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Process Equipment and Plant Design

Process Equipment and Plant Design
The minimum baffle height should be

Twice the tank diameter
Twice the impeller diameter
3/4 of the tank height
Equal to the impeller diameter

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Process Equipment and Plant Design
__________ heat exchanger is also known as 'hair pin type' exchanger,

Regenerative
Double pipe
Plate type
Finned

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Process Equipment and Plant Design
A rivetted joint does not fail by __________ of rivets.

Tearing of the plate across a row
Shearing
Tearing
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?

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

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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

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

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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
L/Z.H.ρ
Z.H/L.ρ
H.ρ/L

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