Mechanical Operations For a turbine agitated and baffled tank, operating at low Reynold's number (based on impeller diameter), the power number (Np) varies with NRe as Np ∝ √NRe Np ∝ NRe Np → constant Np ∝ 1/NRe Np ∝ √NRe Np ∝ NRe Np → constant Np ∝ 1/NRe ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Which of the following crushing laws is most accurately applicable to the fine grinding of materials ? Rittinger's law Bond's crushing law None of these Kick's law Rittinger's law Bond's crushing law None of these Kick's law ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Carbon black is pulverised in a Ball mill Gyratory crusher Hammer crusher Roll crusher Ball mill Gyratory crusher Hammer crusher Roll crusher ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Ultracentrifuges running at speeds upto 100000 rpm is normally used for the Dewaxing of lubricating oil Separation of isotopes based on their density or molecular weights difference Concentration of rubber latex Separation of cream from milk Dewaxing of lubricating oil Separation of isotopes based on their density or molecular weights difference Concentration of rubber latex Separation of cream from milk ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations In the cyclone separator used for separation of dust from dust laden gas, the gas Is admitted tangentially at high velocity Enters the cyclone from the top Develops a helical motion inside the chamber Both B and C Is admitted tangentially at high velocity Enters the cyclone from the top Develops a helical motion inside the chamber Both B and C 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. ρ 3.6 V.W.Dr/ρ 3.6 V.W.Dr.ρ 3.6 W.Dr.ρ 3.6 V.W. ρ 3.6 V.W.Dr/ρ 3.6 V.W.Dr.ρ 3.6 W.Dr.ρ ANSWER DOWNLOAD EXAMIANS APP
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