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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

During the constant rate period of drying of a solid ?
A Increased air humidity decreases the rate of drying
B Increasing the air temperature decreases the drying rate
C Surface evaporation of unbound moisture occurs
D None of these
Correct Answer: Surface evaporation of unbound moisture occurs
Ammonia present in the coke oven gas is removed by washing with___________________?
A Caustic solution
B Dilute ammoniacal liquor
C Dilute HCl
D Ethanolamine
Correct Answer: Dilute ammoniacal liquor
For ethanol-water system, the lowering of distillate quality from 95% to 92% will cause ____________________ plate requirement?
A No change in theoretical
B Marginal decrease in the number of
C Major decrease in the number of
D None of these
Correct Answer: Marginal decrease in the number of
Lewis number (Le) is___________________?
A Sc × Pr
B Pr × St
C Sh × Pr
D St × Sh
Correct Answer: Sc × Pr
Most important factor to be considered in the selection of packings for absorbers is the ______________ of packing?
A Size
B Durability
C Porosity
D Cost
Correct Answer: Porosity
To get high tray efficiency___________________?
A Interfacial surface between liquid and gas phase should be large
B Time of contact between the two phases should be less
C Gas velocity should be very low
D Liquid entrainment should be severe
Correct Answer: Interfacial surface between liquid and gas phase should be large
In a gas-liquid absorption column, for obtaining the maximum absorption efficiency____________________?
A Liquid stream should be distributed uniformly
B Gas stream should be distributed uniformly
C Both gas as well as liquid streams should be distributed uniformly
D By passing should be completely avoided
Correct Answer: Both gas as well as liquid streams should be distributed uniformly
The slope of the operating line for a single component co-current absorber when plotted in terms of mole ratio units is__________________?
A 0
B ∞
C -ve
D +ve
Correct Answer: -ve
For a ternary mixture, in which equilateral triangular co-ordinate is used in leaching and extraction, a _______________ of the equilateral triangular co-ordinates?
A Binary mixture is represented by the apex
B Binary mixture is represented by any point inside
C Ternary mixture is represented by the sides
D Pure component is represented by the apex
Correct Answer: Pure component is represented by the apex
Leaching of uranium ore and gold ore is done in________________________?
A Centrifugal extractor
B Pachuca tanks
C Bollman extractor
D None of these
Correct Answer: Pachuca tanks
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