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Process Equipment and Plant Design

Process Equipment and Plant Design
In a cylinderical vessel subjected to internal pressure, the longitudinal stress σL and the circumferential stress, σh are related by

σh = 2 σL
No relation exists
σh = σL/2
σh = σL

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Process Equipment and Plant Design
In a distillation column, minimum clearance to be maintained betweeen the overflow weir and the last row of the bubble caps is __________ cms.

15
2.5
20
7.5

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Process Equipment and Plant Design
The distance between the top of the slots and the liquid surface when the static liquid is just ready to flow over the overflow weir is called

Downcomer liquid seal
None of these
Skirt clearance
Static submergence

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

80
8
180
1

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Process Equipment and Plant Design
In case of a shell and tube heat exchanger, the minimum shell thickness for carbon steel (inclusive of corrosion allowance) depends on shell diameter and is in the range of __________ mm.

43895
44058
44183
43962

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Process Equipment and Plant Design
Which of the following factors determine the amount of entrainment in a distillation column?

Plate spacing
Depth of liquid above the bubble cap slots
All of these
Vapour velocity in the volume between the plates

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