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Process Equipment and Plant Design

Process Equipment and Plant Design
Factor of safety (i.e., overdesign factor) in heat transfer equipments is about __________ percent more than the actual/theoretical design factor.

43961
35-40
15-20
30-35

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Process Equipment and Plant Design
Cylindrical storage tanks used for the storage of volatile liquids (e.g., naphtha) have __________ roofs.

Floating
Conical
Flat
Fixed

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Process Equipment and Plant Design
In most of the shell and tube heat exchangers, the tube pitch is generally __________ the tube diameter.

One-fourth of
1.25-1.50 times
2.5 times
Less than

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Process Equipment and Plant Design
Correct use of 'factor of safety' is very important in equipment design. It is defined as the ratio of the

Working stress to ultimate stress
Ultimate stress to breaking stress
None of these
Ultimate stress to working stress

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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?

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

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Process Equipment and Plant Design
Maximum acceptable total liquid gradient over a tray is about __________ mm.

5.5
30.5
12.5
45.5

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