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Process Equipment and Plant Design

Process Equipment and Plant Design
__________ is the determining factor for the number of bubble caps to be used per tray.

Tray diameter
Vapor load
Liquid load
Permissible slot velocity

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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?

0.9
(0.8)0.5
1
0.8

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Process Equipment and Plant Design
The difficulty of liquid distribution in packed towers is accentuated, when the ratio of tower diameter to packing diameter is

< 7
> 7 < 15
> 20 < 50
< 30

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Process Equipment and Plant Design
In case of bubble cap distillation column of diameter greater than 1.2 metres, the cap diameter is roughly about __________ cms.

35
20
10
30

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

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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.

1
8
180
80

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