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Process Equipment and Plant Design

Process Equipment and Plant Design
Le/D for fully open globe value may be around

75
300
10
25

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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

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

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Process Equipment and Plant Design
The average velocity in the tubes of a 1-4 heat exchanger is __________ times that in 1-1 heat exchanger having the same size & number of tubes and operated at same liquid flow rate.

43834
43832
4
2

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Process Equipment and Plant Design
Theoretically calculated diameter of the stripping section of the continuous rectification column is __________ that of the enriching section.

Less than
Same as
Either more or less (depending upon relative volatility)
More than

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Process Equipment and Plant Design
The minimum shell thickness for tank ≤ 15 metres diameter is limited to __________ mm, for reasons of elastic stability.

2
10
15
5

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Process Equipment and Plant Design
Circumferential (hoop) stress in a thin cylindrical vessel under internal pressure is __________ the longitudinal stress.

Half
Eight times
Equal to
Twice

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