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Process Equipment and Plant Design

Process Equipment and Plant Design
In a multiple effect evaporator system having 'n' effects, the amount of water evaporated per unit surface area in approximately equal to __________ times that in a single effect.

1.5 nth
(1/n)th
nth
0.5 nth

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

Plug flow
Eddy diffusivity = 0
Laminar flow
Complete back mixing

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Process Equipment and Plant Design
Which of the following efficiencies can be greater than 100%?

Point efficiency
None of these
Overall plate efficiency
Murphree plate efficiency

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Process Equipment and Plant Design
Shell side heat transfer co-efficient in case of square pitch as compared to the triangular pitch under similar condition of fluid flow and tube size is

Less
Twice
More
Same

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

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

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Process Equipment and Plant Design
Thin spherical shells subjected to internal pressure, develop __________ stresses.

Neither A nor B
Both A & B
Circumferential
Radial

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