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Process Equipment and Plant Design

Process Equipment and Plant Design
__________ liquor is best handled in a long tube vertical evaporator.

Scaling
Foamy
Viscous
Salting

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Process Equipment and Plant Design
For given number of passes, pitch & tube diameter, the maximum number of tubes that can be accommodated in a shell of tripled inside diameter will be __________ times.

Considerably more than 9
About 9
Considerably less than 9
About 3

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Process Equipment and Plant Design
Tube wall thickness depends on the cor-rosiveness of the fluids and their operating pressure & temperature and is specified by Birmingham wire gauge (B.W.G)-a number which varies from 8 to 18 with the numbers 14 and 16 being more commonly used. Outside diameter of tubes varies from about 15 to 50 mm; however a tube of less than __________ mm outside diameter is generally not recommended for fouling fluids.

28
16
19
38

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Process Equipment and Plant Design
The ratio of tube length to shell diameter in case of liquid shell and tube heat exchanger ranges from

4 to 8
6 to 12
3 to 5
2 to 3

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Process Equipment and Plant Design
Saddle supports are used for supporting __________ vessels.

Thick walled vertical
Thick spherical
Horizontal cylinderical
Tall vertical

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Process Equipment and Plant Design
Value of Peclet number = ∞, is the representative of

Eddy diffusivity = 0
Laminar flow
Plug flow
Complete back mixing

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