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Process Equipment and Plant Design

Process Equipment and Plant Design
Reflux ratio variation in a distillation column is between

Minimum and infinity
None of these
Zero and infinity
Zero and one

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Process Equipment and Plant Design
Baffles are provided in a shell and tube heat exchanger to increase the turbulence and velocity of the shell side fluid. Which of the following shaped baffles does not fall in the category of transverse baffle?

Helical type baffle
Disk type baffle
Segmental baffle
Flat plate extending across the wall

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Process Equipment and Plant Design
Wind load consideration in the design of a support can be neglected, when the vessel is

Tall (say 30 metres), but is full of liquid
None of these
Short (< 2 m) and housed indoor
Tall but empty

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

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Process Equipment and Plant Design
A perforated plate has holes of diameter dh arranged in a pitch ph. Each hole has a tube of I.D. dt passing through it. The ligament efficiency is given by

(ph - dh)/ph
(ph - dh . dt/2)/ph
(ph - dh)/dh
(ph - dt)/ph

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Process Equipment and Plant Design
The necessary wall thickness for a metallic storage vessel is a function of the

Diameter of the vessel
All of these
Ultimate tensile strength (or yield point) of the material and operating temperature
Operating pressure and welding/joint efficiency

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