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Process Equipment and Plant Design

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

Complete back mixing
Eddy diffusivity = 0
Plug flow
Laminar flow

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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

7.5-10.0
1.5-2.5
3.5-5.5
44119

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Process Equipment and Plant Design
In a multipass shell and tube heat exchanger, the problem of differential expansion between the shell and tube passes is taken care of by using a

Neither A nor B
Floating head tube sheet
Either A or B
U-bend

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Process Equipment and Plant Design
For a cylinderical vessel of moderate height, the weld joint efficiency for joints parallel to the cylinderical axis is given as 1.0, while for joints along the girth (circumference) it is given as 0.8. In calculating the shell wall thickness using code formula for an internally pressurised cylinderical vessel, what value of weld joint efficiency should be used?

0.8
1
(0.8)0.5
0.9

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Process Equipment and Plant Design
In a __________ rivetted joint, the number of rivets decreases from the innermost row to the outermost row.

Chain
None of these
Zig-zag
Diamond

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Process Equipment and Plant Design
In a distillation column, bubble caps are located on trays with a pitch of __________ times the outside diameter of the caps.

1.5 to 3
1.3 to 2
1.6 to 2
2.5

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