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Process Equipment and Plant Design

Process Equipment and Plant Design
__________ shaped roof is most commonly used for cylindrical tanks.

Umbrella
Dome
Flat
Cone

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

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

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Process Equipment and Plant Design
Which of the following packing materials provides for maximum mass transfer?

Cross-partition rings
Lessig rings
Raschig rings
All of these

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Process Equipment and Plant Design
In a cylinderical vessel subjected to internal pressure, the longitudinal stress σL and the circumferential stress, σh are related by

σh = σL
σh = 2 σL
No relation exists
σh = σL/2

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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
2.2 to 2.6
1.1 to 1.5
1.6 to 2

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Process Equipment and Plant Design
The thickness of segmental baffles (25 -35% cut truncated plates usually) is generally __________ the tube wall thickness.

Four times
Half
Equal to
Twice

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