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Process Equipment and Plant Design

Process Equipment and Plant Design
The retention time of material in a rotary dryer depends upon its

Flights arrangement
Rpm
All of these
Slope & length

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Process Equipment and Plant Design
Overall mass transfer co-efficient in case of absorption of __________ in water is based on the gas film co-efficient only, as the mass transfer process is gas film (phase) controlling.

SO₂
NH₃
CO₂
None of these

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Process Equipment and Plant Design
What is the minimum recommended ligament for square pitch arrangement in case of heat exchangers?

6.5 cms
Equal to tube I.D
6.5 mm
Equal to tube O.D

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Process Equipment and Plant Design
Fouling factor must be included in the calculation of over all design heat transfer coefficient, when the liquid

Is highly viscous
Is of high specific gravity
Containing suspended solids flows at high velocity
Containing suspended solids flows at low velocity

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Process Equipment and Plant Design
Lug support is

All of these
The most suitable for thick vertical vessel
Provided usually for vessels of much smaller height than skirt supported vessels
Same as bracket support

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Process Equipment and Plant Design
Theoretically calculated diameter of the stripping section of the continuous rectification column is __________ that of the enriching section.

Less than
More than
Either more or less (depending upon relative volatility)
Same as

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