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Process Equipment and Plant Design

Process Equipment and Plant Design
Reflux ratio variation in a distillation column is between

Zero and infinity
None of these
Zero and one
Minimum and infinity

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Process Equipment and Plant Design
The distance between the top of the slots and the liquid surface when the static liquid is just ready to flow over the overflow weir is called

None of these
Skirt clearance
Downcomer liquid seal
Static submergence

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Process Equipment and Plant Design
In a rotary drier, the average retention time of solid is(where Z = length of the drier, metres ρ = apparent solid density, kg/m³ L = flow rate of dry solids, kg/see. m² drier cross-section H = hold up of solid.)

Z.H.ρ/L
Z.H/L.ρ
H.ρ/L
L/Z.H.ρ

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Process Equipment and Plant Design
Corrosion allowance in the design of pressure vessel/chemical equipment is not necessary, if

Plain carbon steel and cast iron parts are used
Material of construction is high alloy steel
Both B & C
Wall thickness is > 30 mm

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Process Equipment and Plant Design
Minimum baffle spacing recommended in a shell and tube heat exchanger is equal to

I.D. of the shell
25 cms
40% of the I.D. of the shell
5 cms

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Process Equipment and Plant Design
The force due to wind load acting on a tall vessel depends upon its

Shape
All of these
Outside diameter
Height

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