PROCESS EQUIPMENT AND PLANT DESIGN QUIZ

Generally, elliptical dished heads

Are manufactured on 2:1 ratio of major to minor axis and is recommended to be used for pressure vessels operating above a pressure of 1.5 MN/m²

Resist half the pressure rating compared to hemi spherical head provided on the cylindrical shell of the same thickness and diameter

All of these

Are approximately as strong as seamless cylindrical shell having the corresponding I.D and O.D

TRUE ANSWER : ?
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Le/D for a Tee (used as elbow, entering run) would be around

350

5

60

200

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Frame thickness in the plate and frame filter press is normally in the range of __________ inches.

1 to 12

0.25 to 4

0.25 to 8

1 to 5

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The wall thickness for a large high pressure pipeline is determined by the consideration of the

Circumferential pipewall tension

Forces exerted by static and dynamic action at bends

Axial tensile stress in the pipe

Temperature stresses

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The ratio of the largest load in a test to the original cross-sectional area of the test specimen is called the __________ stress.

None of these

Ultimate

Yield point

Breaking

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__________ is the determining factor for the number of bubble caps to be used per tray.

Liquid load

Tray diameter

Permissible slot velocity

Vapor load

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The buckling tendency of compression members is always in the direction of the

None of these

Axis of the load

Least radius of gyration

Perpendicular to the axis of the load

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In perforated plate towers, the

Hole sizes may be around 1/8" or 3/16"

Total hole area may be around 6 to 15% of tower cross-sectional area

All of these

Pressure drop is less compared is similar bubble cap towers

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for couplings and unions would be

350

200

60

Negligible

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Liquid gradient over the tray results due to the

Large plate spacing

Resistance offered to flow of liquids by caps & risers and the flow of gas

Large reflux ratio

Low gas velocity

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