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Process Equipment and Plant Design

Process Equipment and Plant Design
The difficulty of liquid distribution in packed towers is accentuated, when the ratio of tower diameter to packing diameter is

> 20 < 50
> 7 < 15
< 7
< 30

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

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Process Equipment and Plant Design
The safe height (h) to diameter (d) ratio (i.e., h/d) for liquid/petro fuel storage tank of capacity more than 45 kilolitres is less than

2
3.5
1
3

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Process Equipment and Plant Design
Baffle spacing is generally __________ the I.D. of the shell.

More than
Not greater than
Not less than one fifth of
Both B and C

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Process Equipment and Plant Design
The design stress, which is more than the damaging stress, is the least unit stress that will render a member unfit for service before the end of its normal life. The design stress factor or factor of safety indicates the margin between design stress and the __________ stress.

Damaging
Working
None of these
Allowable

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Process Equipment and Plant Design
Steam is preferred to be used as a heating medium in heat exchangers, because of its

Low cost
High film co-efficient
Non-corrosive condensate
High latent heat

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