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Process Equipment and Plant Design

Process Equipment and Plant Design
Lessing ring is formed by the addition of a partition across the centre of a raschig ring, which results in an area increase of about __________ percent.

5
35
55
20

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Process Equipment and Plant Design
Diameter of the seive tray column is determined by the

Height of the plate spacing
Lower limit of vapour velocity
Upper limit of the vapour velocity
Hole diameter of the seive tray

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

Cone
Umbrella
Flat
Dome

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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

Downcomer liquid seal
Skirt clearance
Static submergence
None of these

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Process Equipment and Plant Design
An underdesigned steam trap will

Back up condensate and cause water hammer in steam line
Waste steam
Destroy itself of acceleration wear due to rapid recycling
None of these

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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.

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

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