Tires

Quiz

1. How much of a difference in production rate can primary selection make up?

2. Name one of the five factors considered in the correct selection of a primary crusher.

3. What are the two basic types of primary crushers?

4. How do you determine the maximum feed size a primary crusher can accept?

5. True or false? Portable plants are easier to permit than stationary plants, making them more desirable.

6. What is the major advantage of portable plants?

7. Why is the crushing industry moving toward larger primary units?

8. Why is the horizontal-type screen preferred on portable applications?

9. What allowed a true portable plant to be made with a jaw crusher in certain sizes?

10. What is the most popular feeder for primary crushers?

Quiz Answers

1. Up to 30 percent

2. Among them, maximum feed size the crusher is expected to accept; product size allowed to be fed to the secondary crushers; production rate required yielding correct product size; abrasive content and general analysis of the aggregate to be crushed; availability of maintenance for the crusher

3. Jaw crusher and impact crusher

4. By analyzing shot pattern, drill size and power factor used in shooting the quarry face

5. True

6. They have the ability to locate the plant right at the deposit and the ease of changing locations to stay close to the deposit being processed

7. To eliminate problems with oversize at the primary crusher

8. With travel height being crucial, it has a low profile and increased efficiency per sq. ft.

9. The advent of the overhead eccentric single-toggle jaw crusher

10. The vibrating grizzly feeder