Which of the following is the hardest material ?

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Which of the following mechanical conveyors does not come under the division „carriers‟ ?

A. Belt conveyor B. Bucket elevator C. Screw conveyor D. Apron conveyor...

Which one is a filter aid ?

A. Canvas fabric B. Diatomaceous earth C. Calcined lime D. None of these...

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 ?

A. Cresylic acid B. Copper sulphate C. Calcium carbonate D. Sodium carbonate...

As per Taggart’s formula, the capacity (kg/hr) of Jaw & Gyratory crushers (for gapes of 10 to 60 cms) is equal to (where, L = Length of feed opening, cms S = Maximum width of discharge opening, cms) ?

A. LS B. 93 LS C. 250 LS D. √(LS)...

The crushed material received for separation is called feed or_________________?

A. Tailing B. Heading C. Concentrate D. Middling...