A. Cage
B. Compartment
C. Pebble
D. All tumbling
Related Mcqs:
- ____________ mills fall in the category of tumbling mills ?
A. Ball and pebble
B. Rod and tube
C. Compartment
D. All A., B. & C. - 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 - Size reduction of the ______________ can be suitably done by ball mills, crushing rolls and rod mills?
A. Metalliferous ores
B. Non-metallic ores
C. Basic slags
D. Asbestos & mica - Pebble mills are tumbling mills widely used for grinding in the manufacture of paints & pigments and cosmetic industries, where iron contamination in the product is highly objectionable. Pebbles used in pebble mill are made of__________________?
A. Bronze
B. Stainless steel
C. Flint or porcelain
D. Concrete - _____________ mills are termed as impactors?
A. Hammer
B. Cage
C. Rolling-compression
D. None of these - _____________ Centrifuge is normally used in sugar mills?
A. Tubular bowl
B. Disc-bowl
C. Suspended batch basket
D. Perforated horizontal basket continuous - For efficient grinding, ball mills must be operated__________________?
A. At a speed less than the critical speed
B. At a speed more than the critical speed
C. At a speed equal to the critical speed
D. With minimum possible small balls - Colloidal mills are used for ______________ grinding?
A. Coarse
B. Intermediate
C. Fine
D. Ultrafine - _____________________ baffles are provided in ball mills ?
A. Horizontal
B. No
C. Only two
D. None of these - Stamp mills are generally used for crushing__________________?
A. Iron ores
B. Gold ores
C. Talc
D. Diamond
