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 0.02 μm/s 0.90 μm/s 1 μm/s 22.1 μm/s 0.02 μm/s 0.90 μm/s 1 μm/s 22.1 μm/s ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Ore concentration by jigging is based on the difference in the __________ of the particles. Wettability Specific gravities None of these Shape Wettability Specific gravities None of these Shape ANSWER DOWNLOAD EXAMIANS APP
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 V.W. ρ 3.6 W.Dr.ρ 3.6 V.W.Dr/ρ 3.6 V.W.Dr.ρ 3.6 V.W. ρ 3.6 W.Dr.ρ 3.6 V.W.Dr/ρ ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Which of the following crushing laws is most accurately applicable to the fine grinding of materials ? Bond's crushing law Kick's law Rittinger's law None of these Bond's crushing law Kick's law Rittinger's law None of these ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Filter aid is used to Act as a support base for the septum Increase the rate of filtration Decrease the pressure drop Increase the porosity of the cake Act as a support base for the septum Increase the rate of filtration Decrease the pressure drop Increase the porosity of the cake ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations __________ centrifuge is the most suitable for separation of non-friable crystals. Tubular bowl Disc-bowl Perforated horizontal basket continuous Suspended batch basket Tubular bowl Disc-bowl Perforated horizontal basket continuous Suspended batch basket ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS