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Process Equipment and Plant Design

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

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Process Equipment and Plant Design
Smaller sized packings are generally dumped to the packed columns, and the large ones of size greater than __________ mm are stacked individually, which provides better control over bed porosity and offers lower gas pressure drop.

50
150
25
75

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Process Equipment and Plant Design
Which of the following efficiencies can be greater than 100%?

None of these
Murphree plate efficiency
Overall plate efficiency
Point efficiency

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Process Equipment and Plant Design
Value of Peclet number = 0, is the representative of

Plug flow
Eddy diffusivity = 0
Complete back mixing
Laminar flow

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Process Equipment and Plant Design
Steam economy is defined as the amount of evaporation per unit amount of steam used, while the capacity is the total evaporation obtained per hour. Use of multiple effect in evaporation

Both B & C
Does not affect the capacity
Increases capacity
Increases economy

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Process Equipment and Plant Design
The minimum baffle height should be

Twice the impeller diameter
Equal to the impeller diameter
Twice the tank diameter
3/4 of the tank height

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