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Process Equipment and Plant Design

Process Equipment and Plant Design
In a distillation column, minimum clearance to be maintained betweeen the overflow weir and the last row of the bubble caps is __________ cms.

7.5
15
20
2.5

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Process Equipment and Plant Design
Smaller sized packings are generally dumped to the packed columns, and the large ones of size greater than __________ mm are stacked individually, which provides better control over bed porosity and offers lower gas pressure drop.

75
150
25
50

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Process Equipment and Plant Design
In seive plate column, holes are drilled or punched in sizes ranging from 2.5 to 12 mm (5 mm being widely used). The hole pitch is normally __________ times the hole diameter to give the required hole area.

0.5 to 1.5
5 to 10
10 to 15
2.5 to 4.0

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Process Equipment and Plant Design
An increase in the liquid resistance to interphase mass transfer and a resultant reduction in plate efficiency is caused by

All of these
An increase in liquid viscosity
Decrease in gas solubility for absorbers
An increase in relatived volatility for rectification columns

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Process Equipment and Plant Design
Joint efficiency (J) for a seamless pipe is

1
0.85
1.2
< 0.5

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Process Equipment and Plant Design
The shell side pressure drop in a shell and tube heat exchanger is maximum for __________ baffle.

Orifice
Disk and ring
Independent of the type of
Segmental

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