Mechanical Operations A screen is said to be blinded, when the Screen capacity is abruptly increased Screen is plugged with solid particles Oversizes are present in undersize fraction Undersizes are retained in oversize fraction Screen capacity is abruptly increased Screen is plugged with solid particles Oversizes are present in undersize fraction Undersizes are retained in oversize fraction ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Separation of materials into products based on the difference of their sizes is called Classification Sizing Sorting Flocculation Classification Sizing Sorting Flocculation ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Activators are those chemicals which help buoying up one mineral in preference to the other in the froth floatation process. Which of the following is an activator? Sodium carbonate Copper sulphate Cresylic acid Calcium carbonate Sodium carbonate Copper sulphate Cresylic acid Calcium carbonate ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Vibrating screens are used for handling large tonnages of materials. The vibrating motion is imparted to the screening surface by means of Unblanced fly wheels Either A, B or C Cams or eccentric shafts Electromagnets Unblanced fly wheels Either A, B or C Cams or eccentric shafts Electromagnets ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations A centrifugal filtration unit operating at a rotational speed of w has inner surface of the liquid (density ρL) located at a radial distance R from the axis of rotation. The thickness of the liquid film is δ and no cake is formed. The initial pressure drop during filtration is ½w² . R² . ρL ½w² . δ² . ρL ½w² . R . ρL(R + 2δ) ½w² . δρL (2R + δ) ½w² . R² . ρL ½w² . δ² . ρL ½w² . R . ρL(R + 2δ) ½w² . δρL (2R + δ) ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations According to Taggart's rule for selecting between a gyratory crusher and a jaw crusher; the later should be used, if the hourly tonnage to be crushed divided by the square of the gape expressed in cm is less than 1.84 0.0184 0.00184 0.184 1.84 0.0184 0.00184 0.184 ANSWER DOWNLOAD EXAMIANS APP
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