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Process Equipment and Plant Design

Process Equipment and Plant Design
In a distillation column, the minimum residence time for liquid in the downspout is about __________ seconds.

80
8
180
1

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Process Equipment and Plant Design
A rivetted joint does not fail by __________ of rivets.

None of these
Tearing
Shearing
Tearing of the plate across a row

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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
55 to 75
40 to 50
5 to 10

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Process Equipment and Plant Design
In a multiple effect evaporator system having 'n' effects, the amount of water evaporated per unit surface area in approximately equal to __________ times that in a single effect.

1.5 nth
0.5 nth
(1/n)th
nth

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Process Equipment and Plant Design
The clearance between two tubes in a shell and tube heat exchanger is known as 'ligament', whose minimum value is __________ the outside diameter of the tube, but in no case it should be less than 4.5 mm.

Three fourth
One fourth
Half
Equal to

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

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

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