A. Hammer mills
B. Rod mills
C. Gyratory crushers
D. Crushing rolls
Related Mcqs:
- Size reduction of fibrous materials like wood, asbestos, mica etc. is done by a disintegrator exemplified by the _________________?
A. Blake jaw crusher
B. Cage mill
C. Stamp mill
D. Bradford’s breaker - Mixing of light fine powder such as insecticides is done by____________________?
A. Banbury mixer
B. Pug mill
C. Impact wheels
D. Kneader - Filter aids like asbestos, kieselguhr, diatomaceous earth etc. are used to increase the porosity of the final filter cake & reducing the cake resistance during filtration. Filter aid is_______________?
A. Added to the feed slurry
B. Pre-coated on the filter medium prior to filtration
C. Separated from the cake by dissolving solids or by burning it off
D. All A, B. & C. - Maximum size reduction in a ball mill is done by the, ______________ action?
A. Attrition
B. Compression
C. Impact
D. Cutting - Size reduction of moulding powders, waxes, resins & gums are done in a _______________ mill?
A. Cage
B. Hammer
C. Both A. & B.
D. Neither A. nor B. - 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 - For spheres, volume shape factor is given by____________________?
A. π = (A/D2)
B. 2π = (2A/D2)
C. π/6 = (V/D3)
D. AD/V - Toothed roll crushers achieve size reduction by___________________?
A. Tearing (shear) and compression
B. Impact and attrition
C. Both A. & B.
D. Neither A. nor B. - Which of the following size reduction equipments employs mainly attrition for ultrafine grinding ?
A. Jet mills
B. Fluid energy mill
C. Micronizer
D. All A., B. and 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
