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Process Equipment and Plant Design

Process Equipment and Plant Design
The normal range of velocity of steam in pipes is __________ m/sec.

80-100
10-20
1-5
0.1-0.5

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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

1.5 d
D
0.5 d
2.5 d

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Process Equipment and Plant Design
For given number of passes, pitch & tube diameter, the maximum number of tubes that can be accommodated in a shell of tripled inside diameter will be __________ times.

Considerably less than 9
Considerably more than 9
About 3
About 9

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Process Equipment and Plant Design
The distance between the centre of a rivet hole to the nearest edge of the plate is called

Back pitch
Pitch
None of these
Margin

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Process Equipment and Plant Design
Hole diameter of the seive trays in the distillation column ranges from __________ mm.

12.5 to 18.5
4 to 8
L to 3
3 to 12.5

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

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

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