Mechanical Operations The value of work index does not change materially from one equipment to another. If the value of work index determined for close circuit grinding is Wi, then the same for open circuit grinding will be 1.34 Wi 0.5 Wi 3.34 Wi Wi 1.34 Wi 0.5 Wi 3.34 Wi Wi ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Tank filter (e.g., Nutsch filter) is A high pressure filter Used for small scale filtration work A leaf filter A continuous filter A high pressure filter Used for small scale filtration work A leaf filter A continuous filter ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Arrange the following size reduction equipment in the decreasing order of the average particle size produced by each of them. Fluid energy mill, Ball mill, Jaw crusher Fluid energy mill, Jaw crusher, Ball mill Ball mill, Jaw crusher, Fluid energy mill Jaw crusher, Ball mill, Fluid energy mill Fluid energy mill, Ball mill, Jaw crusher Fluid energy mill, Jaw crusher, Ball mill Ball mill, Jaw crusher, Fluid energy mill Jaw crusher, Ball mill, Fluid energy mill ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations In screen analysis, the notation +5 mm/-10 mm means particles passing through 10 mm screen and retained on 5 mm screen 5 mm screen and retained on 10 mm screen Neither 5 mm nor 10 mm screen Both 5 mm and 10 mm screens 10 mm screen and retained on 5 mm screen 5 mm screen and retained on 10 mm screen Neither 5 mm nor 10 mm screen Both 5 mm and 10 mm screens ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Sphericity for a non-spherical particle is given by (where, V and S are volume and surface area respectively of one particle. and, D = equivalent diameter of particle). S/V V/D.S 6.V/D.S V/6D.S S/V V/D.S 6.V/D.S V/6D.S ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations For efficient grinding, ball mills must be operated At a speed more than the critical speed At a speed less than the critical speed At a speed equal to the critical speed With minimum possible small balls At a speed more than the critical speed At a speed less than the critical speed At a speed equal to the critical speed With minimum possible small balls ANSWER DOWNLOAD EXAMIANS APP
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