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Size reduction of the ______________ can be suitably done by ball mills, crushing rolls and rod mills?
Hamad Mechanical Operations 14/07/2021
A. Metalliferous ores
B. Non-metallic ores
C. Basic slags
D. Asbestos & mica
- Height of liquid in agitation tank is normally maintained equal to the tank diameter. However, if the tank is too tall and a large liquid hold up is desired, then two or more impellers mounted on the same shaft may be used. The clearance between the tank bottom and the bottom most impeller should be about (where, D = impeller diameter) ?
- A. 0.5 D B. D C. 1.5 D D. 2 D...
- Where the density difference of the two liquid phase to be separated is very small (as in milk cream separator), the most suitable separator is a____________________?
- A. Disc bowl centrifuge B. Sharpies super-centrifuge C. Batch basket centrifuge D. Sparkler filter...
- Rittinger’s number designates the new surface created per unit mechanical energy absorbed by the material being crushed. Larger value of Rittinger’s number of a material indicates its________________?
- A. Easier grindability B. Poor grindability C. High power consumption in grinding D. None of these...
- ______________ mill is not a revolving mill ?
- A. Pebble B. Compartment C. Cage D. Tube...
- Which of the following is not a wet classifier ?
- A. Sharpies super-centrifuge B. Hydrocyclones C. Dorr Oliver rake classifier D. None of these...
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