In case of a hammer crusher, the Rotor shaft carrying hammers can be vertical or horizontal Feed may be highly abrasive (Moh's scale >5) Minimum product size is 3 mm Maximum feed size may be 50 mm TRUE ANSWER : ? YOUR ANSWER : ?
For removal of very small amounts of precipitate from large volume of water, the most suitable filter is the __________ filter. Shell & leaf Sand Plate & frame Rotary vacuum TRUE ANSWER : ? YOUR ANSWER : ?
Production rate __________ with increased fineness, with a given energy input to the size reduction machine. Increases Decreases Remains unchanged May increase or decrease; depends on the machine TRUE ANSWER : ? YOUR ANSWER : ?
For classification of potable (drinking) water, we use a __________ filter. Gravity sand Rotary vacuum Plate and frame Vacuum leaf TRUE ANSWER : ? YOUR ANSWER : ?
Additives used for promoting the floccula-tion of particles is a/an Both A & B Surface active agent Electrolyte Neither A nor B TRUE ANSWER : ? YOUR ANSWER : ?
Cumulative analysis for determining surface is more precise than differential analysis, because of the Assumption that all particles in a single fraction are equal in size, is not needed Fact that screening is more effective Assumption that all particles in a single fraction are equal in size None of these TRUE ANSWER : ? YOUR ANSWER : ?
Screen capacity is proportional to (where, S = screen aperture) 1/S S² S √S TRUE ANSWER : ? YOUR ANSWER : ?
The study on washability of coal is done by using the __________ technique. Elutriation Tabling None of these Heavy media separation TRUE ANSWER : ? YOUR ANSWER : ?
Washability curve based on float and sink test enables an assessment to be made of the possibility of cleaning a coal fraction based on the Volatile matter content Density separation Size Differential wettability TRUE ANSWER : ? YOUR ANSWER : ?
Size reduction of the __________ can be suitably done by ball mills, crushing rolls and rod mills. Metalliferrous ores Non-metallic ores Basic slags Asbestos & mica TRUE ANSWER : ? YOUR ANSWER : ?