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Process Equipment and Plant Design

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
44119
3.5-5.5
1.5-2.5

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Process Equipment and Plant Design
In shell and tube heat exchangers, straight tie rods are used to

None of these
Account for thermal strain
Hold baffle in space
Fix the tubes in position

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Process Equipment and Plant Design
Minimum baffle spacing recommended in a shell and tube heat exchanger is equal to

5 cms
25 cms
40% of the I.D. of the shell
I.D. of the shell

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Process Equipment and Plant Design
Normal screwed fittings are used for pipes upto a diameter of __________ inches.

5
1.5
7
3

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Process Equipment and Plant Design
Frame thickness in the plate and frame filter press is normally in the range of __________ inches.

1 to 5
1 to 12
0.25 to 4
0.25 to 8

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Process Equipment and Plant Design
In a distillation column, the minimum residence time for liquid in the downspout is about __________ seconds.

8
180
1
80

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