73) Sulphur dioxide is extremely toxic and non-flammable.

Right

Wrong

Answer is:

Right

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Related Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

74) The transfer of heat from one body to another takes place only when there is a temperature difference between the bodies.

Yes

Unknown

None

Answer is:

Yes

75) Which of the following statement is correct for ammonia as a refrigerant?

It is toxic to mucous membranes.

it requires large displacement per TR compared to fluoro carbons.

It reacts with copper and its alloys.

all of these

Answer is:

all of these

76) The wet bulb temperature at 100% relative humidity is __________ dew point temperature.

same as

lower than

higher than

none of these

Answer is:

same as

77) The use of heat exchangers is made in

radiators in automobile

condensers and boilers in steam plants

condensers and evaporators in refrigeration and air conditioning units

all of the above

Answer is:

all of the above

Explanation:

The use of heat exchangers is made in
* radiators in automobile
* condensers and boilers in steam plants
* condensers and evaporators in refrigeration and air conditioning units

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