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Process Equipment and Plant Design

Process Equipment and Plant Design
Le/D for 90° elbow (medium radius) and 90°square elbow would be respectively around

25 and 60
100 and 250
250 and 600
3 and 5

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Process Equipment and Plant Design
Normal screwed fittings are used for pipes upto a diameter of __________ inches.

5
3
1.5
7

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Process Equipment and Plant Design
In most of the shell and tube heat exchangers, the tube pitch is generally __________ the tube diameter.

2.5 times
Less than
One-fourth of
1.25-1.50 times

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Process Equipment and Plant Design
For turbine agitator, the impeller diameter is about

0.65 to 0.85 d
0.1 to 0.2 d
0.95 d
0.3 to 0.5 d

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Process Equipment and Plant Design
Normally, the plate thickness of the bottoms and roofs of vertically cylindrical storage vessels as compared to that of the cylindrical shell is

Less
More
Same
More or less depending upon the pressure & temperature inside the vessel and the nature of the fluid contained therein

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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

0.01
0.95
0.75
0.3

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