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Process Equipment and Plant Design

Process Equipment and Plant Design
Scale up problem in design based on the similarity concept takes into account __________ similarity.

Dynamic
Kinematic
Geometrical
All of these

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Process Equipment and Plant Design
A perforated plate has holes of diameter dh arranged in a pitch ph. Each hole has a tube of I.D. dt passing through it. The ligament efficiency is given by

(ph - dh)/ph
(ph - dt)/ph
(ph - dh . dt/2)/ph
(ph - dh)/dh

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Process Equipment and Plant Design
In a distillation column, the minimum residence time for liquid in the downspout is about __________ seconds.

180
8
80
1

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Process Equipment and Plant Design
For turbine agitator, the impeller diameter is about

0.95 d
0.65 to 0.85 d
0.3 to 0.5 d
0.1 to 0.2 d

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Process Equipment and Plant Design
__________ heat exchanger is also known as 'hair pin type' exchanger,

Regenerative
Finned
Plate type
Double pipe

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Process Equipment and Plant Design
An increase in the liquid resistance to interphase mass transfer and a resultant reduction in plate efficiency is caused by

An increase in relatived volatility for rectification columns
All of these
Decrease in gas solubility for absorbers
An increase in liquid viscosity

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