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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
An important characteristic of absorption system of refrigeration is

cooling below 0°C
noisy operation
very little power consumption
quiet operation

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Refrigeration and Air Conditioning
The operating pressure for refrigerating units using R-12 as a refrigerant is

30 bar
8 bar
2 bar
15 bar

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Refrigeration and Air Conditioning
Chaperon equation is a relation between

Temperature and enthalpy
Specific volume and enthalpy
Temperature, pressure and enthalpy
Temperature, pressure, specific volume and enthalpy

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Refrigeration and Air Conditioning
Refrigeration in aeroplanes usually employs the following refrigerant

Freon-22
CO2
Air
Freon-11

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Refrigeration and Air Conditioning
Most air cooled condensers are designed to operate with a temperature difference of

5°C
8°C
22°C
14°C

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Refrigeration and Air Conditioning
Ammonia is

Toxic and non-inflammable
Non-inflammable
Non-toxic
Highly toxic and inflammable

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MORE MCQ ON Refrigeration and Air Conditioning

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