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Process Equipment and Plant Design

Process Equipment and Plant Design
Poisson's ratio of a material is the ratio of unit lateral strain to the unit axial elongation within its elastic limit. The value of Poisson's ratio for structural and pressure vessel steel may be taken as

0.01
0.95
0.75
0.3

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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

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

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Process Equipment and Plant Design
Le/D for fully open gate valves would be

Both B and C
Much more than that for fully open globe valves
Around 7
Much less (say 2% than that for fully open globe valves)

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Process Equipment and Plant Design
Bubble cap diameter used for the distillation column having diameter ranging from 1.5 to 4.5 metres is about __________ mm.

150
100
50
10

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Process Equipment and Plant Design
Le/D for fully open globe value may be around

300
25
10
75

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Process Equipment and Plant Design
Corrosion allowance in the design of pressure vessel/chemical equipment is not necessary, if

Wall thickness is > 30 mm
Both B & C
Material of construction is high alloy steel
Plain carbon steel and cast iron parts are used

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