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Process Equipment and Plant Design

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

All of these
Raschig rings
Lessig rings
Cross-partition rings

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Process Equipment and Plant Design
The ends of a cylinderical vessel can be closed by a head, which can be one of the four shapes. For the same thickness, choose the one which can withstand the highest pressure.

Ellipsoidal
Torispherical
Hemispherical
Flat plate

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Process Equipment and Plant Design
Tube wall thickness depends on the cor-rosiveness of the fluids and their operating pressure & temperature and is specified by Birmingham wire gauge (B.W.G)-a number which varies from 8 to 18 with the numbers 14 and 16 being more commonly used. Outside diameter of tubes varies from about 15 to 50 mm; however a tube of less than __________ mm outside diameter is generally not recommended for fouling fluids.

38
19
16
28

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

Both B and C
Bolts
A hold down bar
Rivets

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Process Equipment and Plant Design
Wind load consideration in the design of a support can be neglected, when the vessel is

None of these
Tall (say 30 metres), but is full of liquid
Tall but empty
Short (< 2 m) and housed indoor

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Process Equipment and Plant Design
Angled baffles are preferred in the agitation tank to control the swirling action; if the viscosity of the liquid to be mixed is about 200 poise. However, the baffle may be completely eliminated for mixing liquids having viscoisty above __________ poise.

600
1000
1500
300

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