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Process Equipment and Plant Design

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

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

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Process Equipment and Plant Design
The LMTD correction factor (FT) is applied in __________ heat exchangers.

All multipass
All of these
1-1 cocurrent
Double pipe

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Process Equipment and Plant Design
The diameter of a propeller agitator used in agitation tank ranges from __________ percent of the tank diameter and its peripherial speed is normally 300 to 500 metres/minute.

40 to 50
55 to 75
5 to 10
15 to 30

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Process Equipment and Plant Design
Baffle width is normally taken as __________ times the tank diameter.

0.4-0.5
0.2-0.45
0.1-0.12
0.45-0.6

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Process Equipment and Plant Design
Diameter of rivet hole (d, mm) and the plate thickness (t, mm) are related by Unwin's formula as

D = 3√t
D = 1.5 t
D = 1.1 t
D = 1.6 √t

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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

44119
3.5-5.5
1.5-2.5
7.5-10.0

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