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Chemical Engineering - Heat Transfer

Exercise : Heat Transfer - Section 2
6.
Which one gives the monochromatic emissive power for black body radiation ?
Planck's law
Kirchhoffs law
Wien's law
Stefan-Boltzman law
Answer: Option
Explanation:
No answer description is available. Let's discuss.
7.
For what value of Prandtl number, St = f/2?
1.5
1
> 1
< 1
Answer: Option
Explanation:
No answer description is available. Let's discuss.
8.
In a shell and tube heat exchanger,
the temperature drops in the two fluids and the wall are proportional to individual resistances.
the temperature drop is inversely proportional to the resistance across which the drop occurs.
there is no relationship between temperature drop and resistance.
the relationship is not generalised.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
9.
Dietus-Boelter equation used for the determination of heat transfer co-efficient is valid
for fluids in laminar flow.
for fluids in tubulent flow.
when Grashhoff number is very important.
for liquid metals.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
10.
The equation, , corrosponds to __________ analogy.
Von-Karmann
Reynolds
Colburn
Prandtl
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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