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Process Equipment and Plant Design

Process Equipment and Plant Design
In the design of a paddle agitator, the ratio (paddle dia/tank dia) is normally taken as

0.1
0.25
0.5
0.8

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Process Equipment and Plant Design
What is the minimum recommended ligament for square pitch arrangement in case of heat exchangers?

6.5 cms
Equal to tube I.D
6.5 mm
Equal to tube O.D

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Process Equipment and Plant Design
A cylinderical pressure vessel of volume 6 πm³ has to be designed to withstand a maximum internal pressure of 10 atm. The allowable design stress of the material is 125N/mm² and corrosion allowance is 2 mm. The thickness of the vessel for a length/diameter ratio of 3 will be close to

5 mm
6 mm
8 mm
10 mm

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Process Equipment and Plant Design
The maximum liquid gradient over a tray must not exceed

2"-3.5"
5"
0.5" -1.25"
Half the tray spacing

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Process Equipment and Plant Design
__________ of water makes it a widely used coolant in heat exchangers.

Low viscosity
Low corrosiveness
High specific heat
Low dirt factor

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Process Equipment and Plant Design
In common bubble cap distillation column design practice, riser area is approximately equal to (where, Aa = Annular passage area, and Sa = Slot area)

1.2 Aa = 1.2 Sa
Aa = Sa
Sa = 1.5 Aa
Aa = 1.5 Sa

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