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Process Equipment and Plant Design

Process Equipment and Plant Design
Maximum allowable vapour velocity in a bubble cap tower is determined by the

Vapour density
None of these
Diameter of the column
Entrainment considerations

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Process Equipment and Plant Design
The retention time of material in a rotary dryer depends upon its

Rpm
All of these
Flights arrangement
Slope & length

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Process Equipment and Plant Design
For a cylinderical vessel of moderate height, the weld joint efficiency for joints parallel to the cylinderical axis is given as 1.0, while for joints along the girth (circumference) it is given as 0.8. In calculating the shell wall thickness using code formula for an internally pressurised cylinderical vessel, what value of weld joint efficiency should be used?

(0.8)0.5
0.9
1
0.8

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Process Equipment and Plant Design
A minimum clearance of about __________ mm is maintained between the distillation column wall and the bubble cap.

19
38
95
76

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Process Equipment and Plant Design
Which of the following packing materials provides for maximum mass transfer?

All of these
Cross-partition rings
Lessig rings
Raschig rings

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Process Equipment and Plant Design
In distillation columns, bubble caps are held in place over trays by

Bolts
A hold down bar
Both B and C
Rivets

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