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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The difference between dry bulb temperature and dew point temperature, is called

Degree of saturation
Dry bulb depression
Wet bulb depression
Dew point depression

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Refrigeration and Air Conditioning
In aqua ammonia absorption refrigeration system, incomplete rectification leads to accumulation of water in

Absorber
Condenser
None of these
Evaporator

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Refrigeration and Air Conditioning
Freon group of refrigerants are

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

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Refrigeration and Air Conditioning
Short horizontal lines on pressure-enthalpy chart show

Constant entropy lines
Constant temperature lines
Constant pressure lines
Constant total heat lines

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Refrigeration and Air Conditioning
A refrigerant with the highest critical pressure is

R-22
Ammonia
R-12
R-11

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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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