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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
An important characteristic of absorption system of refrigeration is

cooling below 0°C
quiet operation
very little power consumption
noisy operation

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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)

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

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Refrigeration and Air Conditioning
The index which correlates the combined effects of air temperature, relative humidity and air velocity on the human body, is known as

Effective temperature
Dew point temperature
None of the listed here
Mean radiant temperature

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

Discharge pressure
Suction pressure
Critical pressure
Back pressure

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Refrigeration and Air Conditioning
For ammonia refrigerating systems, the tubes of a shell and tube condenser are made of

Aluminium
Brass
Steel
Copper

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Refrigeration and Air Conditioning
Presence of moisture in a refrigerant affects the working of

Expansion valve
Compressor
Evaporator
Condenser

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MORE MCQ ON Refrigeration and Air Conditioning

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