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Refrigeration and Air Conditioning

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

Sulphur sticks
Soap and water
All of these
Halide torch

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Refrigeration and Air Conditioning
Under cooling in a refrigeration cycle

O.P remains unaltered
Increases C.O.P
Other factors decide C.O.P
Decreases C.O.P

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Refrigeration and Air Conditioning
A refrigeration cycle operates between condenser temperature of + 27°C and evaporator temperature of -23°C. The Carnot coefficient of performance of cycle will be

0.2
5
6
1.2

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Refrigeration and Air Conditioning
In chemical dehumidification process,

All of these
Wet bulb temperature decreases
Dew point temperature decreases
Dry bulb temperature increases

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Refrigeration and Air Conditioning
The comfort conditions in air conditioning are at (where DBT = Dry bulb temperature, and RH = Relative humidity)

22°C DBT and 60% RH
25°C DBT and 100% RH
20°C DBT and 80% RH
25°C DBT and 40% RH

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Refrigeration and Air Conditioning
The coefficient of performance is the ratio of the refrigerant effect to the

Work done by compressor
Enthalpy increase in compressor
Heat of compression
All of these

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MORE MCQ ON Refrigeration and Air Conditioning

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