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?
Correct answer: C. Primary
- A. Secondary
- B. Fine
- C. Primary
- D. Ultrafine
Explanation
Primary crushing reduces very large feed, commonly about 300 to 1500 mm, to products roughly 100 to 300 mm. Secondary crushing receives the smaller product from primary crushers and reduces it further.
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