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 low viscous suspension Dry grinding of large particles (upto 1.25 cms) Dry grindng of large particles in un-baffed mills Wet grinding in high viscous suspension Wet grinding in low viscous suspension Dry grinding of large particles (upto 1.25 cms) Dry grindng of large particles in un-baffed mills Wet grinding in high viscous suspension ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Horsepower required for a roll crusher is directly proportional to its Neither A nor B Capacity Both A & B Reduction ratio Neither A nor B Capacity Both A & B Reduction ratio ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations The crushed material received for separation is called feed or Middling Concentrate Tailing Heading Middling Concentrate Tailing Heading ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Washability curve based on float and sink test enables an assessment to be made of the possibility of cleaning a coal fraction based on the Differential wettability Volatile matter content Size Density separation Differential wettability Volatile matter content Size Density separation ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Range of compressibility co-efficient of the commercial compressible cake obtained in filtration operation is 0.1 to 0.3 0.2 to 0.8 0.2 to 0.4 0.01 to 0.1 0.1 to 0.3 0.2 to 0.8 0.2 to 0.4 0.01 to 0.1 ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Grindability of a material does not depend upon its Toughness Hardness Elasticity Size Toughness Hardness Elasticity Size ANSWER DOWNLOAD EXAMIANS APP
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