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Process Equipment and Plant Design

Process Equipment and Plant Design
Overall mass transfer co-efficient in case of absorption of __________ in water is based on the gas film co-efficient only, as the mass transfer process is gas film (phase) controlling.

NH₃
SO₂
CO₂
None of these

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Process Equipment and Plant Design
The minimum tray spacing in distillation column of diameter less than 3 ft is normally __________ inches.

24
34
18
6

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

?
> 1
< 1

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

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

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Process Equipment and Plant Design
The ends of a cylinderical vessel can be closed by a head, which can be one of the four shapes. For the same thickness, choose the one which can withstand the highest pressure.

Ellipsoidal
Hemispherical
Flat plate
Torispherical

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Process Equipment and Plant Design
Bracket supports are the most suitable for supporting __________ vessels.

Thin shperical (e.g. Horton sphere)
Thick walled vertical
Horizontal
None of these

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