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Texas Waste Water Treatment #13 Application of Lab Ctrl Determinations - Statistics
General Stats
- This quiz has been taken 54 times
- The average score is 11 of 16
Answer Stats
| Question | Answer | % Correct |
|---|---|---|
| Which of the following is the purpose for laboratory tests? | All of the above | 90%
|
| Which of the following tests are important in the control of an activated sludge process? | All of the above | 90%
|
| A flow-weighted “composite” sample is a ________. | combination of portions of samples collected at regular intervals and combined according to flow | 90%
|
| Total suspended solids are ________. | determined by filtration | 90%
|
| For anaerobic digesters, good sludge, supernatant, and gas production is realized at a pH of about ________. | 7.0 | 80%
|
| pH is important in the operation of which of the following? | All of the above | 80%
|
| Laboratory tests on an anaerobic digester may be used to determine ________. | digester loading AND quality of supernatant and digested sludge | 80%
|
| A low oxygen uptake rate might indicate ________. | toxic wastes, low DO, or low BOD | 80%
|
| Which of the following is the proper SVI range? | 70 to 150 | 70%
|
| Good activated sludge will contain which of the following? | Large numbers of rotifers AND a high percentage of stalked ciliates | 70%
|
| The BOD test is ________. | a major parameter in quality control | 50%
|
| “Grab” samples must be used to determine which of the following? | Chlorine residual | 50%
|
| Adequate chlorine residuals will ________. | destroy pathogenic organisms | 50%
|
| A low SVI may indicate ________. | sludge is settling too fast | 50%
|
| Laboratory tests on an anaerobic digester may be used to determine ________. | anaerobic digestion | 30%
|
| The test that best indicates the condition of an anaerobic digester is are ________. | volatile acid concentration | 30%
|
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