A&B Test Questions - Florida Rural Water Association

8. A random listing of procedures used to start up a coagulation flocculation process is listedbelow. Place the procedure in the proper order.1. Start chemical feed system2. Run a jar test on the raw water3. Turn flash mixer on4. Start sampling pumps5. Open raw water inlet gate6. Check condition of all mechanical equipment7. Begin disinfection8. Observe floc formationa. 5, 2, 1, 7, 3, 4, 8, 6b. 6, 2, 5, 1, 7, 3, 4, 8c. 5, 6, 2, 1, 7, 3, 4, 8d. 6, 5, 1, 2, 7, 3, 4, 8e. 6, 2, 5, 1, 4, 7, 3, 89. You have adverse changes in the raw water temperature. It would be best to adjust the flashmixer but this is not possible in your plant. Which action below would be the mostappropriate?a. Reduce the amount of coagulant chemicalb. Increase the amount of coagulant chemicalc. Increase the pH with soda ashd. Add an ionic filter aid chemical polymere. Adjust the mixing intensity of the flocculatorTROUBLESHOOTINGGUIDE SECTION10. You have observed that the floc as it enters the flocculation basin is not well dispersedthroughout the flow. What is the most likely problem?a. No problem, it will ix as it gets to the sedimentation basinb. Flash mixer too slowc. Coagulant dose too highTROUBLESHOOTINGd. Feed rate too highGUIDE SECTIONe. Polymer addition needs to be increased43