Mechanical Operations A pebble mill Is a tube mill lined with ceramic or other non-metallic liner Employs flints or ceramic pebbles as the grinding medium Both B and C Is a ball mill Is a tube mill lined with ceramic or other non-metallic liner Employs flints or ceramic pebbles as the grinding medium Both B and C Is a ball mill ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations For crushing of solids, the Rittinger's law states that the work required for crushing is proportional to The change in volume due to crushing None of these The size reduction ratio The new surface created The change in volume due to crushing None of these The size reduction ratio The new surface created ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations For spheres, volume shape factor is given by AD/V 2π(=2A/D²) π/6(=V/D³) π(=A/D²) AD/V 2π(=2A/D²) π/6(=V/D³) π(=A/D²) ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations The optimum moisture content in solids to be crushed/ground ranges from __________ percent. 3 to 4 8 to 10 15 to 20 10 to 15 3 to 4 8 to 10 15 to 20 10 to 15 ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Filtrate flow rate in case of a rotary drum vacuum filter (in which Rm < < Rc) is proportional to __________ and the cycle time (where, μ = filtrate viscosity Rm = filter medium resistance Rc = cake resistance ). √μ 1/μ 1/μ² 1/√μ √μ 1/μ 1/μ² 1/√μ ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations A 30% (by volume) suspension of spherical sand particles in a viscous oil has a hindered settling velocity of 4.44 μm/s. If the Richardson Zaki hindered settling index is 4.5, then the terminal velocity of a sand grain is 22.1 μm/s 0.90 μm/s 0.02 μm/s 1 μm/s 22.1 μm/s 0.90 μm/s 0.02 μm/s 1 μm/s ANSWER DOWNLOAD EXAMIANS APP
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