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Process Equipment and Plant Design

Process Equipment and Plant Design
The dust collection efficiency of electrostatic precipitator increases with increase in the

Electrode area
Neither A nor B
Both A & B
Gas flow rate

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Process Equipment and Plant Design
For annular flow of a fluid, the ratio of the equivalent diameter for pressure drop calculation to the equivalent diameter for heat transfer calculation is

(d1 + d2)/d2
D1/(d1 + d2)
(d1 + d2)/d1
D2/(d1 + d2)

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Process Equipment and Plant Design
The force due to wind load acting on a tall vessel depends upon its

Shape
Outside diameter
All of these
Height

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Process Equipment and Plant Design
Heat transfer co-efficient, hG(Kcal/hr.m² .°C) and mass velocity of air, G (kg/hr.m² ) for air flow parallel to the surface in case of constant drying rate in batch drying is related as hG = 0.0176G0.8. But when the flow of air perpendicular to the surface is encountered, this equation changes to

HG = 0.0176G0.37
1.004G0.8
0.0176G1.37
HG = 1.004G0.37

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Process Equipment and Plant Design
Tube height in a calendria type evaporator is normally less than __________ metres.

2
1
5.5
3.5

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Process Equipment and Plant Design
In actual operation of distillation column, the vapour is not distributed uniformly among the bubble caps, primarily because of the

Liquid gradient on the tray
Lower skirt clearance
Lower static submergence
Small downcomer liquid seal

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