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Process Equipment and Plant Design

Process Equipment and Plant Design
Cylinderical shell thickness of rotary drier is generally __________ mm.

43990
18-22
43864
44180

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Process Equipment and Plant Design
Stage efficiency for packed tower varies with the

Operating pressure and column diameter
Fluid rates and fluid properties
Type & size of packing
All of these

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Process Equipment and Plant Design
Where does the maximum tensile strength occur in a thick cylindrical vessel subjected to internal pressure?

At the mid thickness of the cylindrical wall
At the outer surface
None of these
At the inner surface

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Process Equipment and Plant Design
Smaller sized packings are generally dumped to the packed columns, and the large ones of size greater than __________ mm are stacked individually, which provides better control over bed porosity and offers lower gas pressure drop.

25
150
75
50

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Process Equipment and Plant Design
The slope of the feed line in distillation opeartion is given by (where, q = fraction of the feed stream that is liquid.)

-q
None of these
-q/(1-q)
-q/(q-1)

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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.

19
38
16
28

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