In a size reduction crushing operation, the feed size is 10 to 50 mm, while the product size is 2 to 10 mm. This is a case of __________ crushing.

In a size reduction crushing operation, the feed size is 10 to 50 mm,

1.	In a size reduction crushing operation, the feed size is 10 to 50 mm, while the product size is 2 to 10 mm. This is a case of __________ crushing.
A.	primary
B.	secondary
C.	fine
D.	ultrafine
Answer» D. ultrafine

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In a size reduction crushing operation, the feed size is 10 to 50 mm, while the product size is 2 to 10 mm. This is a case of __________ crushing.

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