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Process Equipment and Plant Design

Process Equipment and Plant Design
Maximum allowable vapour velocity in a bubble cap tower is determined by the

Vapour density
Entrainment considerations
None of these
Diameter of the column

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Process Equipment and Plant Design
In most of the shell and tube heat exchangers, the tube pitch is generally __________ the tube diameter.

2.5 times
1.25-1.50 times
Less than
One-fourth of

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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

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

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Process Equipment and Plant Design
Hold up of material in a operating rotary drier is in the range of

0.25 to 0.50
0.8 to 0.9
0.5 to 0.8
0.05 to 0.15

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Process Equipment and Plant Design
In a shell and tube heat exchanger, the 'tube pitch' is defined as the

Shortest centre to centre distance between adjacent tubes
Shortest distance between two adj acent tube holes
None of these
O.D. of the tube for square pitch

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Process Equipment and Plant Design
In case of plain carbon steel, butt welded joints are used for shell plate thickness ≤ __________ cms. .

0.5
1.2
6.8
3.8

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