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Process Equipment and Plant Design

Process Equipment and Plant Design
Value of Peclet number = ∞, is the representative of

Complete back mixing
Laminar flow
Plug flow
Eddy diffusivity = 0

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Process Equipment and Plant Design
Baffles may be eliminated for

Low viscosity liquids (< 200 poise)
High viscosity liquids (> 600 poise)
None of these
Large diameter tanks

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Process Equipment and Plant Design
An adequate clearance between the tray and the shell wall of a distillation column is provided to

Drain the liquid from the tray when the unit is not in operation
None of these
Avoid back-trapping
Allow for thermal expansion and facilitate installation

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Process Equipment and Plant Design
Vertical storage vessels are never supported by __________ support.

Lug
Saddle
Skirt
Bracket

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Process Equipment and Plant Design
The minimum tray spacing in distillation column of diameter less than 3 ft is normally __________ inches.

18
24
6
34

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Process Equipment and Plant Design
Generally, as the length of the liquid path on a tray is increased beyond 5 ft, the overall column efficiency

Increases
May increase or decrease depending upon the plate spacing
Decreases
Remains same

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