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Process Equipment and Plant Design

Process Equipment and Plant Design
Friction factor for turbulent flow in a new pipe is given by

f = 0.04/NRe0.16
f = 16/NRe
f = 0.22 NRe0.05
f = 25/NRe

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Process Equipment and Plant Design
Value of Peclet number = 0, is the representative of

Complete back mixing
Laminar flow
Plug flow
Eddy diffusivity = 0

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Process Equipment and Plant Design
Speed of industrial paddle agitator ranges from __________ rpm.

20 to 100
500 to 750
1 to 5
1000 to 2000

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Process Equipment and Plant Design
Maximum plate efficiency is achieved in case of __________ flow.

Split
Cascade
Reverse
Cross

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Process Equipment and Plant Design
In case of a 'thin' pressure vessel, the ratio of its diameter to wall thickness is

> 20
< 10
> 10
30

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Process Equipment and Plant Design
The circumferential (hoop) stress in a thin walled cylinderical vessel under internal pressure is

pd/2t
pd/4t
pd/t
pd/3t

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