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7. Briefly explain the function of the balancing disc when dealing with multi- stage centrifugal pumps.
8. State the purpose of the volute housing used in pumps. 9. Briefly explain how suction is obtained in a centrifugal pump. 10. In your own words, describe the operation of a gear pump. 11. Define the term“centrifugal force” as it applies to centrifugal pumps. 12. Briefly describe the different types of impellers. 13. List the advantages of centrifugal pumps over reciprocating pumps. 14. Mention the difference between single and double-acting pumps.
15. With the aid of simple drawings, explain the difference between a pump piston and a pump plunger.