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Refrigeration and Air Conditioning

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

Relative
Specific
Absolute
None of these

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Refrigeration and Air Conditioning
The coefficient of performance (C.O.P.) of a refrigerator working as a heat pump is given by

O.P)R
O.P.)P = (
(
O.P.)R + 1
O.P)P = (
O.P)R - 1
O.P)P = (
(
(
O.P.)R + 2
O.P.)P = (
(

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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)

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

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Refrigeration and Air Conditioning
Critical pressure of a liquid is the pressure

Above which liquid becomes solid
Above which liquid becomes vapour
Above which liquid becomes gas
Above which liquid will remain liquid

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Refrigeration and Air Conditioning
The vapour compression refrigerator employs the following cycle

Reversed Rankine
Carnot
Rankine
Reversed Carnot

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Refrigeration and Air Conditioning
The freezing point of R-12 is

-95.2°C
-86.6°C
-107.7°C
-135.8°C

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MORE MCQ ON Refrigeration and Air Conditioning

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