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Mechanical Operations

Mechanical Operations
Balls for ball mills are never made of

Cast iron
Lead
Alloy steel
Forged/cast steel

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Mechanical Operations
Theoretical capacity of crushing rolls in tons/hr is given by (where, V = peripherial velocity, m/sec. W = width of rolls, m Dr = distance between rolls ρ = density of material to be crushed, kg/m³ here, V =πN.D where, N = speed of the rolls in rotation per second (rps) D = diameter of rolls, m)

3.6 V.W.Dr.ρ
3.6 W.Dr.ρ
3.6 V.W. ρ
3.6 V.W.Dr/ρ

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Mechanical Operations
To get ultrafine particles, the equipment used is a

Rod mill
Fluid energy mill
Ball mill
Hammer crusher

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Mechanical Operations
Gummy & sticky materials like molasses, sugar etc. are best transported/handled by using a __________ conveyor.

Slat
Ribbon
Drag
Screw

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Mechanical Operations
Molten ammonium nitrate is mixed with ground limestone in fertilizer plant in a

Mixer-extruder
Banbury mixer
Pug mill
Muller mixer

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Mechanical Operations
Paddle agitator

Moves at very high speed
Produces axial flow
None of these
Is suitable for mixing low viscosity liquids

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