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Process Equipment and Plant Design

Process Equipment and Plant Design
Longitundinal stress induced in a thin walled cylindrical storage vessel is

PD/4t
PD/6t
PD/3t
PD/2t

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Process Equipment and Plant Design
Nominal size of a pipe is an indication of its __________ diameter.

None of these
Approximate
Inner
Outer

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Process Equipment and Plant Design
The minimum shell thickness for tank ≤ 15 metres diameter is limited to __________ mm, for reasons of elastic stability.

10
5
15
2

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

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Process Equipment and Plant Design
What is the slope of the operating line in the rectifying section of a distillation coloumn?

∞
> 1

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Process Equipment and Plant Design
In inclined long tube vertical evaporators, the tubes are inclined at an angle of

60°
45°
90°
15°

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