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Process Equipment and Plant Design

Process Equipment and Plant Design
Pressure drop per tray in the atmospheric distillation column is about __________ psi.

0.07 - 0.12
0.01 - 0.5
0.5 - 1.0
43833

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Process Equipment and Plant Design
In the downcomer of a distillation column, the minimum recommended residence time is about __________ seconds.

12.5
5
17.5
2.5

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Process Equipment and Plant Design
In a thin cylindrical shell, the hoop stress is __________ stress.

Radial
Circumferential tensile
Longitudinal
Compressive

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Process Equipment and Plant Design
A shell may by termed as thin if its thickness to diameter ratio is less than 0.1. The factor which can be neglected in the calculation of membrane stresses is

Shear
Deformation
Elongation
Bending

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Process Equipment and Plant Design
Hoop (circumferential) stress induced in a thin walled 'Horton Sphere' used for the storage of liquid ammonia under pressure is

pD/4t
pD/2t
pD/3t
pD/6t

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Process Equipment and Plant Design
Liquid gradient over the tray results due to the

Large reflux ratio
Large plate spacing
Low gas velocity
Resistance offered to flow of liquids by caps & risers and the flow of gas

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