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Process Equipment and Plant Design

Process Equipment and Plant Design
Maximum allowable vapour velocity in a bubble cap tower is determined by the

None of these
Vapour density
Entrainment considerations
Diameter of the column

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

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Process Equipment and Plant Design
__________ of water makes it a widely used coolant in heat exchangers.

Low corrosiveness
Low viscosity
Low dirt factor
High specific heat

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Process Equipment and Plant Design
Le/D for 90° elbow (medium radius) and 90°square elbow would be respectively around

250 and 600
25 and 60
3 and 5
100 and 250

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

Salting
Scaling
Foamy
Viscous

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Process Equipment and Plant Design
The thickness of segmental baffles (25 -35% cut truncated plates usually) is generally __________ the tube wall thickness.

Twice
Equal to
Four times
Half

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