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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The horizontal and non-uniformly spaced lines on a psychrometric chart indicates

Specific humidity
Dew point temperature
Wet bulb temperature
Dry bulb temperature

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Refrigeration and Air Conditioning
In chemical dehumidification process,

Dew point temperature decreases
Wet bulb temperature decreases
Dry bulb temperature increases
All of these

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Refrigeration and Air Conditioning
In a spray washing system, if the temperature of water is higher than the dry bulb temperature of entering air, then the air is

Heated and humidified
Cooled and humidified
Heated and dehumidified
Cooled and dehumidified

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Refrigeration and Air Conditioning
The evolution of heat of solution takes place in ammonia absorption plant when

Weak solution mixes with strong solution
Ammonia vapour is driven out of solution
Ammonia vapour goes into solution
Lithium bromide mixes with ammonia

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Refrigeration and Air Conditioning
The alignment circle is marked on the psychrometric chart at

26°C DBT and 60% RH
20°C DBT and 60% RH
20°C DBT and 50% RH
26°C DBT and 50% RH

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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)

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

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MORE MCQ ON Refrigeration and Air Conditioning

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