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Process Equipment and Plant Design

Process Equipment and Plant Design
Heat transfer co-efficient for a horizontal condenser as compared to a vertical condenser operating under similar conditions is

About 3 times
About 0.33 times
Less
Same

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Process Equipment and Plant Design
Le/D for a Tee (used as elbow, entering branch) would be

Around 90
Less than that for Tee (used as elbow, entering run)
More than that for Tee (used as elbow, entering run)
Both B and C

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Process Equipment and Plant Design
In a multipass shell and tube heat exchanger, the problem of differential expansion between the shell and tube passes is taken care of by using a

U-bend
Floating head tube sheet
Either A or B
Neither A nor B

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Process Equipment and Plant Design
Back-trapping in a distillation column results due to

Low gas velocity
Low reflux ratio
High gas velocity
Excessive liquid gradient over the tray

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Process Equipment and Plant Design
In packed absorption tower, onset of flooding usually occurs at a pressure drop of about __________ mm of water column per metre height of packing.

750-1000
50-75
200-250
25-50

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Process Equipment and Plant Design
The minimum plate spacing in most of the pertroleum refinery distillation columns (of dia > 3 ft) is normally __________ inches.

6
18
12
34

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