Mechanical Operations For efficient grinding, ball mills must be operated At a speed equal to the critical speed With minimum possible small balls At a speed less than the critical speed At a speed more than the critical speed At a speed equal to the critical speed With minimum possible small balls At a speed less than the critical speed At a speed more than the critical speed 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 0.02 μm/s 1 μm/s 0.90 μm/s 22.1 μm/s 0.02 μm/s 1 μm/s 0.90 μm/s ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations The specific cake resistance for incompressible sludges is (where ΔP = pressure drop over cake) ∝ ΔP ∝ 1/ ΔP Independent of ΔP ∝ √ΔP ∝ ΔP ∝ 1/ ΔP Independent of ΔP ∝ √ΔP ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Apron conveyors are used for Heavy loads & long runs None of these Heavy loads & short runs Small loads & long runs Heavy loads & long runs None of these Heavy loads & short runs Small loads & long runs ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations The sphericity of a solid particle of cubical shape is π/3 (π/6)1/2 (π/6)1/3 π π/3 (π/6)1/2 (π/6)1/3 π ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Range of compressibility co-efficient of the commercial compressible cake obtained in filtration operation is 0.2 to 0.4 0.1 to 0.3 0.2 to 0.8 0.01 to 0.1 0.2 to 0.4 0.1 to 0.3 0.2 to 0.8 0.01 to 0.1 ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS