Chemical Engineering MCQs

6108 MCQs  (Page 227 of 611)

Attempt Chemical Engineering Quiz
Washability curve based on float and sink test enables an assessment to be made of the possibility of cleaning a coal fraction based on the____________________?
A. Density separation
B. Differential wettability
C. Size
D. Volatile matter content
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In a ball mill, the volume occupied by the balls (when the mill is stopped) is about _______________ percent of the volume of the mill?
A. 35
B. 50
C. 70
D. 85
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Use of grinding aids results in the ___________________?
A. Enhanced production rate
B. Finer products
C. Both a. & b.
D. Neither a. nor b.
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______________ are used for the separation of coarse particles from a slurry of fine particles?
A. Thickeners
B. Classifiers
C. Hydrocyclones
D. Decanters
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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
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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
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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
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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
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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
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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
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Word of the Day
27 Jul
Widen
make or become wider.
چوڑا ہونا، کشادہ کرنے کا عمل

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