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Process Equipment and Plant Design

Process Equipment and Plant Design
In a continuous distillation column, the optimum reflux ratio ranges from __________ times the minimum reflux ratio.

1.1 to 1.5
1.6 to 2
2.2 to 2.6
2.7 to 3

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

Laminar flow
Complete back mixing
Plug flow
Eddy diffusivity = 0

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Process Equipment and Plant Design
Factor of safety (i.e., overdesign factor) in heat transfer equipments is about __________ percent more than the actual/theoretical design factor.

30-35
35-40
43961
15-20

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Process Equipment and Plant Design
Bubble cap diameter used for the distillation column having diameter ranging from 1.5 to 4.5 metres is about __________ mm.

100
50
10
150

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Process Equipment and Plant Design
Bracket supports are the most suitable for supporting __________ vessels.

Horizontal
Thick walled vertical
Thin shperical (e.g. Horton sphere)
None of these

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Process Equipment and Plant Design
Optimum reflux ratio in a continuous distillation column is determined by the

Maximum permissible vapour velocity
Flooding limit of the column
Total cost consideration (fixed cost of the column plus the cooling water & steam cost)
None of these

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