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Process Equipment and Plant Design

Process Equipment and Plant Design
The minimum shell thickness for tank ≤ 15 metres diameter is limited to __________ mm, for reasons of elastic stability.

5
10
15
2

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Process Equipment and Plant Design
Baffle spacing is generally __________ the I.D. of the shell.

More than
Not greater than
Both B and C
Not less than one fifth of

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Process Equipment and Plant Design
Thin spherical shells subjected to internal pressure, develop __________ stresses.

Circumferential
Neither A nor B
Radial
Both A & B

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Process Equipment and Plant Design
In case of a shell and tube heat exchanger, the minimum shell thickness for carbon steel (inclusive of corrosion allowance) depends on shell diameter and is in the range of __________ mm.

44183
43962
43895
44058

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Process Equipment and Plant Design
The minimum baffle height should be

Twice the impeller diameter
Equal to the impeller diameter
Twice the tank diameter
3/4 of the tank height

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Process Equipment and Plant Design
Normally, the length to diameter ratio of rotary dryers varies form 4 to 10 and for its economic operation, the number of transfer units (NTU) for such dryers varies from

7.5-10.0
3.5-5.5
1.5-2.5
44119

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