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Texas Waste Water Treatment Ch#09 Fixed Film Systems - Statistics
General Stats
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This quiz has been taken 84 times
81 since last reset
- The average score is 18 of 25
Answer Stats
| Question | Answer | % Correct |
|---|---|---|
| Which of the following does successful trickling filter operation depend on? | All of the above | 100%
|
| Which of the following is a basic elements of a trickling filter? | All of the above | 100%
|
| Filter operational problems include which of the following? | All of the above | 100%
|
| Which of the following adversely affects the operation of a rotating biological contactor? | All of the above | 100%
|
| Trickling filters may be classified as which of the following? | All of the above | 91%
|
| Filter ponding may be caused by which of the following? | All of the above | 91%
|
| Clogged orifices on influent distributor arms may be corrected by ________. | cleaning and flushing | 91%
|
| Which of the following materials should not go onto a trickling filter? | Large suspended solids | 91%
|
| The recirculation ratio of a trickling filter has an effect on which of the following? | All of the above | 82%
|
| To control odors at a trickling filter plant, the operator may do which of the following? | All of the above | 82%
|
| The biological growth on the disc should do which of the following? | All of the above | 82%
|
| The zoogleal mass on a filter is composed mainly of which of the following? | Bacteria AND Algae | 73%
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| Which of the following is true of filter media? | Must be durable and provide enough surface for bacterial growth | 73%
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| The rotating discs should be ________. | partially submerged in the wastewater | 73%
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| The RBC unit must be preceded by a ________. | primary clarifier or fine screen | 73%
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| Which of the following materials result from the stabilization of waste material as it passes through a trickling filter? | All of the above | 64%
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| Rotating biological contactors may be ________. | driven by electric motors or trapped air | 64%
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| Which of the following are units commonly used to measure the rate of organic loading? | lb. BOD/acre ft./day AND lb. BOD/1000 ft.^3 /day | 64%
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| Which of the following applies to zoogleal solids washed off a filter? | They are called sloughings and settle in final clarifier. | 64%
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| The test that best indicates the efficiency of a trickling filter is ________. | percent BOD removal | 55%
|
| Methods of controlling filter flies include which of the following? | Flood the filter | 45%
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| A buildup of solids in the tank of the contactors may be caused by ________. | poor primary clarification | 45%
|
| The underdrain system of a standard rate trickling filter should be ________. | designed to flow half-full | 36%
|
| Units commonly used to measure the rate of hydraulic loading include ________. | lb./ft./day | 36%
|
| Rotating biological contactors are usually covered for which of the following reasons? | Prevent algae growth on the media | 18%
|
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