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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
During sensible cooling of air, specific humidity

Decreases
None of the listed here
Remains constant
Increases

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Refrigeration and Air Conditioning
Highest temperature encountered in refrigeration cycle should be

Above critical temperature
Much below critical temperature
At critical Temperature
Near critical temperature of refrigerant

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Refrigeration and Air Conditioning
The optimum effective temperature for human comfort is

Lower in winter than in summer
Higher in winter than in summer
Same in winter and summer
Not dependent on season

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Refrigeration and Air Conditioning
Accumulators should have adequate volume to store refrigerant charge at least

0.5
0.1
0.25
0.75

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

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

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Refrigeration and Air Conditioning
Bell Coleman cycle is a

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

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