Mechanical Operations In froth floatation, chemical agent added to cause air adherence is called Modifier Activator Frother Collector Modifier Activator Frother Collector ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations In filtration, the use of 'filter aid' helps in Deplugging the filter medium Accelerating the rate of filtration Reducing the filtration pressure Enhancing the cake porosity in case of a dense impermeable cake Deplugging the filter medium Accelerating the rate of filtration Reducing the filtration pressure Enhancing the cake porosity in case of a dense impermeable cake ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Which of the following grinding mills has the horizontally arranged rods as the grinding elements thereby delivering more uniform granular products with minimum fines? Tube mill Compartment mill Pebble mill Rod mill Tube mill Compartment mill Pebble mill Rod mill ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations In a mixer, the quantity, (v. L/D) is termed as __________ number(where, v = longitudinal velocity of material, L = length of the mixer, D = diffusivity in axial mixing). Brinkman Peclet Schmidt Weber Brinkman Peclet Schmidt Weber ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Actual operating speed of a ball mill may vary from 65 to 80% of the critical speed. Which of the following duties would require the ball mill to be operated at maximum percentage of critical speed? Dry grindng of large particles in un-baffed mills Wet grinding in low viscous suspension Dry grinding of large particles (upto 1.25 cms) Wet grinding in high viscous suspension Dry grindng of large particles in un-baffed mills Wet grinding in low viscous suspension Dry grinding of large particles (upto 1.25 cms) Wet grinding in high viscous suspension ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Height of liquid in agitation tank is normally maintained equal to the tank diameter. However, if the tank is too tall and a large liquid hold up is desired, then two or more impellers mounted on the same shaft may be used. The clearance between the tank bottom and the bottom most impeller should be about (where, D = impeller diameter) 2 D 0.5 D D 1.5 D 2 D 0.5 D D 1.5 D ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS