74) The transfer of heat from one body to another takes place only when there is a temperature difference between the bodies.
Answer is:
Yes
Related Heat Transfer Refrigeration and Air Conditioning MCQ with Answers
Answer is:
all of these
Answer is:
same as
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
Answer is:
all of these
Explanation:
In a heat exchanger with one fluid evaporating or condensing, the surface area required is least in
* parallel flow
* counter flow
* cross flow