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Process Equipment and Plant Design

Process Equipment and Plant Design
Which of the following packing materials provides for maximum mass transfer?

Cross-partition rings
Raschig rings
Lessig rings
All of these

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Process Equipment and Plant Design
The wall thickness of thin cylindrical shell with hemispherical ends is __________ that of the spherical ends.

Less than
More than
Either B or C; depends on maximum permissible internal pressure
Equal to

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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
Smaller reactor should come first
None of these
Larger reactor should come first

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Process Equipment and Plant Design
Saddle supports are used for supporting __________ vessels.

Horizontal cylinderical
Thick walled vertical
Thick spherical
Tall vertical

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Process Equipment and Plant Design
Pressure drop per tray in the atmospheric distillation column is about __________ psi.

43833
0.5 - 1.0
0.07 - 0.12
0.01 - 0.5

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Process Equipment and Plant Design
In a shell and tube heat exchanger, the overall heat transfer co-efficient is proportional to the tube side (volumetric flow rate)0.8. This is valid, only when the ratio of the tube side film resistance to the total resistance is almost equal to

2
20.8
1
∞

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