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Process Equipment and Plant Design

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

Yield point
None of these
Ultimate
Breaking

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Process Equipment and Plant Design
Of the pressure vessels, with same thickness but different diameters, which one withstands higher pressure?

Larger dia vessel
Strength of the vessel is same irrespective of the diameter
Smaller dia vessel
Larger dia long vessel

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Process Equipment and Plant Design
Back-trapping in a distillation column results due to

High gas velocity
Low reflux ratio
Excessive liquid gradient over the tray
Low gas velocity

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Process Equipment and Plant Design
Elastic failure of a material occurs, when the tensile stress equals yield strength, yield point or the elastic limit. Also, the elastic failure occurs according to maximum strain theory, when the maximum tensile strain equals (where, σ = yield strength and E = modulus of elasticity)

Σ
E/σ
E
Σ/E

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Process Equipment and Plant Design
In a shell and tube heat exchanger, the 'tube pitch' is defined as the

None of these
Shortest distance between two adj acent tube holes
Shortest centre to centre distance between adjacent tubes
O.D. of the tube for square pitch

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Process Equipment and Plant Design
Theoretically calculated diameter of the stripping section of the continuous rectification column is __________ that of the enriching section.

Same as
Less than
Either more or less (depending upon relative volatility)
More than

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