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Process Equipment and Plant Design

Process Equipment and Plant Design
In the agitators, the power required will be changed with the increase of diameter of agitator (D) as

D⁹
D
D²
D⁵

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Process Equipment and Plant Design
Larger depth of liquid on the trays of a distillation column

Results in higher pressure drop per tray
Neither A nor B
Both A & B
Leads to high tray efficiency

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Process Equipment and Plant Design
Which of the following factors affect the pressure drop in a co-current gas-liquid absorption packed tower?

Size, shape, orientation and surface of the packing particles
Density and viscosity of fluids
Fluid flow rates
All of these

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Process Equipment and Plant Design
In a shell and tube heat exchanger, the overall heat transfer co-efficient is proportional to the tube side (volumetric flow rate)0.8. This is valid, only when the ratio of the tube side film resistance to the total resistance is almost equal to

20.8
2
1
∞

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

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Process Equipment and Plant Design
Movement of pipeline caused by thermal expansion is taken care by providing

Changes in its direction
Change in the shape of pipeline
Expansion joint
All of these

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