In the preparation of clay for manufacturing tiles, after making the selected clay free from impurities, it is converted into fine powder in a __________
(a) Pugmill
(b) Ball mill
(c) Continuous kiln
(d) Intermittent kiln
I had been asked this question during an interview.
This intriguing question originated from Clay Products in section Glass, Lime, Clay Products & Bricks of Construction & Building Materials