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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The refrigeration effect in a dry evaporator compared to flooded evaporator in a similar plant is

Same
More or less depending on ambient conditions
More
Less

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Refrigeration and Air Conditioning
An infinite parallel planes with emissivities e₁ and e₂, the interchange factor for radiation from surface 1 to surface 2 is given by

e₁ + e₂
(e₁ + e₂)/ e₁ + e₂ - e₁e₂
e₁e₂
1/e₁ + 1/e₂

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

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Refrigeration and Air Conditioning
The power per tonne of refrigeration is

3.5 × C.O.P.
3.5/C.O.P.
O.P/3.5
None of these

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Refrigeration and Air Conditioning
The specific humidity during humidification process

Remains constant
Decreases
None of these
Increases

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Refrigeration and Air Conditioning
For better C.O.P of refrigerator, the pressure range corresponding to temperature in evaporator and condenser must be

Anything
Small
High
Equal

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MORE MCQ ON Refrigeration and Air Conditioning

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