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Process Equipment and Plant Design

Process Equipment and Plant Design
Le/D for 90° elbow (medium radius) and 90°square elbow would be respectively around

100 and 250
3 and 5
250 and 600
25 and 60

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Process Equipment and Plant Design
Rivets are generally specified by the

Head diameter
Shank diameter
Overall length
None of these

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Process Equipment and Plant Design
Length to diameter ratio of most rotary driers is in the range of

1 to 2
20 to 30
4 to 10
10 to 20

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Process Equipment and Plant Design
In a multipass shell and tube heat exchanger, the baffles on shell side is primarily provided for

Reducing scale deposition
Fixing the tubes
Creating turbulence
Increasing pressure drop

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Process Equipment and Plant Design
The difficulty of liquid distribution in packed towers is accentuated, when the ratio of tower diameter to packing diameter is

> 20 < 50
< 30
< 7
> 7 < 15

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

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