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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

The value of work index does not change materially from one equipment to another. If the value of work index determined for close circuit grinding is Wi, then the same for open circuit grinding will be_________________?
A 0.5 Wi
B Wi
C 1.34 Wi
D 3.34 Wi
Correct Answer: Wi
Which of the following oxides is not present in hematite iron ore ?
A Titanium oxide
B Calcium oxide
C Cobalt oxide
D Manganese oxide
Correct Answer: Cobalt oxide
In filtration, the use of ‘filter aid’ helps in__________________?
A Reducing the filtration pressure
B Accelerating the rate of filtration
C Deplugging the filter medium
D Enhancing the cake porosity in case of a dense impermeable cake
Correct Answer: Deplugging the filter medium
Activators are those chemicals which help buoying up one mineral in preference to the other in the froth floatation process. Which of the following is an activator ?
A Cresylic acid
B Copper sulphate
C Calcium carbonate
D Sodium carbonate
Correct Answer: Copper sulphate
The filtrate flow rate in constant pressure filtration___________________?
A Continuously increases
B Continuously decreases
C Remain constant throughout
D May increase or decrease; depends on the pressure
Correct Answer: Continuously decreases
In case of a ball mill ?
A Coarse feed requires a larger ball
B Fine feed requires a larger ball
C Operating speed should be more than the critical speed
D None of these
Correct Answer: Coarse feed requires a larger ball
Separation of solid suspended in liquid into a supernatant clear liquid and a denser slurry employs a process termed as the___________________?
A Coagulation
B Flocculation
C Sedimentation
D Clarification
Correct Answer: Sedimentation
Gyratory crushers compared to the reciprocating jaw crushers__________________?
A Have greater capacity per unit of discharge area
B Crush intermittently
C Are less suitable for coarse materials
D Have less steady power consumption
Correct Answer: Have greater capacity per unit of discharge area
Pick out the wrong statement ?
A More commonly used jaw crusher between Dodge jaw crusher and Blake jaw crusher is the
B There are only four methods namely compression, impact, attrition and cutting, which the size
C Cutting machines mainly employ ‘attrition’ for size reduction of solids
D Operating principles of Dodge and Blake jaw crushers are combined in the working of
Correct Answer: Cutting machines mainly employ ‘attrition’ for size reduction of solids
Size reduction of ice and gypsum can be accomplished suitably by a _______________ crusher?
A Blake jaw
B Toothed roll
C Gyratory
D None of these
Correct Answer: Toothed roll
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