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Process Equipment and Plant Design

Process Equipment and Plant Design
Maximum size of the raschig rings used in a packed tower is about __________ of the coloumn diameter.

1/30th
1/10th
1/50th
1/20th

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Process Equipment and Plant Design
The operating velocity in the absorption tower is usually 40-50% of the flooding velocity. Packed absorption towers are normally designed for a pressure drop of about __________ mm of water column per metre height of packing.

43835
20-40
100-150
1000-1500

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Process Equipment and Plant Design
The value of fouling factor depends upon the

All of these
Velocity of process fluid containing suspended solids
Suspended solids in the fluid
Characteristic of process fluid

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

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

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Process Equipment and Plant Design
In a shell and tube heat exchanger, tube side __________ of the mass velocity.

Both A & B
Heat transfer co-efficient is proportional to 0.8th power
Neither A nor B
Pressure drop is proportional to the square

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