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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Bell Coleman cycle is a

Reversed Carnot cycle
Reversed Rankine cycle
Reversed Joule cycle
Reversed Otto cycle

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Refrigeration and Air Conditioning
In a psychrometric process, the sensible heat added is 30 kJ/s and the latent heat added is 20 kJ/s. The sensible heat factor for the process will be

0.3
0.6
1.5
0.67

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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)

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

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Refrigeration and Air Conditioning
The human body feels comfortable when the heat stored in the body is

None of these
Zero
Negative
Positive

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Refrigeration and Air Conditioning
During heating and humidification, the final relative humidity of air

Is lower than that of the entering air
None of the listed here
Is higher than that of the entering air
Can be lower or higher than that of the entering air

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Refrigeration and Air Conditioning
In a domestic vapour compression refrigerator, the refrigerant commonly used is

All of these
CO?
Ammonia
R-12

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