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Process Equipment and Plant Design

Process Equipment and Plant Design
In a distillation column, the minimum residence time for liquid in the downspout is about __________ seconds.

180
8
1
80

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

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Process Equipment and Plant Design
Speed of the drum of the rotary vacuum filter normally ranges from __________ rpm.

8 to 15
5 to 7
3 to 8
0.1 to 2

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Process Equipment and Plant Design
The buckling tendency of compression members is always in the direction of the

Axis of the load
Perpendicular to the axis of the load
None of these
Least radius of gyration

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Process Equipment and Plant Design
In case of plain carbon steel, butt welded joints are used for shell plate thickness ≤ __________ cms. .

6.8
3.8
0.5
1.2

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Process Equipment and Plant Design
A shell may by termed as thin if its thickness to diameter ratio is less than 0.1. The factor which can be neglected in the calculation of membrane stresses is

Elongation
Deformation
Shear
Bending

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