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Process Equipment and Plant Design

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

80
180
8
1

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Process Equipment and Plant Design
Which of the following lengths of heat exchanger tubes are normally not used in practice?

2.5 metres
10 metres
6 metres
0.5 metre

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Process Equipment and Plant Design
In case of a 'thin' pressure vessel, the ratio of its diameter to wall thickness is

30
> 10
> 20
< 10

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Process Equipment and Plant Design
In case of saddle packing (e.g., berl and intralox saddles), the maximum size of the packing should not exceed __________ of the column diameter.

l/15th
l/50th
l/30th
l/5th

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Process Equipment and Plant Design
Shell side heat transfer co-efficient in case of square pitch as compared to the triangular pitch under similar condition of fluid flow and tube size is

Same
More
Twice
Less

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Process Equipment and Plant Design
Thin spherical shells subjected to internal pressure, develop __________ stresses.

Both A & B
Radial
Circumferential
Neither A nor B

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