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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The material of pipe lines for a system using Freon as a refrigerant should be

Steel
Brass
Copper
Aluminium

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

2 bar
30 bar
15 bar
8 bar

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Refrigeration and Air Conditioning
Which of the following refrigerant has the maximum ozone depletion potential in the stratosphere?

Fluorine
Ammonia
Carbon dioxide
Sulphur dioxide

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Refrigeration and Air Conditioning
In refrigerators, the temperature difference between the evaporating refrigerant and the medium being cooled should be

As low as possible (3 to 11°C)
Any value
Zero
High, of the order of 25°

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Refrigeration and Air Conditioning
The wet bulb temperature at 100% relative humidity is___ dry bulb temperature.

Higher than
Lower than
None of the listed here
Same as

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Refrigeration and Air Conditioning
Under cooling in a refrigeration cycle

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

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MORE MCQ ON Refrigeration and Air Conditioning

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