1. Which of the following gives the work required for size reduction of coal to -200 mesh in a ball mill most accurately ?
2. Traces of solids are removed from, liquid in a
3. __________ mills are termed as disintegrators.
4. Which of the following is not categorised as a "mechanical operation"?
5. Sphericity of a cubical particle, when its equivalent diameter is taken as the height of the cube, is
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