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Process Equipment and Plant Design

Process Equipment and Plant Design
Value of Peclet number = ∞, is the representative of

Complete back mixing
Eddy diffusivity = 0
Plug flow
Laminar flow

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Process Equipment and Plant Design
In a __________ rivetted joint, the rivets in the various rows are opposite to each other.

Zig-zag
Chain
None of these
Diamond

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Process Equipment and Plant Design
In packed towers provided with pall rings liquid redistributors are positioned at heights of every 6 metres or 5-10 times the column diameter, whichever is less. Maximum size of the pall rings should not exceed __________ of the column diameter.

1/20-1/30th
1/5-1/10th
1/10-1/15th
1/2 to 1/4th

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Process Equipment and Plant Design
A cylinderical pressure vessel of volume 6 πm³ has to be designed to withstand a maximum internal pressure of 10 atm. The allowable design stress of the material is 125N/mm² and corrosion allowance is 2 mm. The thickness of the vessel for a length/diameter ratio of 3 will be close to

8 mm
5 mm
10 mm
6 mm

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Process Equipment and Plant Design
The necessary wall thickness for a metallic storage vessel is a function of the

Operating pressure and welding/joint efficiency
All of these
Diameter of the vessel
Ultimate tensile strength (or yield point) of the material and operating temperature

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Process Equipment and Plant Design
With increase in gas flow rate to fabric surface area ratio (Nm³/hr/m² fabric surface area), the size & the cost of a bag filter

None of these
Decreases
Remain unaffected
Increases

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