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Process Equipment and Plant Design

Process Equipment and Plant Design
Overall mass transfer co-efficient in case of absorption of __________ in water is based on the gas film co-efficient only, as the mass transfer process is gas film (phase) controlling.

SO₂
None of these
CO₂
NH₃

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Process Equipment and Plant Design
Pressure differential maintained across a continuous rotary vacuum filter is in the range of __________ mm Hg column.

250 to 500
100 to 150
50 to 100
600 to 700

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Process Equipment and Plant Design
The length of straight rectangular weir used on cross-flow trays is generally __________ the column diameter.

2 ft irrespective of (for column > 3 ft diameter)
0.6-0.8 times
Twice
Equal to

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Process Equipment and Plant Design
The average velocity in the tubes of a 1-4 heat exchanger is __________ times that in 1-1 heat exchanger having the same size & number of tubes and operated at same liquid flow rate.

2
4
43834
43832

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Process Equipment and Plant Design
In case of a shell and tube heat exchanger, the minimum shell thickness for carbon steel (inclusive of corrosion allowance) depends on shell diameter and is in the range of __________ mm.

44183
44058
43895
43962

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Process Equipment and Plant Design
Which of the following packing materials provides for maximum mass transfer?

Cross-partition rings
All of these
Raschig rings
Lessig rings

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