Heat Transfer MCQs
Practice free Heat Transfer multiple-choice questions with instant answer feedback and step-by-step solutions. Click an option to check yourself, reveal the full explanation, and work through all 576 questions — no login required.
Question 28hard
Heat flux increases with temperature drop beyond the Leiden frost point in the plot of heat flux vs. temperature drop for a boiling liquid, because
Question 29hard
For a laminar flow of fluid in a circular tube, 'h1' is the convective heat transfer co-efficient at velocity 'V1'. If the velocity is reduced by half and assuming the fluid properties are constant, the new convective heat transfer co-efficient is
Question 30hard
If h1 = inner film co-efficient and /h2 = outer film co-efficient, then the overall heat transfer co-efficient is
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Question 31hard
The unit of heat transfer co-efficient is
Question 32hard
If average heat transfer co-efficient is $${{\text{h}}_{\text{a}}}$$ and the local coefficient at the end of the plate is $${{\text{h}}_l}$$ then in case of heat transfer to a fluid flowing over a flat plate, heated over its entire length
Question 33hard
At Pr > 1, conduction in an ordinary fluid flowing through a heated pipe is limited to the
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Question 34medium
When vaporisation takes place directly at the heating surface, it is called
Question 35medium
Which is the most suitable for the con-certration of highly concentrated solution?
Question 36medium
View factor is important in heat transfer by