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Process Equipment and Plant Design

Process Equipment and Plant Design
Diameter of bubble caps used in high pressure columns is __________ as compared to that used in identical vacuum columns.

More
Same
Less
Either A or B; no generalisation can be made

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Process Equipment and Plant Design
Which of the following packing materials provides for maximum mass transfer?

Cross-partition rings
Lessig rings
All of these
Raschig rings

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Process Equipment and Plant Design
Normally, the length to diameter ratio of rotary dryers varies form 4 to 10 and for its economic operation, the number of transfer units (NTU) for such dryers varies from

1.5-2.5
7.5-10.0
3.5-5.5
44119

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Process Equipment and Plant Design
The ratio for the rate of washing to the final rate of filtration in a washing type of plate and frame filter is

0.75
0.25
1.25
0.5

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Process Equipment and Plant Design
Where does the maximum tensile strength occur in a thick cylindrical vessel subjected to internal pressure?

None of these
At the inner surface
At the mid thickness of the cylindrical wall
At the outer surface

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Process Equipment and Plant Design
In case of a continuous distillation column, increase in reflux ratio may result in the

Lower fixed charges for the column
Greater cost for the condenser coolant
All of these
Greater cost for the reboiler heat supply

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