Mechanical Operations Which of the following size reduction equipments employs mainly attrition for ultrafine grinding? All of these Fluid energy mill Micronizer Jet mills All of these Fluid energy mill Micronizer Jet mills 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 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 Dry grindng of large particles in un-baffed mills Wet grinding in low viscous suspension ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations The most common filter aid is Calcium silicate Sodium carbonate Diatomaceous earth Silica gel Calcium silicate Sodium carbonate Diatomaceous earth Silica gel 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/√μ 1/μ² √μ 1/μ 1/√μ 1/μ² ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations The critical speed of a trommel (N) is related to its dia (D) as N ∝ 1/D N ∝ √D N ∝ 1/√D N ∝ D N ∝ 1/D N ∝ √D N ∝ 1/√D N ∝ D ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations The main size reduction operation in ultrafine grinders is Cutting Impact Compression Attrition Cutting Impact Compression Attrition ANSWER DOWNLOAD EXAMIANS APP
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