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Process Equipment and Plant Design

Process Equipment and Plant Design
__________ closure is the weakest enclosure for cylindrical vessels.

Conical or flat plate
Hemispherical
Elliptical
Torispherical

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Process Equipment and Plant Design
In case of bubble cap distillation column of diameter greater than 1.2 metres, the cap diameter is roughly about __________ cms.

10
35
30
20

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Process Equipment and Plant Design
__________ is the determining factor for the number of bubble caps to be used per tray.

Vapor load
Permissible slot velocity
Tray diameter
Liquid load

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Process Equipment and Plant Design
A pipe is generally made of circular cross-section, because a circular cross-section has the

Both A & B
Lowest surface area requirement for a given volume
None of these
Higher structural strength

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Process Equipment and Plant Design
Cooling water fouling factors vary in the range of 0.001 to 0.003

(BTU/hr.ft² . °F)⁻¹
(kcal/hr.m² .°C)⁻¹
(kcal/hr. m. °C)⁻¹
(W/m².°K)⁻¹

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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

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

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