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9. Which process is excluded from the working cycle of a common rapid filtration: A filtration B. washing c. assistant washing D. change after media 10. What is the filtration mode of a conventional rapid

9. Which process is excluded from the working cycle of a common rapid filtration: A filtration B. washing c. assistant washing D. change after media 10. What is the filtration mode of a conventional rapid

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
Problem 1LR
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9. Which process is excluded from the working cycle of a common rapid filtration: A. filtration B. washing c. assistant washing D. change after media 10. What is the filtration mode of a conventional rapid filter tank? A. constant water head, constant velocity B. varied water head, constant velocity c.constant water head, varied velocity D. varied water head, varied velocity 11. For strong-acid cation exchange resin, which ion will be firstly exchanged in natural water? A Al B. Ca c. Mg D. Na
Transcribed Image Text:9. Which process is excluded from the working cycle of a common rapid filtration: A. filtration B. washing c. assistant washing D. change after media 10. What is the filtration mode of a conventional rapid filter tank? A. constant water head, constant velocity B. varied water head, constant velocity c.constant water head, varied velocity D. varied water head, varied velocity 11. For strong-acid cation exchange resin, which ion will be firstly exchanged in natural water? A Al B. Ca c. Mg D. Na
14. In ultraviolet disinfection, the effective wave is in which wave band? A. UV-A B. UV-B c. UV-C D. UV-D 1s. How much water in clean water reservoir for disinfection is demanded to meet the requirement of contact time: more than A. 70% H. 80% C. 90% D. 95%
Transcribed Image Text:14. In ultraviolet disinfection, the effective wave is in which wave band? A. UV-A B. UV-B c. UV-C D. UV-D 1s. How much water in clean water reservoir for disinfection is demanded to meet the requirement of contact time: more than A. 70% H. 80% C. 90% D. 95%
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