Process Equipment and Plant Design
Compensation against openings in process vessels for giving inlet and outlet connections, for providing sight glasses and manholes etc. is provided for strength and rigidity. The most efficient type of compensation is of __________ type.

Nozzle or rim
Ring plate
Flared out
Fluid in

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Process Equipment and Plant Design
Pick out the wrong statement pertaining to the design of the bubble cap tray of a distillation column to give stable operation and even vapour distribution.

The dimensionless ratio of liquid gradient to pressure drop head caused by the bubble cap assembly should be less than 0.4
The pressure drop due to the caps & slots and the static submergence should be as high as practicable for reasonable operation
None of these
Tendency towards stable operation is increased by increasing the skirt clearance of the caps, lowering the rate of liquid flow per unit plate width or increasing the spacing between the caps

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Process Equipment and Plant Design
Overall tray efficiency of a distillation column is the ratio of the number of

Overall gas transfer units to the number of ideal trays required
Real trays required to the number of ideal trays required
Ideal trays required to the number of real trays required
None of these

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Process Equipment and Plant Design
Practical dividing line between a ductile and brittle materials is suggested, when the ultimate elongation is about 5%. Generally, larger the knuckle radius, stronger is the corner torus section of a head. The knuckle radius provided should be less than __________ of the head.

6% of I.D.
Either A or B, whichever is larger
3 times the thickness
Either A or B, whichever is smaller

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