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Process Equipment and Plant Design

Process Equipment and Plant Design
The minimum baffle height should be

Equal to the impeller diameter
3/4 of the tank height
Twice the impeller diameter
Twice the tank diameter

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Process Equipment and Plant Design
In packed towers provided with pall rings liquid redistributors are positioned at heights of every 6 metres or 5-10 times the column diameter, whichever is less. Maximum size of the pall rings should not exceed __________ of the column diameter.

1/5-1/10th
1/20-1/30th
1/10-1/15th
1/2 to 1/4th

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Process Equipment and Plant Design
What is the slope of the operating line in the stripping section of a distillation column?

?
< 1
> 1

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Process Equipment and Plant Design
Le/D for a Tee (used as elbow, entering branch) would be

Around 90
Less than that for Tee (used as elbow, entering run)
Both B and C
More than that for Tee (used as elbow, entering run)

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Process Equipment and Plant Design
In actual operation of a bubble cap distillation tower, the __________ at the bottom of the tower is more than that at the top of the tower.

Vapour molecular weight
Pressure and temperature
Molal flow rate of vapour
All of these

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

All of these
Flights arrangement
Rpm
Slope & length

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