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Process Equipment and Plant Design

Process Equipment and Plant Design
In chemical process equipments, the conical bottom heads used, usually has an apex angle of

20°
40°
60°
80°

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Process Equipment and Plant Design
The most common standard size of bubble caps used in industrial operation is

8" dia cap with 1" dia riser
1" dia cap with 0.5" dia riser
4" dia cap with 8" dia riser
6" dia cap with 4" dia riser

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

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

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Process Equipment and Plant Design
For annular flow of a fluid, the ratio of the equivalent diameter for pressure drop calculation to the equivalent diameter for heat transfer calculation is

(d1 + d2)/d2
D2/(d1 + d2)
D1/(d1 + d2)
(d1 + d2)/d1

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Process Equipment and Plant Design
Maximum acceptable total liquid gradient over a tray is about __________ mm.

12.5
5.5
45.5
30.5

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Process Equipment and Plant Design
__________ shaped roof is most commonly used for cylindrical tanks.

Dome
Cone
Umbrella
Flat

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