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Process Equipment and Plant Design

Process Equipment and Plant Design
Baffles may be eliminated for

Large diameter tanks
Low viscosity liquids (< 200 poise)
None of these
High viscosity liquids (> 600 poise)

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Process Equipment and Plant Design
Steam is preferred to be used as a heating medium in heat exchangers, because of its

High film co-efficient
High latent heat
Non-corrosive condensate
Low cost

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Process Equipment and Plant Design
In seive plate column, holes are drilled or punched in sizes ranging from 2.5 to 12 mm (5 mm being widely used). The hole pitch is normally __________ times the hole diameter to give the required hole area.

0.5 to 1.5
5 to 10
2.5 to 4.0
10 to 15

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

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Process Equipment and Plant Design
In a thin cylindrical shell, the hoop stress is __________ stress.

Circumferential tensile
Radial
Compressive
Longitudinal

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Process Equipment and Plant Design
Rotary driers are most economically designed for the number of heat transfer units (HTU) from

10 to 20
1.5 to 2.5
5 to 10
0.01 to 1

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