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Process Equipment and Plant Design

Process Equipment and Plant Design
Larger depth of liquid on the trays of a distillation column

Neither A nor B
Both A & B
Leads to high tray efficiency
Results in higher pressure drop per tray

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Process Equipment and Plant Design
A perforated plate has holes of diameter dh arranged in a pitch ph. Each hole has a tube of I.D. dt passing through it. The ligament efficiency is given by

(ph - dh . dt/2)/ph
(ph - dh)/ph
(ph - dt)/ph
(ph - dh)/dh

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Process Equipment and Plant Design
Skirt support is the most suitable for supporting __________ vessels.

Tall vertical
Thick walled
Small horizontal
Large horizontal

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Process Equipment and Plant Design
Liquid redistribution should be done in a packed tower packed with raschig rings every 6 metres or __________ times the column diameter, whichever is lower.

5-7.5
2.5-3.0
15-20
10-12.5

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Process Equipment and Plant Design
Joint efficiency (J) for a seamless pipe is

1
< 0.5
1.2
0.85

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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.

3.5 to 7.0
44055
0.3 to 0.8
1.25 to 3.125

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