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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Carbon dioxide is

Non-flammable
All of the listed here
Odourless
Colourless

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

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Refrigeration and Air Conditioning
The formation of frost on cooling coils in a refrigerator

Increases power consumption
Reduces power consumption
Increases heat transfer
Improves C.O.P. of the system

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Refrigeration and Air Conditioning
During cooling and dehumidification, dry bulb temperature

Remains constant
Decreases
Increases
None of these

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Refrigeration and Air Conditioning
The vapour pressure of refrigerant should be

Lower than atmospheric pressure
Higher than atmospheric pressure
Could be anything
Equal to atmospheric pressure

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Refrigeration and Air Conditioning
A refrigerant compressor is used to

Raise the temperature of the refrigerant
All of these
Circulate the refrigerant through the refrigerating system
Raise the pressure of the refrigerant

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MORE MCQ ON Refrigeration and Air Conditioning

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