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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The wet bulb temperature during sensible heating of air

Decreases
None of these
Increases
Remains constant

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Refrigeration and Air Conditioning
In vapour compression cycle, the condition of refrigerant is high pressure saturated liquid

After passing through the expansion or throttle valve
Before passing through the condenser
After passing through the condenser
Before entering the expansion valve

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

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

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Refrigeration and Air Conditioning
During adiabatic saturation process on unsaturated air ___ remains constant.

Dew point temperature
Dry bulb temperature
Relative humidity
Wet bulb temperature

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Refrigeration and Air Conditioning
The wet bulb depression indicates _________ humidity of the air.

Relative
Specific
Absolute
None of these

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