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Process Equipment and Plant Design

Process Equipment and Plant Design
The maximum liquid gradient over a tray must not exceed

2"-3.5"
Half the tray spacing
5"
0.5" -1.25"

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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
Segmental baffle
Flat plate extending across the wall
Disk type baffle

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Process Equipment and Plant Design
Optimum reflux ratio in a continuous distillation column is determined by the

Maximum permissible vapour velocity
None of these
Total cost consideration (fixed cost of the column plus the cooling water & steam cost)
Flooding limit of the column

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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
> 20
> 10
< 10

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Process Equipment and Plant Design
Le/D for fully open gate valves would be

Around 7
Much more than that for fully open globe valves
Both B and C
Much less (say 2% than that for fully open globe valves)

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Process Equipment and Plant Design
Filtration rate is affected by the

Pressure drop across the cake & filter medium
Cake & filter medium resistance
All of these
Area of filtering surface & the viscosity of filtrate

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