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Process Equipment and Plant Design

Process Equipment and Plant Design
Longitundinal stress induced in a thin walled cylindrical storage vessel is

PD/2t
PD/4t
PD/3t
PD/6t

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Process Equipment and Plant Design
In condenser, the cooling water is passed in the tube side in a pass arrangement, because

More thinner tubes can be used
It reduces heat transfer area
Pressure drop is reduced
It makes condenser compact

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Process Equipment and Plant Design
Generally, as the length of the liquid path on a tray is increased beyond 5 ft, the overall column efficiency

Remains same
May increase or decrease depending upon the plate spacing
Decreases
Increases

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Process Equipment and Plant Design
Low pressure steam (with saturation temperature between 105 to 120°C) is usually used in the vacuum evaporators, which normally employ a vacuum of about __________ mm Hg (referred to a 760 mm mercury barometer).

250
750
650
450

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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

Deformation
Shear
Bending
Elongation

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Process Equipment and Plant Design
In a distillation column, bubble caps are located on trays with a pitch of __________ times the outside diameter of the caps.

2.5
1.3 to 2
1.6 to 2
1.5 to 3

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