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Process Equipment and Plant Design

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

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

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Process Equipment and Plant Design
What is the slope of the operating line in the rectifying section of a distillation coloumn?

> 1
∞

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Process Equipment and Plant Design
Typical static submergence for bubble cap plate column operating at atmospheric pressure may be around

2.5"
5"
50% of the plate spacing
0.5"

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Process Equipment and Plant Design
Welded joint efficiency in the design of chemical process equipment is taken as

0.85
0.55
0.95
0.75

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Process Equipment and Plant Design
Stage efficiency for packed tower varies with the

Type & size of packing
Fluid rates and fluid properties
Operating pressure and column diameter
All of these

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Process Equipment and Plant Design
Normally, the length to diameter ratio of rotary dryers varies form 4 to 10 and for its economic operation, the number of transfer units (NTU) for such dryers varies from

1.5-2.5
7.5-10.0
44119
3.5-5.5

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