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Process Equipment and Plant Design

Process Equipment and Plant Design
Scale up problem in design based on the similarity concept takes into account __________ similarity.

Geometrical
Dynamic
Kinematic
All of these

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Process Equipment and Plant Design
In case of 1.5" heat exchanger tubes, the inside flow area __________ with decrease in BWG.

Remains same
None of these
Increases
Decreases

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Process Equipment and Plant Design
At the following point for a given packing and set of fluids, the pressure drop per metre of packed height, with variation in fluid rates and operating pressure

Decreases
Increases
Remains same
May increase or decrease depending upon the solubility of the gas in the liquid

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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.)

H.ρ/L
Z.H.ρ/L
Z.H/L.ρ
L/Z.H.ρ

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Process Equipment and Plant Design
Welded joint efficiency in the design of chemical process equipment is taken as

0.75
0.95
0.55
0.85

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Process Equipment and Plant Design
An increase in the liquid resistance to interphase mass transfer and a resultant reduction in plate efficiency is caused by

Decrease in gas solubility for absorbers
An increase in relatived volatility for rectification columns
An increase in liquid viscosity
All of these

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