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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

Entrainment considerations
None of these
Vapour density
Diameter of the column

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Process Equipment and Plant Design
Floating head heat exchangers are used for the

Heat transfer between corrosive fluids
Counter-current heat transfer systems
Co-current heat transfer systems
Cases where temperature difference between the shell and the tubes is more (>50°C)

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Process Equipment and Plant Design
The retention time of material in a rotary dryer depends upon its

Slope & length
Flights arrangement
All of these
Rpm

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Process Equipment and Plant Design
Fouling factor must be included in the calculation of over all design heat transfer coefficient, when the liquid

Is of high specific gravity
Is highly viscous
Containing suspended solids flows at low velocity
Containing suspended solids flows at high velocity

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

Scaling
Salting
Viscous
Foamy

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

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

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