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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

5
6
1.2
0.2

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Refrigeration and Air Conditioning
In refrigerator, liquid receiver is required between condenser and flow controlling device, if quantity of refrigerant for system is

More than or equal to 3.65 kg
Less than 2 kg
There is no such consideration
More than 10 kg

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Refrigeration and Air Conditioning
One ton refrigeration corresponds to

50 kcal/ min
80 kcal/ min
50 kcal/ hr
80 kcal/ hr

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Refrigeration and Air Conditioning
The emissivity of a polished silver body is ____ as compared to black body.

Very low
Same
Low
High

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Refrigeration and Air Conditioning
In Electrolux refrigerator

Ammonia is absorbed in water
Hydrogen evaporates in ammonia
Ammonia is absorbed in hydrogen
Ammonia evaporates in hydrogen

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Refrigeration and Air Conditioning
The relative coefficient of performance is equal to

(Actual C.O.P.) /(Theoretical C.O.P.)
(Theoretical C.O.P.)/ (Actual C.O.P.)
None of these
(Actual C.O.P.) × (Theoretical C.O.P.)

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