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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The alignment circle is marked on the psychrometric chart at

26°C DBT and 50% RH
26°C DBT and 60% RH
20°C DBT and 60% RH
20°C DBT and 50% RH

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Refrigeration and Air Conditioning
Critical temperature is the temperature above which

A gas will never liquefy
A gas will immediately liquefy
Water will never evaporate
Water will evaporate

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Refrigeration and Air Conditioning
The change in evaporator temperature in a refrigeration cycle, as compared to change in condenser temperature, influences the value of C.O.P.

More
Unpredictable
Equally
Less

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

R-12
R-11
Ammonia
R-22

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

Halide torch
Sulphur sticks
All of these
Soap and water

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Refrigeration and Air Conditioning
Most thermostatic expansion valves are set for a superheat of

20°C
10°C
15°C
5°C

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MORE MCQ ON Refrigeration and Air Conditioning

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