Related Questions

In a moderately sized packed absorption tower, channeling (which is most severe with stacked packings) can be minimised by taking the ratio of tower diameter to packing diameter
A > 4 :1
B > 8:1
Smaller sized packings are generally dumped to the packed columns, and the large ones of size greater than __________ mm are stacked individually, which provides better control over bed porosity and offers lower gas pressure drop.
A 25
B 50
C 75
D 150
In case of saddle packing (e.g., berl and intralox saddles), the maximum size of the packing should not exceed __________ of the column diameter.
A $${\frac{1}{5}^{{\text{th}}}}$$
B $${\frac{1}{{15}}^{{\text{th}}}}$$
C $${\frac{1}{{30}}^{{\text{th}}}}$$
D $${\frac{1}{{50}}^{{\text{th}}}}$$
In an absorption coloumn, the flooding velocity for random packing is __________ that for stacked/regular packing.
A Greater than
B Smaller than
C Equal to
D Either A, or B ; depends on the type of packing
Stacked packing compared to dumped packing
A Provides poorer contact between the fluids
B Gives lower pressure drop
C Both A & B
D Gives higher pressure drop
Co-current absorbers are usually used when the gas to be dissolved in the liquid is
A Sparingly soluble
B Highly soluble
C A pure substance
D A mixture
For absorbers, high pressure drop results in
A Increased efficiency
B Decreased efficiency
C High operating cost
D Better gas liquid contact
Which of the following is not fixed by the process requirements, in the design of absorbers?
A Flow rate of the entering gas
B Composition of the entering liquid
C Terminal concentrations of gas stream
D None of these
The most common packing used in industrial operations is __________ rings.
A Raschig
B Lessing
C Cross-partition
D Single spiral
ভাসমান কোন Selection কে অন্য স্থানে সরিয়ে নেওয়া যাবে যখন Selection এর ভিতরে- 
A বর্গাকার আইকন দেখা যাবে
B আয়তাকার আইকন দেখা যাবে
C ত্রিকোণাকার আইকন দেখা যাবে
D গোলাকার আইকন দেখা যাবে

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