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Process Equipment and Plant Design

Process Equipment and Plant Design
In most of the shell and tube heat exchangers, the tube pitch is generally __________ the tube diameter.

One-fourth of
2.5 times
1.25-1.50 times
Less than

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Process Equipment and Plant Design
The optimum size ratio for two mixed reactors in series depends on the kinetics of the reaction and the conversion level. For reaction orders more than one, the

Equal sized reactors are the best
Larger reactor should come first
Smaller reactor should come first
None of these

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Process Equipment and Plant Design
Le/D for 90° elbow (medium radius) and 90°square elbow would be respectively around

250 and 600
25 and 60
3 and 5
100 and 250

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Process Equipment and Plant Design
Shortest distance between two tubes is

None of these
Called tube clearance
Called tube pitch
More in case of triangular pitch as compared to square pitch of tube layout

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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
180
80
8

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Process Equipment and Plant Design
A/an __________ is used for changing the direction of a pipeline.

Disc compensator
Elbow
Flange
Union

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