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Process Equipment and Plant Design

Process Equipment and Plant Design
In a continuous distillation column, the optimum reflux ratio ranges from __________ times the minimum reflux ratio.

2.7 to 3
1.1 to 1.5
2.2 to 2.6
1.6 to 2

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Process Equipment and Plant Design
The most common standard size of bubble caps used in industrial operation is

4" dia cap with 8" dia riser
1" dia cap with 0.5" dia riser
8" dia cap with 1" dia riser
6" dia cap with 4" dia riser

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Process Equipment and Plant Design
Le/D for fully open globe value may be around

75
10
25
300

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Process Equipment and Plant Design
Commercial packed scrubbers are normally designed for a pressure drop range of __________ mm water coloumn per metre of packed height.

17-34
88-105
43929
52-68

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Process Equipment and Plant Design
The buckling tendency of compression members is always in the direction of the

Least radius of gyration
None of these
Axis of the load
Perpendicular to the axis of the load

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Process Equipment and Plant Design
Pressure drop per tray in the atmospheric distillation column is about __________ psi.

0.01 - 0.5
43833
0.07 - 0.12
0.5 - 1.0

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