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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The temperature of ammonia after compression in a vapour compression system is

50 to 70°C
None of these
70 to 110°C
20 to 50°C

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Refrigeration and Air Conditioning
Air refrigerator works on

Both (A) and (B)
Reversed Carnot cycle
Bell Coleman cycle
None of these

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Refrigeration and Air Conditioning
Under cooling in a refrigeration cycle

Other factors decide C.O.P
Increases C.O.P
O.P remains unaltered
Decreases C.O.P

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Refrigeration and Air Conditioning
An Electrolux refrigerator is called a ___ absorption system.

Two fluids
Single fluid
None of the listed here
Three fluids

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Refrigeration and Air Conditioning
In Electrolux refrigerator

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

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Refrigeration and Air Conditioning
The sensible heat factor during the heating and humidification process is given by (where h₁ = Enthalpy of air entering the heating coil, h₂ = Enthalpy of air leaving the heating coil, and hA = Enthalpy of air at the end of humidification process)

(h1 - h2)/ (hA - h2)
(h2 - hA)/ (h1 - h2)
(hA - h2)/ (h1 - h2)
(hA - h1)/ (h2 - h1)

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