| # | What is distillate? | A substance that cannot be seperated into substances. | The portion of a sample that is left after distillation. | The portion of a sample that is lost during distillation. | The sample before it is distilled. | none of the above. | 2
|
|---|
| 1 | First aid for first-degree burns is to | bandage tightly. | cover liberally with a salve. | immerse in warm water. | submerge in burned area in cold water. | none of the above. | 4 |
| 2 | Which of these ph readings indicates an acidic wastewater? | 3 | 7 | 9 | 12 | none of the above. | 1 |
| 3 | A composite sample will give a(n) | even color. | high ph. | instantaneous sample. | representative sample. | none of the above. | 4 |
| 4 | What test is not run on the influent sample of a wastewater treatment plant ? | BOD. | fecal coliform. | suspended solids. | ph. | none of the above. | 2 |
| 5 | Improper handling, storing or preparing solutions of chemicals can cause | burns. | explosions. | loss of eye sight. | all of the above. | none of the above. | 4 |
| 6 | The quantity of volatile solids in the content of the sludge is an indirect measure of the | amount of the sample that will evaporate upon standing. | ~FOOD~ available for the bacteria in the digester. | number of bacteria in the digester. | all of the above. | none of the above. | 2 |
| 7 | An incubator for the BOD test should be controlled at ____ C. | 15 | 20 | 25 | 30 | none of the above. | 2 |
| 8 | The ash content is the same as the | difference in raw sludge and the sludge after air drying. | inorganic solids. | organic solids. | volatile solids. | none of the above. | 3 |
| 9 | The weight of a chemical compound is 1/8 of the total weight of a chemical solution. The percent, by weight, of the chemical in solution is | 6.4. | 8.3. | 10.5. | 12.5. | none of the above. | 4 |
| 10 | A chemical analysis indicates the following substances were present: HCO3 , SO4 , CO3. If you are interested in determining the alkalinity, you would ignore the concentration of which substance? | CO3. | HCO3. | SO4. | all of the above. | none of the above. | 5
|
