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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
quiet operation
very little power consumption

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Refrigeration and Air Conditioning
Freon group of refrigerants are

Toxic
Non-inflammable and toxic
Inflammable
Nontoxic and non-inflammable

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Refrigeration and Air Conditioning
The refrigerant after condensation process is cooled below the saturation temperature before throttling. Such a process is called

Normal cooling
None of the listed here
Super-cooling
Sub-cooling or under-cooling

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Refrigeration and Air Conditioning
The condensing pressure due to the presence of non-condensable gases, as compared to that actually required for condensing temperatures without non-condensable gases,

Will be higher
Will remain unaffected
Will be lower
May be higher or lower depending upon the nature of non-condensable gases

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Refrigeration and Air Conditioning
Wet bulb temperature is the temperature of air recorded by a thermometer, when

Its bulb is surrounded by a wet cloth exposed to the air
None of these
It is not affected by the moisture present in the air
The moisture present in it begins to condense

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Refrigeration and Air Conditioning
The dry bulb temperature lines, on the psychrometric chart are

Curved lines
Vertical and uniformly spaced
Horizontal and uniformly spaced
Horizontal and non-uniformly spaced

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MORE MCQ ON Refrigeration and Air Conditioning

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