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Process Equipment and Plant Design

Process Equipment and Plant Design
__________ shaped roof is most commonly used for cylindrical tanks.

Umbrella
Dome
Flat
Cone

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Process Equipment and Plant Design
For laminar flow (NRe < 2100) in steel pipe, the optimum inside pipe diameter is given by

Di, opt = 3 Q0.36 ρ0.18
Di, opt = 3 Q0.36 . ρ1.86 μ0.08
Di, opt = 3.9 Q0.45 . ρ0.23
Di, opt = 7.6 Q0.36 . ρ0.9

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Process Equipment and Plant Design
For high pressure process equipments/vessels, the connected nozzle should be

Brazed
Welded
Flanged
Screwed

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Process Equipment and Plant Design
For annular flow of a fluid, the ratio of the equivalent diameter for pressure drop calculation to the equivalent diameter for heat transfer calculation is

D1/(d1 + d2)
(d1 + d2)/d1
(d1 + d2)/d2
D2/(d1 + d2)

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Process Equipment and Plant Design
Excessive liquid gradient on a tray may result in the

Back trapping
Maldistribution of gas
Gas blowing beneath cap skit
All of these

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Process Equipment and Plant Design
In the design of a paddle agitator, the ratio (paddle dia/tank dia) is normally taken as

0.25
0.5
0.1
0.8

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