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Chemical Engineering - Heat Transfer

Exercise : Heat Transfer - Section 4
11.
Which of the following is correct ?
Rate = Driving force x Resistance
Driving force = Rate x Resistance
Resistance = Driving force x Rate
Rate = Resistance/Driving force
Answer: Option
Explanation:
No answer description is available. Let's discuss.
12.
Convective heat transfer, in which heat is transferred by movement of warmed matter is described by
Fourier's law
Newton's law of cooling
Fick's law
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
13.
As the difference between the wall temperature and bulk temperature increases, the boiling heat transfer co-efficient
continues to increase.
continues to decrease.
goes through a minimum.
goes through a maximum.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
14.
Heat transfer rate per unit area is called
thermal conductivity
heat flux
heat transfer co-efficient
thermal diffusivity
Answer: Option
Explanation:
No answer description is available. Let's discuss.
15.
Log mean temperature difference (LMTD) cannot be used, if
heat transfer co-efficient over the entire heat exchanger is not constant.
there exists an unsteady state.
the heat capacity is not constant and there is a phase change.
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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