| Question - 1 of 10 | a | b | c | d |
| Where in the plant will an organic overload cause problems ? | The settling tank | The chlorination contact tank | The aeration tank | The sludge holding tank |
| Question - 2 of 10 | a | b | c | d |
| Which operation control test would give the best indications of an organic overload ? | The pH test | The dissolved oxygen test | The residual chlorine test | There is no test which will indicate an organic overload |
| Question - 3 of 10 | a | b | c | d |
| During low flow periods, it is desirable to maintain the dissolved oxygen concentration at a level ; | 2.0 - 3.0 mg / L | 0.1 - 0.2 mg / L | 1.0 - 2.0 mg / L | Over 3.0 mg / L |
| Question - 4 of 10 | a | b | c | d |
| The minimum amount of dissolved oxygen that should exists during peak flow period is ; | 0.5 mg / L | 0.1 mg / L | 0.2 mg / L | 0.4 mg / L |
| Question - 5 of 10 | a | b | c | d |
| What action should you take when an organic overload occurs ? | The water spray foam control system should not be operated | Increase the speed of the air blower to provide more air to the aeration tank | Discontinue using surface skimmers | Decrease the speed of the air blower to provide less air to the aeration tank |
| Question - 6 of 10 | a | b | c | d |
| If an organic overload occurs without a noticable increase in daily flow, the problem may be due to ; | Storm water infiltration into sewer pipes | Industrial organic waste being discharged into the sewer | Insufficient aeration | Excessive aeration |
| Question - 7 of 10 | a | b | c | d |
| Another type of overload that you may experience is a temporary hydraulic overload and will cause problems that may be noticed first in which unit of the plant ? | The settling tank | The chlorine contact tank | The aeration tank | The sludge holding tank |
| Question - 8 of 10 | a | b | c | d |
| A hydraulic overload would have what effect on the plant ? | Septic condition | Will have no effect on the plant | Could wash out practically all of the sludge | Excessive foaming |
| Question - 9 of 10 | a | b | c | d |
| What action would help prevent this ? | Discontinue using surface skimmer | Increase the speed of the air blower to provide more air to the aeration tank | Return all sludge possible | There is no need to take any action |
| Question - 10 of 10 | a | b | c | d |
| Another recommended action is ; | The water spray foam control system should not be operated | Increase the speed of the air blower to provide more air to the aeration tank | Return all sludge possible | There is no need to take any action |
