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Process Equipment and Plant Design

Process Equipment and Plant Design
The absorption factor is defined as (where, S₁ = slope of the equilibrium curve, S₂ = slope of the operating line)

S₁.S₂
S₁/S₂
S₂/S₁
1/S₁.S₂

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

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Process Equipment and Plant Design
Height of the flights in the rotary drier is in the range of

0.08 to 0.12 d
0.5 to 0.6 d
0.02 to 0.05 d
0.2 to 0.5 d

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Process Equipment and Plant Design
Diameter of bubble caps used in high pressure columns is __________ as compared to that used in identical vacuum columns.

More
Either A or B; no generalisation can be made
Same
Less

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Process Equipment and Plant Design
The most common standard size of bubble caps used in industrial operation is

6" dia cap with 4" dia riser
1" dia cap with 0.5" dia riser
8" dia cap with 1" dia riser
4" dia cap with 8" dia riser

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Process Equipment and Plant Design
Baffles may be eliminated for

None of these
Large diameter tanks
Low viscosity liquids (< 200 poise)
High viscosity liquids (> 600 poise)

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