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Process Equipment and Plant Design

Process Equipment and Plant Design
In a heat exchanger, shell side fluid velocity can be changed by changing the tube

Neither A nor B
Both A & B
Layout
Pitch

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

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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.

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

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Process Equipment and Plant Design
Speed of industrial paddle agitator ranges from __________ rpm.

500 to 750
1 to 5
1000 to 2000
20 to 100

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Process Equipment and Plant Design
In a cylinderical vessel subjected to internal pressure, the longitudinal stress σL and the circumferential stress, σh are related by

σh = σL
σh = σL/2
σh = 2 σL
No relation exists

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Process Equipment and Plant Design
Optimum reflux ratio in a continuous distillation column is determined by the

Total cost consideration (fixed cost of the column plus the cooling water & steam cost)
None of these
Maximum permissible vapour velocity
Flooding limit of the column

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