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Process Equipment and Plant Design

Process Equipment and Plant Design
At equal mass velocities, the values of film co-efficients for gases as compared to that for liquids are generally.

Same
Lower
Higher
Unpredictable

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Process Equipment and Plant Design
In a shell and tube heat exchanger having triangular pitch, the shell side equivalent diameter is given by

(p² - πd²/4)/πd
4(0.86p² - πd²)/πd
4(0.86p² - πd²/4)/πd
(4p² - πd²/4)/πd

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Process Equipment and Plant Design
Liquid redistribution should be done in a packed tower packed with raschig rings every 6 metres or __________ times the column diameter, whichever is lower.

10-12.5
15-20
5-7.5
2.5-3.0

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

1/D
D²
1/D²
1/D⁵

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Process Equipment and Plant Design
Of the pressure vessels, with same thickness but different diameters, which one withstands higher pressure?

Strength of the vessel is same irrespective of the diameter
Larger dia vessel
Smaller dia vessel
Larger dia long vessel

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Process Equipment and Plant Design
The minimum baffle height should be

3/4 of the tank height
Twice the impeller diameter
Equal to the impeller diameter
Twice the tank diameter

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