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Process Equipment and Plant Design

Process Equipment and Plant Design
In a distillation column, the minimum residence time for liquid in the downspout is about __________ seconds.

180
80
1
8

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Process Equipment and Plant Design
In actual operation of a bubble cap distillation tower, the __________ at the bottom of the tower is more than that at the top of the tower.

Pressure and temperature
All of these
Molal flow rate of vapour
Vapour molecular weight

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

200
350
5
60

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Process Equipment and Plant Design
Rivets are generally specified by the

Overall length
Shank diameter
None of these
Head diameter

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Process Equipment and Plant Design
__________ of water makes it a widely used coolant in heat exchangers.

High specific heat
Low dirt factor
Low viscosity
Low corrosiveness

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Process Equipment and Plant Design
To avoid the tearing off the plate of an edge, the margin (i.e., the minimum distance from the centre of the rivet hole to the nearest edge of the plate) should be equal to

D
2.5 d
0.5 d
1.5 d

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