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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The refrigeration effect in a dry evaporator compared to flooded evaporator in a similar plant is

Same
More or less depending on ambient conditions
More
Less

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Refrigeration and Air Conditioning
Condensing temperature in a refrigerator is the temperature

Of cooling medium
Of evaporator
Of freezing zone
At which refrigerant gas becomes liquid

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Refrigeration and Air Conditioning
When the air is passed through an insulated chamber having sprays of water maintained at a temperature higher than the dew point temperature of entering air but lower than its dry bulb temperature, then the air is said to be

Cooled and humidified
Heated and humidified
Heated and dehumidified
Cooled and dehumidified

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

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

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Refrigeration and Air Conditioning
Air refrigeration operates on

Carnot cycle
Brayton cycle
Reversed Carnot cycle
Rankine’s cycle

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Refrigeration and Air Conditioning
The advantage of dry compression is that

It permits complete evaporation in the evaporator
All of these
It results in high volumetric and mechanical efficiency
It permits higher speeds to be used

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MORE MCQ ON Refrigeration and Air Conditioning

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