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Process Equipment and Plant Design

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

Cross-partition rings
Lessig rings
All of these
Raschig rings

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Process Equipment and Plant Design
The diameter of a propeller agitator used in agitation tank ranges from __________ percent of the tank diameter and its peripherial speed is normally 300 to 500 metres/minute.

5 to 10
15 to 30
55 to 75
40 to 50

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Process Equipment and Plant Design
Bracket supports are the most suitable for supporting __________ vessels.

Horizontal
Thin shperical (e.g. Horton sphere)
Thick walled vertical
None of these

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Process Equipment and Plant Design
At the following point for a given packing and set of fluids, the pressure drop per metre of packed height, with variation in fluid rates and operating pressure

Increases
Decreases
May increase or decrease depending upon the solubility of the gas in the liquid
Remains same

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Process Equipment and Plant Design
The thickness of heat transfer plates used in the plate type heat exchanger ranges from __________ mm, pressed in a single piece provided with grooves & corrugations.

44055
1.25 to 3.125
3.5 to 7.0
0.3 to 0.8

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Process Equipment and Plant Design
The longitudinal stress induced in a thin walled cylinderical vessel under internal pressure is

pd/8t
pd/t
pd/2t
pd/4t

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