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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

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Chemical Engineering MCQs designed for job test and interview preparation, particularly for fresh graduates, students, and candidates appearing in competitive exams. These multiple-choice questions cover important topics such as the fundamentals of chemical engineering, chemical processes, chemical reactions, process control, and instrumentation, along with other key concepts in the field.

All Topics  9594

Water entrained by circulating air in cooling towers is termed as____________________?
A Drift
B Blow down
C Vapor load
D None of these
Correct Answer: Drift
Alcohol is dehydrated using _______________________ distillation?
A Extractive
B Azeotropic
C Steam
D Molecular
Correct Answer: Azeotropic
Pick out the wrong statement ?
A In solvent extraction, the distribution co-efficient should be as large as possible for solvent
B With increase in pressure, the solubility of gases in solvent increases at a fixed temperature
C Decrease in Murphree plate efficiency is an indication of entrainment in distillation column
D The capacity of a distillation column is maximum at total reflux
Correct Answer: The capacity of a distillation column is maximum at total reflux
Pick out the wrong statement ?
A Change in barometric pressure does not affect the relative humidity
B In case of a packed tower, the operating velocity is about half of the flooding velocity,
C ‘Elution’ means the desorption of the adsorbed solute by a solvent
D The equilibrium moisture content of the solid can be reduced by increasing the absolute
Correct Answer: The equilibrium moisture content of the solid can be reduced by increasing the absolute
Pick out the wrong statement?
A Mass transfer co-efficient does not account for gas-liquid diffusion
B Diffusion co-efficient and mass transfer co-efficient are not same in any mass transfer
C Contacting cold vapor-gas mixture with hot liquid exemplifies humidification process
D Contacting cold liquid with warm vapor-gas mixture exemplifies dehumidification process
Correct Answer: Mass transfer co-efficient does not account for gas-liquid diffusion
Pick out the wrong statement ?
A Mechanical agitation is required, if the system has low interfacial tension
B Sieve tray towers are generally used for systems having low interfacial tension
C When Henry’s law constant is very small, then the mass transfer rate is controlled by the gas
D Taylor-Prandtl analogy for heat and mass transfer considers the transfer through both laminar
Correct Answer: Mechanical agitation is required, if the system has low interfacial tension
Pick out the wrong statement ?
A Co-current absorbers are usually used, when the gas to be dissolved in the liquid is a pure
B In case of gas absorption, HETP is equal to HTU, when both the operating line & the
C Hatta number is important in case of gas absorption with chemical reaction
D In actual practice, absorption is an endothermic process, while stripping is an exothermic
Correct Answer: In actual practice, absorption is an endothermic process, while stripping is an exothermic
With increase in temperature, the mutual solubility of two liquids_________________?
A Increases
B Decreases
C Remains unchanged
D Decreases exponentially
Correct Answer: Increases
The diffusivity D. in a binary gas mixture is related to the pressure (P) as___________________?
A D ∝ P0.5
B D ∝ 1/P0.5
C D ∝ 1/P
D D ∝ 1/P1.5
Correct Answer: D ∝ 1/P
Mass transfer co-efficient is directly proportional to DAB according to the _____________ theory?
A Film
B Penetration
C Surface-renewal
D None of these
Correct Answer: Film
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