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Process Equipment and Plant Design

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

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

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Process Equipment and Plant Design
Baffle spacing is generally __________ the I.D. of the shell.

More than
Both B and C
Not greater than
Not less than one fifth of

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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

Remain unaffected
Increases
Decreases
None of these

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Process Equipment and Plant Design
The distance between the top of the slots and the liquid surface when the static liquid is just ready to flow over the overflow weir is called

Static submergence
Downcomer liquid seal
None of these
Skirt clearance

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Process Equipment and Plant Design
A single pass air heater is connected to a two pass unit. For the air flow rate and other conditions remaining the same, the film heat transfer co-efficient for air will vary in the ratio of

20.8
None of these
2
20.2

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Process Equipment and Plant Design
Removable connection of tubes to tube sheet is called

Nipple
Socket
Saddle
Ferrule

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