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Process Equipment and Plant Design

Process Equipment and Plant Design
__________ liquor is best handled in a long tube vertical evaporator.

Viscous
Foamy
Scaling
Salting

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Process Equipment and Plant Design
Back-trapping in a distillation column results due to

Low reflux ratio
Excessive liquid gradient over the tray
High gas velocity
Low gas velocity

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Process Equipment and Plant Design
Where does the maximum tensile strength occur in a thick cylindrical vessel subjected to internal pressure?

At the outer surface
At the inner surface
At the mid thickness of the cylindrical wall
None of these

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Process Equipment and Plant Design
In perforated plate towers, the

Pressure drop is less compared is similar bubble cap towers
All of these
Total hole area may be around 6 to 15% of tower cross-sectional area
Hole sizes may be around 1/8" or 3/16"

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Process Equipment and Plant Design
The dust collection efficiency of a cyclone separator

Decreases with increase in gas flow rate
None of these
Is inversely proportional to the mass of the dust particle
Is directly proportional to the radius of the dust particle path

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Process Equipment and Plant Design
Lessing ring is formed by the addition of a partition across the centre of a raschig ring, which results in an area increase of about __________ percent.

55
5
35
20

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