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Process Equipment and Plant Design

Process Equipment and Plant Design
The difficulty of liquid distribution in packed towers is accentuated, when the ratio of tower diameter to packing diameter is

> 20 < 50
< 7
< 30
> 7 < 15

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Process Equipment and Plant Design
In a shell and tube heat exchanger, the overall heat transfer co-efficient is proportional to the tube side (volumetric flow rate)0.8. This is valid, only when the ratio of the tube side film resistance to the total resistance is almost equal to

∞
20.8
2
1

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Process Equipment and Plant Design
The thermal stress in a metallic bar does not depend upon the

Changes in temperature
Both A & B
Cross-sectional area
Neither A nor B

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Process Equipment and Plant Design
Hazards associated with the relief valve leakage for extremely hazardous material storage can be taken care of by providing

Dikes
Rupture diaphragm
None of these
Surge chamber

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Process Equipment and Plant Design
Baffles are provided in a shell and tube heat exchanger to increase the turbulence and velocity of the shell side fluid. Which of the following shaped baffles does not fall in the category of transverse baffle?

Flat plate extending across the wall
Helical type baffle
Disk type baffle
Segmental baffle

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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

0.3
0.75
0.01
0.95

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