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Process Equipment and Plant Design

Process Equipment and Plant Design
In the downcomer of a distillation column, the minimum recommended residence time is about __________ seconds.

2.5
17.5
12.5
5

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Process Equipment and Plant Design
The equivalent diameter for fluid flow through a channel of constant non-circular cross section of area 'A' is given by (where, P = perimeter of the channel in contact with the fluid)

A/P
√A
4 P/A
4 A/P

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Process Equipment and Plant Design
Baffles may be eliminated for

Large diameter tanks
Low viscosity liquids (< 200 poise)
High viscosity liquids (> 600 poise)
None of these

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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
Conical
Ellipsoidal (2 : 1)
Flat plate

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Process Equipment and Plant Design
The diameter of a propeller agitator used in agitation tank ranges from __________ percent of the tank diameter and its peripherial speed is normally 300 to 500 metres/minute.

5 to 10
40 to 50
55 to 75
15 to 30

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Process Equipment and Plant Design
Bubble cap plate column is

A differential stage contactor
A continuous contactor
A finite stage contactor
Used only for distillation, not for absorption

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