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Process Equipment and Plant Design

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
43962
44058
44183

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Process Equipment and Plant Design
A claming section before the liquid flows into the downcomer is privided to

Reduce the discharge fluctuation
Permit release of entrained vapour in the liquid
Ensure better vapour-liquid contact
Cool the liquid before it flows down

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Process Equipment and Plant Design
In packed absorption tower, onset of flooding usually occurs at a pressure drop of about __________ mm of water column per metre height of packing.

750-1000
25-50
200-250
50-75

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Process Equipment and Plant Design
In actual operation of distillation column, the vapour is not distributed uniformly among the bubble caps, primarily because of the

Small downcomer liquid seal
Lower skirt clearance
Lower static submergence
Liquid gradient on the tray

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Process Equipment and Plant Design
Value of Peclet number = ∞, is the representative of

Complete back mixing
Laminar flow
Plug flow
Eddy diffusivity = 0

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Process Equipment and Plant Design
For a cylinderical internally pressurised vessel, which of the following closure types would withstand highest pressure, if each closure is of the same material and thickness?

Hemispherical
Flat plate
Conical
Ellipsoidal (2 : 1)

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