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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The evaporator used in household refrigerators is

Frosting evaporator
None of these
Defrosting evaporator
Non-frosting evaporator

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Refrigeration and Air Conditioning
Which of the following statement is correct for ammonia as a refrigerant?

It is toxic to mucous membranes.
It reacts with copper and its alloys.
All of these
It requires large displacement per TR compared to fluoro carbons.

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Refrigeration and Air Conditioning
A bootstrap air cooling system has

Two heat exchangers
Four heat exchangers
Three heat exchangers
One heat exchanger

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Refrigeration and Air Conditioning
Most thermostatic expansion valves are set for a superheat of

20°C
15°C
5°C
10°C

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Refrigeration and Air Conditioning
The boiling point of ammonia is

-30°C
-10.5°C
-33.3°C
-77.7°C

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Refrigeration and Air Conditioning
The leakage in a refrigeration system using ammonia is detected by

All of these
Sulphur sticks
Halide torch
Soap and water

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MORE MCQ ON Refrigeration and Air Conditioning

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