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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Carbon dioxide is

All of the listed here
Non-flammable
Odourless
Colourless

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Refrigeration and Air Conditioning
The lowest thermal diffusivity is of

Iron
Lead
Aluminium
Rubber

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Refrigeration and Air Conditioning
The C.O.P. of a refrigerator working on a reversed Carnot cycle is (where T₁ = Lowest absolute temperature, and T₂ = Highest absolute temperature)

T₂/ (T₂ - T₁)
T₁ / (T₂ - T₁)
(T₂ - T₁)/T₁
(T₁ - T₂)/T₁

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Refrigeration and Air Conditioning
Moisture in Freon refrigeration system causes

Ineffective refrigeration
Corrosion of whole system
High power consumption
Freezing automatic regulating valve

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Refrigeration and Air Conditioning
Chaperon equation is applicable for registration at

Triple point
Sublimation temperature
Saturation point of liquid
Saturation point of vapour

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Refrigeration and Air Conditioning
A certain refrigerating system has a normal operating suction pressure of 10 kg/cm gauge and condensing pressure of about 67 kg/cm. The refrigerant used is

Carbon dioxide
Freon
Brine
Ammonia

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MORE MCQ ON Refrigeration and Air Conditioning

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