In a size reduction crushing operation, feed size is 300 to 1500 mm while the product size is 100 to 300 mm. This is a case of the __________ crushing.

In a size reduction crushing operation, feed size is 300 to 1500 mm wh

1.	In a size reduction crushing operation, feed size is 300 to 1500 mm while the product size is 100 to 300 mm. This is a case of the __________ crushing.
A.	secondary
B.	fine
C.	primary
D.	ultrafine
Answer» D. ultrafine

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In a size reduction crushing operation, feed size is 300 to 1500 mm while the product size is 100 to 300 mm. This is a case of the __________ crushing.

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