The grinding in a hammer crusher takes place due to the_______________?
A. Attrition
B. Impact
C. Both A. & B.
D. Neither A. nor B.
Mechanical Operations
The capacity of a belt conveyor depends upon two factors. If one is the cross-section of the load, the other is the _____________ of the belt?
The capacity of a belt conveyor depends upon two factors. If one is the cross-section of the load, the other is the _____________ of the belt?
A. Speed
B. Thickness
C. Length
D. None of these
Size reduction does not occur due to compression in case of________________?
Size reduction does not occur due to compression in case of________________?
A. Rod mills
B. Gyratory crushers
C. Jaw crushers
D. Smooth roll crushers
Mass flow of granular solid (M) through a circular opening of dia, D follows_____________________?
Mass flow of granular solid (M) through a circular opening of dia, D follows_____________________?
A. M ∝ √D
B. M ∝ D2
C. M ∝ D3
D. M ∝ D
A pebble mill_________________?
A pebble mill_________________?
A. Is a ball mill
B. Employs flints or ceramic pebbles as the grinding medium
C. Is a tube mill lined with ceramic or other non-metallic liner
D. Both B. and C.
In a mixer, the quantity, (v. L/D) is termed as __________ number (where, v = longitudinal velocity of material, L = length of the mixer, D = diffusivity in axial mixing) ?
In a mixer, the quantity, (v. L/D) is termed as __________ number (where, v = longitudinal velocity of material, L = length of the mixer, D = diffusivity in axial mixing) ?
A. Weber
B. Peclet
C. Brinkman
D. Schmidt
In a roll crusher, both the rolls_________________?
In a roll crusher, both the rolls_________________?
A. Have the same diameter
B. Are rotated towards each other
C. Run either at the same or different speeds
D. All A., B. and C.
In froth floatation, chemical agent added to cause air adherence is called___________________?
In froth floatation, chemical agent added to cause air adherence is called___________________?
A. Collector
B. Frother
C. Modifier
D. Activator
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
Helical screw agitator is used for________________?
Helical screw agitator is used for________________?
A. Mixing highly viscous pastes
B. Blending immiscible liquids
C. Mixing liquids at very high temperature (> 250 °C)
D. None of these