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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
If a heat pump cycle operates between the condenser temperature of +27°C and evaporator temperature of -23°C, then the Carnot COP will be

6
1.2
0.2
5

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Refrigeration and Air Conditioning
A pressure gauge on the discharge side of a refrigerant compressor reads too high. The reasons will be

Water temperature being high
All of these
Dirty condenser surface
Lack of cooling water

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

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

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

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

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Refrigeration and Air Conditioning
The evaporator used in household refrigerators is

None of these
Defrosting evaporator
Frosting evaporator
Non-frosting evaporator

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

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

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MORE MCQ ON Refrigeration and Air Conditioning

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