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Process Equipment and Plant Design

Process Equipment and Plant Design
Minimum tube pitch recommended for shell and tube heat exchangers is about __________ times the outside diameter of the tube.

2.5
1.75
3.5
1.25

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Process Equipment and Plant Design
Maximum acceptable total liquid gradient over a tray is about __________ mm.

45.5
12.5
5.5
30.5

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Process Equipment and Plant Design
With increase in gas flow rate to fabric surface area ratio (Nm³/hr/m² fabric surface area), the size & the cost of a bag filter

None of these
Remain unaffected
Increases
Decreases

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Process Equipment and Plant Design
Back-trapping in a distillation column results due to

Low reflux ratio
Excessive liquid gradient over the tray
High gas velocity
Low gas velocity

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Process Equipment and Plant Design
At equal mass velocities, the values of film co-efficients for gases as compared to that for liquids are generally.

Higher
Unpredictable
Lower
Same

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Process Equipment and Plant Design
Tube side pressure drop in a 1-2 heat exchanger (for turbulent flow of fluids through the tubes) is about __________ times, that in a 1-1 heat exchanger having the same size & number of tubes and operated at the same liquid flow rate.

1/2
2
4
8

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