Which of the following rod mill is widely used in mining industry with the principal function is to convert crushing-plant product into ball mill feed introduced through one trunnion and discharges through the other?

Which of the following is the approximate conversion factor for sieve size to projected diameter in microscopic procedure?

A. 0.44

B. 0.84

C. 0.94

D. 1.4

What is the maximum feed size in secondary crusher?

A. 5 cm

B. 15 cm

C. 30 cm

D. > 60 cm

A separation dependent on optical and radioactive properties is called

A. froth floatation

B. sorting

C. gangue clearance

D. crushing

What advantage you will get if it is known that data obtained from the material usually yields a straight line point?

A. it shows highly skewed distribution

B. burden on routine analysis would be less and relatively few sieves will be needed to check the features of size distribution

C. the linear ordinates avoids significant percentage oversize or undersize

D. this is the only numerical parameter that helps visualizing the relative frequency of occurrence of various sizes present in the material