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Refrigeration and Air Conditioning

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

Greater than
Less than
None of the listed here
Equal to

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Refrigeration and Air Conditioning
The leakage in a refrigeration system using ammonia is detected by

Soap and water
Sulphur sticks
All of these
Halide torch

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Refrigeration and Air Conditioning
In air-conditioning of aeroplanes, using air as a refrigerant, the cycle used is

Reversed Brayton cycle
Reversed Carnot cycle
Reversed Otto cycle
Reversed Joule cycle

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Refrigeration and Air Conditioning
In aircraft, air refrigeration Cycle is used because of

Low weight per tonne of refrigeration
Higher coefficient of performance
Low temperature at high altitudes
High heat transfer rate

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Refrigeration and Air Conditioning
Moisture in Freon refrigeration system causes

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

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Refrigeration and Air Conditioning
Critical pressure of a liquid is the pressure

Above which liquid becomes vapour
Above which liquid will remain liquid
Above which liquid becomes gas
Above which liquid becomes solid

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MORE MCQ ON Refrigeration and Air Conditioning

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