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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
In order to collect liquid refrigerant and to prevent it from going to a ________, a device known as accumulator is used at the suction of compressor.

Condenser
Compressor
Evaporator
Expansion valve

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Refrigeration and Air Conditioning
The lowest thermal diffusivity is of

Iron
Aluminium
Rubber
Lead

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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)

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

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Refrigeration and Air Conditioning
At lower temperatures and pressures, the latent heat of vaporisation of a refrigerant

remains same
increases
depends on other factors
decreases

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Refrigeration and Air Conditioning
The coefficient of performance of Heat Pump is always ___ one.

None of the listed here
Equal to
Less than
Greater than

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Refrigeration and Air Conditioning
Air conditioning means

All of these
Cooling
Heating
Dehumidifying

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MORE MCQ ON Refrigeration and Air Conditioning

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