_______________ mill is normally used for grinding of talc?

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Dust collection efficiency of electrostatic precipitator can be as high as 99.9%. Maximum temperature and pressure of dust laden gas that can be cleaned in an electrostatic precipitator is respectively ?

A. 200°C and 5 atm B. 1000°C and 10 atm C. 500°C and 50 atm D. 1000°C and 500 atm...

Critical Speed (Nc) of a ball mill is given by (where R1 and R2 are radii of ball mill and the ball respectively) ?

A. Nc = (1/4π). √(g/R1 – R2) B. Nc = (1/2π). √(g/R1 – R2) C. Nc = (1/π). √(g/R1 – R2) D. Nc = (1/2π). √(R1 – R2/g)...

Bond crushing law_________________?

A. Calls for relatively less energy for the smaller product particles, than does the Rittinger law B. Is less realistic in estimating the power requirements of commercial crushers C. States that the work required to form particle of any size from very large feed is proportional to the square root of the volume to surface … Bond crushing law_________________?Read More...

Sphericity of pulverised coal is__________________?

A. 1 B. < 1 C. > 1 D. ∞...

Ball mill is used for__________________?

A. Crushing B. Coarse grinding C. Fine grinding D. Attrition...