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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
Hold baffle in space
Account for thermal strain
None of these

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Process Equipment and Plant Design
In perforated plate towers, the

All of these
Pressure drop is less compared is similar bubble cap towers
Hole sizes may be around 1/8" or 3/16"
Total hole area may be around 6 to 15% of tower cross-sectional area

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Process Equipment and Plant Design
In a distillation column, minimum clearance to be maintained betweeen the overflow weir and the last row of the bubble caps is __________ cms.

20
2.5
15
7.5

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Process Equipment and Plant Design
The dust collection efficiency of electrostatic precipitator increases with increase in the

Gas flow rate
Neither A nor B
Electrode area
Both A & B

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Process Equipment and Plant Design
For laminar flow (NRe < 2100) in steel pipe, the optimum inside pipe diameter is given by

Di, opt = 3.9 Q0.45 . ρ0.23
Di, opt = 3 Q0.36 ρ0.18
Di, opt = 7.6 Q0.36 . ρ0.9
Di, opt = 3 Q0.36 . ρ1.86 μ0.08

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Process Equipment and Plant Design
Pressure differential maintained across a continuous rotary vacuum filter is in the range of __________ mm Hg column.

250 to 500
50 to 100
100 to 150
600 to 700

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