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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The alignment circle is marked on the psychrometric chart at

26°C DBT and 60% RH
20°C DBT and 60% RH
26°C DBT and 50% RH
20°C DBT and 50% RH

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Refrigeration and Air Conditioning
When the temperature of the surrounding is higher than the temperature of the body, then the heat loss by convection from the body to the surrounding will be

Zero
Negative
None of the listed here
Positive

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Refrigeration and Air Conditioning
For large tonnage (more than 200 TR) air-conditioning applications, the compressor recommended is

Rotating
Screw
Reciprocating
Centrifugal

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Refrigeration and Air Conditioning
An Electrolux refrigerator is called a ___ absorption system.

Two fluids
None of the listed here
Single fluid
Three fluids

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Refrigeration and Air Conditioning
The freezing point of R-12 is

-135.8°C
-107.7°C
-95.2°C
-86.6°C

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Refrigeration and Air Conditioning
The refrigerant used in small tonnage commercial machines (hermetically sealed units) is

Sulphur dioxide
Carbon dioxide
Ammonia
R-12

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MORE MCQ ON Refrigeration and Air Conditioning

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