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Chemical Engineering - Heat Transfer

Exercise : Heat Transfer - Section 8
31.
Nucleate boiling is promoted
on polished surfaces
on rough surfaces
in the absence of agitation
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
32.
In forced circulation, the heating element is injected
internally
externally
both (a) and (a)
neither (a) nor (b)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
33.
If all the conditions and dimensions are same, then the ratio of velocity through the tubes of a double pass heat exchanger to that through the single pass heat exchanger is
1
2
1/2
4
Answer: Option
Explanation:
No answer description is available. Let's discuss.
34.
The equation, Nst = f/2, is the __________ analogy.
Colburn
Reynolds
Prandtl
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
35.
Boiling point elevation for a strong and concentrated solution is found by Duhring's rule, which states that at the same pressure, the boiling point of a solution is a linear function of the __________ of pure water.
boiling point
dynamic viscosity
kinematic viscosity
density
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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