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Process Equipment and Plant Design

Process Equipment and Plant Design
A minimum clearance of about __________ mm is maintained between the distillation column wall and the bubble cap.

38
76
95
19

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Process Equipment and Plant Design
In a cylinderical vessel subjected to internal pressure, the longitudinal stress σL and the circumferential stress, σh are related by

σh = σL
No relation exists
σh = 2 σL
σh = σL/2

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Process Equipment and Plant Design
Le/D for fully open gate valves would be

Both B and C
Much less (say 2% than that for fully open globe valves)
Much more than that for fully open globe valves
Around 7

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Process Equipment and Plant Design
In a multipass shell and tube heat exchanger, the shell side cross flow area does not depend upon

Clearance
Pitch
None of these
Baffle spacing

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Process Equipment and Plant Design
Lessing ring is formed by the addition of a partition across the centre of a raschig ring, which results in an area increase of about __________ percent.

5
20
55
35

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Process Equipment and Plant Design
The ratio of tube length to shell diameter in case of liquid shell and tube heat exchanger ranges from

2 to 3
6 to 12
4 to 8
3 to 5

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