A cylinderical pressure vessel of volume 6 ?m3 has to be designed to withstand a

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Question
A cylinderical pressure vessel of volume 6 ?m³ has to be designed to withstand a maximum internal pressure of 10 atm. The allowable design stress of the material is 125N/mm² and corrosion allowance is 2 mm. The thickness of the vessel for a length/diameter ratio of 3 will be close to
Options
A. 5 mm
B. 6 mm
C. 8 mm
D. 10 mm

Correct Answer

10 mm

Process Equipment and Plant Design problems

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2. Pick out the wrong statement.
Options
A. An air cooled finned pipe is diagram-matically represented by
B. A heat exchanger is diagrammatically represented by
C. A 90� welded elbow is diagrammatically represented by
D. A pipe still heater is diagrammatically represented by

4. Liquid gradient over the tray results due to the
Options
A. resistance offered to flow of liquids by caps & risers and the flow of gas.
B. low gas velocity.
C. large plate spacing.
D. large reflux ratio.

8. Fouling factor must be included in the calculation of over all design heat transfer coefficient, when the liquid
Options
A. containing suspended solids flows at low velocity.
B. containing suspended solids flows at high velocity.
C. is highly viscous.
D. is of high specific gravity.

9. Pick out the wrong statement.
Options
A. In practical operation, distillation towers having diameter 3-6 metres equipped with bubble cap (round) size of 15 cms are used.
B. Height of packing in a packed tower is about 3 times the column diameter for raschig rings and about 5 to 10 times the column diameter for saddle packing.
C. In a seive tray, the minimum hole diameter is equal to the tray thickness.
D. In a stainless steel seive tray, the minimum hole diameter is equal to 10 times the plate thickness.

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