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Process Equipment and Plant Design

Process Equipment and Plant Design
Maximum acceptable total liquid gradient over a tray is about __________ mm.

45.5
5.5
30.5
12.5

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Process Equipment and Plant Design
The wall thickness of thin cylindrical shell with hemispherical ends is __________ that of the spherical ends.

Either B or C; depends on maximum permissible internal pressure
Equal to
More than
Less than

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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.

1000
300
1500
600

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Process Equipment and Plant Design
What is the slope of the operating line in the rectifying section of a distillation coloumn?

> 1
∞

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Process Equipment and Plant Design
Hoop (circumferential) stress induced in a thin walled 'Horton Sphere' used for the storage of liquid ammonia under pressure is

pD/3t
pD/4t
pD/2t
pD/6t

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Process Equipment and Plant Design
To keep the power input constant for a stirred vessel operating under fully developed turbulent flow conditions (constant power number), if the impeller diameter is increased by 20%, the impeller speed should be decreased by a factor of

(1.2)2/3
(1.2)3/5
(1.2)5/3
(1.2)3/2

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