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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Freon group of refrigerants are

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

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Refrigeration and Air Conditioning
A refrigerant compressor is used to

Raise the pressure of the refrigerant
Raise the temperature of the refrigerant
All of these
Circulate the refrigerant through the refrigerating system

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Refrigeration and Air Conditioning
During cooling and dehumidification, dry bulb temperature

None of these
Increases
Remains constant
Decreases

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Refrigeration and Air Conditioning
The specific humidity during heating and humidification process.

Decreases
Increases
None of these
Remains constant

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Refrigeration and Air Conditioning
A refrigerating system operating on reversed Brayton refrigeration cycle is used for maintaining 250 K. If the temperature at the end of constant pressure cooling is 300 K and rise in the temperature of air in the refrigerator is 50 K, then the net work of compression will be (assume air as working substance with Cp = 1 kJ/kg)

25 kJ/kg
50 kJ/kg
125 kJ/kg
100 kJ/kg

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Refrigeration and Air Conditioning
The central air conditioning system has ___________ overall efficiency as compared to individual systems.

Higher
Same
None of these
Lower

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MORE MCQ ON Refrigeration and Air Conditioning

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