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Process Equipment and Plant Design

Process Equipment and Plant Design
The ratio of down take area to cross-sectional area of the tube, for calendria type evaporator ranges from

1.5 to 2
0.5 to 1
2 to 2.5
1 to 1.5

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Process Equipment and Plant Design
A high vapour velocity is required for high plate efficiency in a seive plate coloumn. The satisfactory value of operating vapor velocity for design purpose in seive plate column is about __________ percent of the flooding velocity.

80
95
45
60

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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
(0.8)0.5
0.9
1

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Process Equipment and Plant Design
__________ closure is the weakest enclosure for cylindrical vessels.

Conical or flat plate
Hemispherical
Torispherical
Elliptical

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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.

75
25
50
150

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Process Equipment and Plant Design
Accidents in chemical plants are mostly due to

Failure of equipments
Faulty operating procedures
Inadequate equipment design
Improper layout of the equipments

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