Mechanical Operations MCQ Questions & Answers | Chemical Engineering

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36.
Ball mills and tube mills with flint or porcelain balls are used for size reduction of

A. Asbestos

B. Rubber

C. Non-metallic ores

D. Limestone

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37.
Shell and leaf filter as compared to plate and frame filter

A. Entails less labor cost

B. Facilitates filtration under higher pressure

C. Provides more effective washing

D. All of the above

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38.
As particle size is reduced

A. Screening becomes progressively more difficult

B. Screening becomes progressively easier

C. Capacity and effectiveness of the screen is increased

D. None of these

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39.
In case of grinding in a ball mill

A. Wet grinding achieves a finer product size than dry grinding

B. Its capacity decreases with increasing fineness of the products

C. Grinding cost and power requirement increases with increasing fineness of the products

D. All of the above

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40.
Pine oil used in froth floatation technique acts as a/an

A. Collector

B. Modifier

C. Frother

D. Activator

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Mechanical Operations MCQ Questions & Answers | Chemical Engineering

36. Ball mills and tube mills with flint or porcelain balls are used for size reduction of

Answer & Solution

37. Shell and leaf filter as compared to plate and frame filter

Answer & Solution

38. As particle size is reduced

Answer & Solution

39. In case of grinding in a ball mill

Answer & Solution

40. Pine oil used in froth floatation technique acts as a/an

Answer & Solution

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36.
Ball mills and tube mills with flint or porcelain balls are used for size reduction of

37.
Shell and leaf filter as compared to plate and frame filter

38.
As particle size is reduced

39.
In case of grinding in a ball mill

40.
Pine oil used in froth floatation technique acts as a/an