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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The pressure at the outlet of a refrigerant compressor is called

Critical pressure
Discharge pressure
Back pressure
Suction pressure

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

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

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

All of these
Halide torch
Sulphur sticks
Soap and water

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Refrigeration and Air Conditioning
The vertical and uniformly spaced lines on a psychrometric chart indicates

Dew point temperature
Specific humidity
Dry bulb temperature
Wet bulb temperature

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Refrigeration and Air Conditioning
Which of the following statement is correct for ammonia as a refrigerant?

It requires large displacement per TR compared to fluoro carbons.
It reacts with copper and its alloys.
All of these
It is toxic to mucous membranes.

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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
High, of the order of 25°
Zero

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MORE MCQ ON Refrigeration and Air Conditioning

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