Mechanical Operations The speed of a rotary drum vacuum filter may be about __________ rpm. 100 1 50 500 100 1 50 500 ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Agglomeration of individual particles into clusters (flocs) is called flocculation. To prevent flocculation, the most commonly used dispersing agents are Silicates & phosphates Carbonates Bi-carbonates Sulphates Silicates & phosphates Carbonates Bi-carbonates Sulphates ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Temperature of the product during ultrafine grinding Increases Decreases May increase or decrease ; depends on the material being ground Remains constant Increases Decreases May increase or decrease ; depends on the material being ground Remains constant 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? Wet grinding in high viscous suspension Dry grindng of large particles in un-baffed mills Dry grinding of large particles (upto 1.25 cms) Wet grinding in low viscous suspension Wet grinding in high viscous suspension Dry grindng of large particles in un-baffed mills Dry grinding of large particles (upto 1.25 cms) Wet grinding in low viscous suspension ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Which of the following is not a non-metalliferous mineral? Fluorspar Cassiterrite Quartz Calcite Fluorspar Cassiterrite Quartz Calcite ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations The process by which fine solids is removed from liquids is termed as Classification Sedimentation Flocculation Decantation Classification Sedimentation Flocculation Decantation ANSWER DOWNLOAD EXAMIANS APP
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