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Chemical Engineering - Heat Transfer

Exercise : Heat Transfer - Section 4
26.
If Prandtl number is greater than the Schmidt number, then the
thermal boundary layer lies inside the concentration boundary layer.
concentration boundary layer lies inside the thermal boundary layer.
thermal & concentration boundary layers are of equal thickness.
hydrodynamic(i.e., momentum)boundary layer is thicker than the other two.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
27.
Which of the following accessories is provided in the vapor line of an evaporator for removing the entrained liquid ?
Bleed point
Vent
Catchall
Baffle
Answer: Option
Explanation:
No answer description is available. Let's discuss.
28.
Rate of heat transfer by vaporisation from pools of water is affected by the
nature of heating surface and distribution of bubbles.
surface tension of water.
viscosity of water.
all (a), (b) and (c).
Answer: Option
Explanation:
No answer description is available. Let's discuss.
29.
Multiple effect evaporators are commonly used in the manufacture of
P. Paper Q. Superphosphate
R. Sugar S. Fats
P and Q
P and R
P and S
R and S
Answer: Option
Explanation:
No answer description is available. Let's discuss.
30.
Which of the following has the highest thermal conductivity ?
Brick
Air
Water
Silver
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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