Balls for ball mills are never made of_________________?
Balls for ball mills are never made of_________________?
A. Forged/cast steel
B. Lead
C. Cast iron
D. Alloy steel
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In a roll crusher, the specific power consumption and the production rate is affected by the_________________?
In a roll crusher, the specific power consumption and the production rate is affected by the_________________?A. Reduction ratio
B. Differential roll speed
C. Both A. and B.
D. Neither A. nor B.Kick’s law assumes that the energy required for size reduction is proportional to the logarithm of the ratio between the initial and the final diameters. The unit of Kick’s constant is_________________?
Kick’s law assumes that the energy required for size reduction is proportional to the logarithm of the ratio between the initial and the final diameters. The unit of Kick’s constant is_________________?A. kW. sec/kg
B. kWh/kg
C. kWh/sec. kg
D. kg/secIn case of a hammer crusher, the final product size depends on the____________________?
In case of a hammer crusher, the final product size depends on the____________________?A. Feed rate
B. Rotor speed
C. Clearance between hammer & grinding plates
D. All A., B. and C.Highly viscous liquids & pastes are agitated by________________?
Highly viscous liquids & pastes are agitated by________________?A. Propellers
B. Turbine agitators
C. Multiple blade paddles
D. None of theseRun of mine (ROM) coal is crushed by a _________________________ for use in domestic ovens?
Run of mine (ROM) coal is crushed by a _________________________ for use in domestic ovens?A. Jaw crusher
B. Hammer crusher
C. Ball mill
D. Tube millCrushing of mineral particles is accomplished in a ‘cage mill’, when one or more alloy steel bars are revolved in opposite directions. It is a type of ______________ mill?
Crushing of mineral particles is accomplished in a ‘cage mill’, when one or more alloy steel bars are revolved in opposite directions. It is a type of ______________ mill?A. Impact
B. Roll
C. Vibratory
D. None of these