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Process Equipment and Plant Design

Process Equipment and Plant Design
Le/D for fully open globe value may be around

75
25
10
300

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Process Equipment and Plant Design
Liquid gradient over the tray results due to the

Low gas velocity
Resistance offered to flow of liquids by caps & risers and the flow of gas
Large plate spacing
Large reflux ratio

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Process Equipment and Plant Design
The thickness of heat transfer plates used in the plate type heat exchanger ranges from __________ mm, pressed in a single piece provided with grooves & corrugations.

44055
0.3 to 0.8
3.5 to 7.0
1.25 to 3.125

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Process Equipment and Plant Design
__________ closure is the weakest enclosure for cylindrical vessels.

Torispherical
Elliptical
Hemispherical
Conical or flat plate

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Process Equipment and Plant Design
Which of the following material is seldom used for pressure vessel construction?

Rimmed still
Mild steel
Killed steel
Semi-killed steel

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Process Equipment and Plant Design
The slope of the feed line in distillation opeartion is given by (where, q = fraction of the feed stream that is liquid.)

-q/(q-1)
None of these
-q/(1-q)
-q

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