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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The unit of thermal diffusivity is

m/hK
m²/hK
m²/h
m/h

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

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Refrigeration and Air Conditioning
Mass flow ratio of NH₃ in comparison to Freon-12 for same refrigeration load and same temperature limits is of the order of

1: 3
1: 9
1: 1
9: 1

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Refrigeration and Air Conditioning
In a vapour compression system, the condition of refrigerant is dry saturated vapour

Before entering the condenser
Before entering the compressor
After leaving the condenser
After leaving the compressor

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Refrigeration and Air Conditioning
For unsaturated air, the dew point temperature is __________ wet bulb temperature.

More than
Less than
Equal to
None of these

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Refrigeration and Air Conditioning
The specific humidity during heating and humidification process.

Remains constant
Increases
Decreases
None of these

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MORE MCQ ON Refrigeration and Air Conditioning

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