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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

If a force greater than that of gravity is used to separate solids & fluids of different densities, the process is termed as the __________________?
A Sedimentation
B Flocculation
C Dispersion
D Centrifugation
Correct Answer: Centrifugation
Separation of a suspension or slurry into a supernatant clear liquid (free from particles) and a thick sludge containing a high concentration of solid is called__________________?
A Classification
B Sedimentation
C Clarification
D Decantation
Correct Answer: Sedimentation
Specific surface area is the surface area of a unit _______________ of materials?
A Weight
B Volume
C Either A. or B.
D Neither A. nor B.
Correct Answer: Either A. or B.
Size reduction of fibrous materials like wood, asbestos, mica etc. is done by a disintegrator exemplified by the _________________?
A Blake jaw crusher
B Cage mill
C Stamp mill
D Bradford’s breaker
Correct Answer: Cage mill
Which of the following is not a wet classifier ?
A Sharpies super-centrifuge
B Hydrocyclones
C Dorr Oliver rake classifier
D None of these
Correct Answer: None of these
Maximum size reduction in a fluid energy mill is achieved by___________________?
A Compression
B Interparticle attrition
C Cutting
D Impact
Correct Answer: Interparticle attrition
Ultracentrifuges running at speeds upto 100000 rpm is normally used for the_____________________?
A Separation of isotopes based on their density or molecular weights difference
B Concentration of rubber latex
C Separation of cream from milk
D Dewaxing of lubricating oil
Correct Answer: Separation of isotopes based on their density or molecular weights difference
Filter aids like asbestos, kieselguhr, diatomaceous earth etc. are used to increase the porosity of the final filter cake & reducing the cake resistance during filtration. Filter aid is_______________?
A Added to the feed slurry
B Pre-coated on the filter medium prior to filtration
C Separated from the cake by dissolving solids or by burning it off
D All A, B. & C.
Correct Answer: All A, B. & C.
Trommels are revolving screens which normally operate in the range of _______________ rpm?
A 1 – 2
B 15 – 20
C 40 – 50
D 60 – 75
Correct Answer: 15 – 20
The specific surface of spherical particles is given by (where D and ρ are diameter and density of particle) ?
A 6/D.ρ
B 2/D.ρ
C 4/D.ρ
D 12/D.ρ
Correct Answer: 6/D.ρ
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