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Process Equipment and Plant Design

Process Equipment and Plant Design
In a distillation column, the minimum residence time for liquid in the downspout is about __________ seconds.

1
8
180
80

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Process Equipment and Plant Design
Floating head heat exchangers are used for the

Co-current heat transfer systems
Counter-current heat transfer systems
Heat transfer between corrosive fluids
Cases where temperature difference between the shell and the tubes is more (>50°C)

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Process Equipment and Plant Design
Which tube arrangement in a heat exchanger would facilitate highest heat transfer rate?

Square pitch
Diagonal square pitch
Heat transfer rate is independent of tube arrangement
Triangular pitch

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Process Equipment and Plant Design
The ideal size of round bubble caps to be used in industrial distillation column having a diameter of 3-6 metres is __________ cms.

7.5
5
15
50

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Process Equipment and Plant Design
It is not desirable to design a heat exchanger for LMTD correction factor, FT, of less than

0.99
0.8
0.55
0.95

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Process Equipment and Plant Design
Spherical shaped pressure vessel is considered to be the most ideal, because it can

Be supported very easily
Be fabricated very easily
Be designed without wind load considerations
Withstand higher pressure for a given metallic shell thickness

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