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Process Equipment and Plant Design

Process Equipment and Plant Design
Reflux ratio variation in a distillation column is between

Minimum and infinity
Zero and one
Zero and infinity
None of these

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Process Equipment and Plant Design
Overall mass transfer co-efficient in case of absorption of __________ in water is based on the gas film co-efficient only, as the mass transfer process is gas film (phase) controlling.

SO₂
NH₃
None of these
CO₂

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Process Equipment and Plant Design
Diameter of the seive tray column is determined by the

Upper limit of the vapour velocity
Lower limit of vapour velocity
Height of the plate spacing
Hole diameter of the seive tray

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Process Equipment and Plant Design
Bubble cap plate column is

A differential stage contactor
A continuous contactor
Used only for distillation, not for absorption
A finite stage contactor

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Process Equipment and Plant Design
In the agitators, the power required will be changed with the increase of diameter of agitator (D) as

D⁹
D²
D⁵
D

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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
Σ/E
E/σ
E

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