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Chemical Engineering - Heat Transfer

Exercise : Heat Transfer - Section 5
26.
The heat flux in the nucleate boiling regimes is proportional to (where, ΔT = excess temperature)
(ΔT)2
(ΔT)4
(ΔT)3
(ΔT)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
27.
In a 1-1 cocurrent heat exchanger, if the tube side fluid outlet temperature is equal to the shell side fluid outlet temperature, then the LMTD is
∞
0
equal to the difference between hot and cold fluids inlet temperature.
equal to the difference between hot fluid inlet temperature and cold fluid outlet temperature.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
28.
A body is called grey if the monochromatic emissivity of the body is
zero
unity
same for all wavelengths
different for all wavelengths
Answer: Option
Explanation:
No answer description is available. Let's discuss.
29.
In an extended surface heat exchanger, fluid having lower co-efficient
flows through the tube.
flows outside the tubes.
can flow either inside or outside the tubes.
should not be used as it gives very high pressure drop.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
30.
In a shell and tube heat exchanger, the tube side heat transfer co-efficient just at the entrance of the tube is
infinity.
zero.
same as average heat transfer co-efficient for tube side.
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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