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

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

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Process Equipment and Plant Design
Bubble cap diameter used for the distillation column having diameter ranging from 1.5 to 4.5 metres is about __________ mm.

10
50
100
150

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Process Equipment and Plant Design
Pressure drop (Δp) and the superficial gas mass velocity (G) in case of packed absorption tower operating in the preloading range are related as

Δp = G
Δp = G2
Δp = 1/G0.6
Δp = G0.5

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Process Equipment and Plant Design
A claming section before the liquid flows into the downcomer is privided to

Permit release of entrained vapour in the liquid
Cool the liquid before it flows down
Reduce the discharge fluctuation
Ensure better vapour-liquid contact

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Process Equipment and Plant Design
The testing pressure of storage tanks and pressure vessels designed as per Indian standard codes should be about __________ times.the design pressure.

1.5 to 2
4 to 5
>5
3 to 4

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