refrigerator

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

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Refrigeration and Air Conditioning
The conditioned air supplied to the room must have the capacity to take up

Both room sensible heat and latent heat loads
None of the listed here
Room sensible heat load only
Room latent heat load only

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Refrigeration and Air Conditioning
Which of the following refrigerants has lowest freezing point?

Freon-22
Freon-12
NH3
CO2

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