In packed towers provided with pall rings liquid redistributors are positioned at heights of every 6 metres or 5 - 10 times the column diameter, whichever is less. Maximum size of the pall rings should not exceed __________ of the column diameter.
A. $$\frac{1}{{10}}\,{\text{to }}{\frac{1}{{15}}^{{\text{th}}}}$$
B. $$\frac{1}{5}\,{\text{to }}{\frac{1}{{10}}^{{\text{th}}}}$$
C. $$\frac{1}{{20}}\,{\text{to }}{\frac{1}{{30}}^{{\text{th}}}}$$
D. $$\frac{1}{2}\,{\text{to }}{\frac{1}{4}^{{\text{th}}}}$$
Answer: Option A
This Question Belongs to Chemical Engineering >> Process Equipment And Plant Design
Width and depth of grooves in the tube sheet holes normally are __________ inch respectively.
A. $$\frac{1}{8}$$ and $$\frac{1}{{64}}$$
B. $$\frac{1}{{64}}$$ and $$\frac{1}{8}$$
C. $$\frac{1}{2}$$ and 8
D. $$\frac{1}{2}$$ and 5
A. Less than
B. 1.25-1.50 times
C. 2.5 times
D. One-fourth of
Value of Peclet number = 0, is the representative of
A. Laminar flow
B. Complete back mixing
C. Plug flow
D. Eddy diffusivity = 0
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