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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Ammonia is

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

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Refrigeration and Air Conditioning
In refrigerator, liquid receiver is required between condenser and flow controlling device, if quantity of refrigerant for system is

More than 10 kg
More than or equal to 3.65 kg
Less than 2 kg
There is no such consideration

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

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Refrigeration and Air Conditioning
The C.O.P. of a Carnot refrigerator in winter will be _________ as compared to C.O.P. in summer.

Lower
Same
Higher
None of these

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Refrigeration and Air Conditioning
The dehumidification process, on the psychrometric chart, is shown by

Horizontal line
Vertical line
Curved line
Inclined line

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Refrigeration and Air Conditioning
Air conditioning means

All of these
Cooling
Dehumidifying
Heating

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MORE MCQ ON Refrigeration and Air Conditioning

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