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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The wet bulb temperature at 100% relative humidity is ________ dew point temperature.

Same as
Lower than
Higher than
None of these

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

Single fluid
None of the listed here
Two fluids
Three fluids

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Refrigeration and Air Conditioning
The coefficient of performance is the ratio of the refrigerant effect to the

Heat of compression
All of these
Work done by compressor
Enthalpy increase in compressor

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Refrigeration and Air Conditioning
The freezing point of sulphur dioxide is

-135.8°C
-56.6°C
-77.7°C
-75.2°C

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Refrigeration and Air Conditioning
For evaporators and condensers, for the given conditions, the logarithmic mean temperature difference (tm) for parallel flow is ________ that for counter flow.

Greater than
None of these
Equal to
Less than

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

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