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Process Equipment and Plant Design

Process Equipment and Plant Design
A minimum clearance of about __________ mm is maintained between the distillation column wall and the bubble cap.

76
19
95
38

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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

None of these
20.2
20.8
2

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Process Equipment and Plant Design
In most of the shell and tube heat exchangers, the tube pitch is generally __________ the tube diameter.

Less than
1.25-1.50 times
2.5 times
One-fourth of

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Process Equipment and Plant Design
Bubble cap diameter used for the distillation column having diameter ranging from 1.5 to 4.5 metres is about __________ mm.

150
50
100
10

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Process Equipment and Plant Design
In case of plain carbon steel, butt welded joints are used for shell plate thickness ≤ __________ cms. .

0.5
3.8
1.2
6.8

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Process Equipment and Plant Design
The main purpose of providing stepping on the trays is to

Facilitate handling of large flow rate of liquid
Improve the flow condition
Increase the residence time
Decrease the pressure drop

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