Mechanical Operations Ball mill is used for Crushing Fine grinding Coarse grinding Attrition Crushing Fine grinding Coarse grinding Attrition ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Trommels are revolving screens which normally operate in the range of __________ rpm. 40 - 50 43832 60 - 75 15 - 20 40 - 50 43832 60 - 75 15 - 20 ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations What is the usual value of angle of nip for crushing of ordinary rock in smooth steel crushing rolls? 32° 46° 40° 16° 32° 46° 40° 16° ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations A sand mixture was screened through a standard 10-mesh screen. The mass fraction of the oversize material in feed, overflow and underflow were found to be 0.38, 0.79 and 0.22 respectively. The screen effectiveness based on the oversize is 0.62 0.5 0.58 0.68 0.62 0.5 0.58 0.68 ANSWER DOWNLOAD EXAMIANS APP
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 Wi 0.5 Wi 3.34 Wi 1.34 Wi Wi 0.5 Wi 3.34 Wi 1.34 Wi ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Theoretical capacity of crushing rolls in tons/hr is given by (where, V = peripherial velocity, m/sec. W = width of rolls, m Dr = distance between rolls ρ = density of material to be crushed, kg/m³ here, V =πN.D where, N = speed of the rolls in rotation per second (rps) D = diameter of rolls, m) 3.6 V.W. ρ 3.6 W.Dr.ρ 3.6 V.W.Dr.ρ 3.6 V.W.Dr/ρ 3.6 V.W. ρ 3.6 W.Dr.ρ 3.6 V.W.Dr.ρ 3.6 V.W.Dr/ρ ANSWER DOWNLOAD EXAMIANS APP
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