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Process Equipment and Plant Design

Process Equipment and Plant Design
Le/D for fully open globe value may be around

300
75
10
25

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Process Equipment and Plant Design
Which of the following types of reactors is the safest from operation point of view?

A liquid phase reactor
A liquid phase catalytic reactor
Pot type reactor
A vapor phase reactor

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Process Equipment and Plant Design
Brass valves are usually made for pipe sizes __________ inches.

>2.5
>3.5
?1
?2

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Process Equipment and Plant Design
Of the pressure vessels, with same thickness but different diameters, which one withstands higher pressure?

Strength of the vessel is same irrespective of the diameter
Smaller dia vessel
Larger dia long vessel
Larger dia vessel

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Process Equipment and Plant Design
The optimum size ratio for two mixed reactors in series depends on the kinetics of the reaction and the conversion level. For reaction orders more than one, the

Equal sized reactors are the best
Larger reactor should come first
None of these
Smaller reactor should come first

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Process Equipment and Plant Design
Angled baffles are preferred in the agitation tank to control the swirling action; if the viscosity of the liquid to be mixed is about 200 poise. However, the baffle may be completely eliminated for mixing liquids having viscoisty above __________ poise.

300
600
1000
1500

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