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Process Equipment and Plant Design

Process Equipment and Plant Design
In a continuous distillation column, the optimum reflux ratio ranges from __________ times the minimum reflux ratio.

1.6 to 2
2.7 to 3
2.2 to 2.6
1.1 to 1.5

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Process Equipment and Plant Design
Which of the following efficiencies can be greater than 100%?

Murphree plate efficiency
Overall plate efficiency
Point efficiency
None of these

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Process Equipment and Plant Design
Optimum economic pipe diameter for fluid flow is determined by the

None of these
Total cost considerations (pumping cost plus fixed cost of the pipe)
Density of the fluid
Viscosity of the fluid

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Process Equipment and Plant Design
Tube wall thickness depends on the cor-rosiveness of the fluids and their operating pressure & temperature and is specified by Birmingham wire gauge (B.W.G)-a number which varies from 8 to 18 with the numbers 14 and 16 being more commonly used. Outside diameter of tubes varies from about 15 to 50 mm; however a tube of less than __________ mm outside diameter is generally not recommended for fouling fluids.

16
28
38
19

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Process Equipment and Plant Design
Lap joints are preferred for plates having thickness __________ mm.

43961
> 3
< 12.5
> 5

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Process Equipment and Plant Design
For pipe flows, head is proportional to __________ at constant capacity (where D = pipe diameter ).

1/D⁵
1/D²
D²
1/D

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