Pick out the wrong statement:

Question

Options:

A . Magnetic separation method can be employed to treat both dry & wet ores

B . Reduction ratio in crushing operation is defined as the ratio of minimum feed size to the maximum product size

C . Gyratory crusher is used for coarse crushing

D . Screens are of stationary, moving and vibratory types

Answer: Option B

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More Questions on This Topic :

Question 1. For achieving maximum capacity of the ball mill, the ball charge should be equal to about __________ percent of the ball....equal to about __________ percent of the ball mill volume.

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Question 4. Separation of materials into products based on the difference of their sizes is called....

Question 5. For spheres, the specific surface shape factor is given by....

Question 6. For a non-spherical particle, the sphericity....

Question 7. Ultrafine grinders operate principally by....

Question 8. General crushing equation is given by following equation. Bond's crushing law is obtained by solving this equation for n....equation for n = __________ and feed of infinite size.

Question 9. Which of the following equations is Rittinger's crushing law ?(where P = power required by the machine, m = feed rate, k....= volume surface mean diameter of feed & product respectively.)

Question 10. About 2-3 hp, power per gallon of a thin liquid provides vigrous agitation in an agitator. 'Power number' in agitation i....in an agitator. 'Power number' in agitation is given by

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