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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
In chemical dehumidification process,

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

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Refrigeration and Air Conditioning
The dry bulb temperature lines, on the psychrometric chart are

Horizontal and non-uniformly spaced
Vertical and uniformly spaced
Curved lines
Horizontal and uniformly spaced

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Refrigeration and Air Conditioning
Reducing suction pressure in refrigeration cycle

Lowers compressor capacity because vapour is lighter
Lowers evaporation temperature
Increases power required per ton of refrigeration
All of these

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Refrigeration and Air Conditioning
The C.O.P. of a refrigerator working on a reversed Carnot cycle is (where T₁ = Lowest absolute temperature, and T₂ = Highest absolute temperature)

T₁ / (T₂ - T₁)
(T₂ - T₁)/T₁
T₂/ (T₂ - T₁)
(T₁ - T₂)/T₁

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

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Refrigeration and Air Conditioning
Ammonia is

Non-toxic
Non-inflammable
Highly toxic and inflammable
Toxic and non-inflammable

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MORE MCQ ON Refrigeration and Air Conditioning

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