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25 Cards in this Set
- Front
- Back
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1. Septic wastewater due to anaerobic conditions is:
A. gray-black B. gray-green C. green-black D. light green |
1. Septic wastewater due to anaerobic conditions is:
A. gray-black |
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2. The solids that easily drop out of wastewater are:
A. Organic solids of human origin. B. Solids that come from infiltration. C. Septic solids D. Grit and settleable solids |
2. The solids that easily drop out of wastewater are:
D. Grit and settleable solids |
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3. A lagoon which is aerobic near the surface but is anaerobic at lower levels is called:
A. A facultative lagoon B. An anaerobic lagoon C. A complete-mix aerated lagoon D. No answers apply |
3. A lagoon which is aerobic near the surface but is anaerobic at lower levels is called:
A. A facultative lagoon |
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4. A total containment lagoon cell is one that:
A. Is covered to keep out sun and rain B. The entire contents are discharged at one time C. Evaporation from the surface is equal to, or greater than total inflow and rainfall D. The contents are entirely of industrial origin |
4. A total containment lagoon cell is one that
C. Evaporation from the surface is equal to, or greater than total inflow and rainfall |
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5. The oxygen in an aerated lagoon cell is:
A. Derived completely from the air by wind and wave action B. Obtained primarily by mechanical means C. Formed by aerobic bacteria D. Generated at the benthic layer by anaerobes |
5. The oxygen in an aerated lagoon cell is:
B. Obtained primarily by mechanical means |
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6. Which of the following is not a term used to refer to a conventional wastewater treatment lagoon?
A. Oxidation pond B. Facultative lagoon C. Stabilization pond D. Aerobic lagoon |
6. Which of the following is not a term used to refer to a conventional wastewater treatment lagoon?
D. Aerobic lagoon |
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7. The effluent from a conventional lagoon should be withdrawn:
A. Off the surface B. Six to eighteen inches below the surface C. Near the bottom D. Intermittently |
7. The effluent from a conventional lagoon should be withdrawn:
B. Six to eighteen inches below the surface |
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8. A pathogenic bacteria is:
A. The same as a coliform B. Another name for a virus C. Any bacteria that causes disease D. Any bacteria that is resistant to chlorine |
8. A pathogenic bacteria is:
C. Any bacteria that causes disease |
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9. Chlorine for disinfection can be obtained from which of these sources?
A. Calcium hypochlorite B. Sodium hypochlorite C. Liquified chlorine gas D. All answers apply |
9. Chlorine for disinfection can be obtained from which of these sources?
D. All answers apply |
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10. To accomplish effective disinfection with chlorine, certain conditions must be observed. One of them is that:
A. A massive dose of chlorine must be used B. Sunshine must be present C. A chlorine contact time must be provided D. The temperature must be at least 60 degrees F |
10. To accomplish effective disinfection with chlorine, certain conditions must be observed. One of them is that:
C. A chlorine contact time must be provided |
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11. Landfilling involves the depositing of stabilized, dewatered sludge into an approved sanitary landfill. A component required for a landfill to be approved to receive sludge would be:
A. Leachate collection B. Monitoring wells C. Impermeable liners D. All answers apply |
11. Landfilling involves the depositing of stabilized, dewatered sludge into an approved sanitary landfill. A component required for a landfill to be approved to receive sludge would be:
D. All answers apply |
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12. The time of day when you would expect the lowest sewage flow rate is:
A. About midnight B. About 3 to 4 PM C. About 5 to 6 AM D. Flow is nearly constant all day and night |
12. The time of day when you would expect the lowest sewage flow rate is:
C. About 5 to 6 AM |
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13. A sharp crested weir is one which:
A. Has a knife edged crest B. Must be calibrated in place C. Can be easily changed for different flow rates D. Must be made of planks |
13. A sharp crested weir is one which
A. Has a knife edged crest |
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14. The lack of unpleasant odor in a manhole, sump, etc. does not always mean that no dangerous gases are present since:
A. Some dangerous gases have no odor B. Oxygen may still be lacking C. Some gases deaden the sense of smell D. All answers apply |
14. The lack of unpleasant odor in a manhole, sump, etc. does not always mean that no dangerous gases are present since:
D. All answers apply |
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15. Wastewater is discharged into a sewer from:
A. Residential users B. Commercial users C. Industries and institutions D. All answers apply |
15. Wastewater is discharged into a sewer from:
D. All answers apply |
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16. Water seal connections to sewage pumps should not connect directly to the city water supply because:
A. City water often contains sand B. City water pressure is too high and may blow the seal C. Sewage may be drawn back into the water system D. Dry seals work better. |
16. Water seal connections to sewage pumps should not connect directly to the city water supply because:
C. Sewage may be drawn back into the water system |
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17. Centrifugal pumps are able to move liquids by using a rotating:
A. Piston B. Diaphragm C. Impeller D. Seals |
17. Centrifugal pumps are able to move liquids by using a rotating:
C. Impeller |
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18. A thorough record keeping system:
A. Can provide data upon which to make decisions. B. May be needed in lawsuits or enforcement proceedings. C. Is usually indicative of a well operated treatment facility. D. All answers apply |
18. A thorough record keeping system
D. All answers apply |
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19. Which of the following is not a major category of records at a wastewater facility?
A. Personnel records B. Performance records C. Immunization records |
19. Which of the following is not a major category of records at a wastewater facility?
C. Immunization records |
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20. If you must use a boat to check the operation of floating aerators, you should always:
A. Wear a heavy raincoat to keep spray off B. Wear a life jacket C. Wear heavy rubber boots D. No answer applies |
20. If you must use a boat to check the operation of floating aerators, you should always
B. Wear a life jacket |
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21. When a facility uses gas chlorine for disinfection, which of these rules should be observed?
A. A self-contained breathing apparatus should be on hand B. All chlorine cylinders must be chained in a secure position C. A "buddy" should be present when changing cylinders D. All answers apply |
21. When a facility uses gas chlorine for disinfection, which of these rules should be observed?
D. All answers apply |
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22. Laboratory data at small wastewater facilities:
A. Is usually not necessary B. Should be generated on site C. May be more economically feasible if determined by a contract laboratory. D. Should be sent to the Mayor's office to be filed |
22. Laboratory data at small wastewater facilities
C. May be more economically feasible if determined by a contract laboratory |
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23. The BOD of sewage determines the ppm of oxygen required:
A. During stabilization of decomposable organic matter by aerobic bacterial action B. To produce an equilibrium between the oxygen of the sewage and atmospheric oxygen C. To unite chemically with the inorganic matter present in the sample D. For the oxidation of sulfites and thiosulfates to sulfates |
23. The BOD of sewage determines the ppm of oxygen required:
A. During stabilization of decomposable organic matter by aerobic bacterial action |
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24. The money to operate and maintain a wastewater treatment plant is supplied by:
A. The State Department of Environmental Quality B. An EPA Grant C. Local ratepayers D. All answers apply |
24. The money to operate and maintain a wastewater treatment plant is supplied by:
C. Local ratepayers |
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25. Many NPDES permits limit the amount of ammonia nitrogen that can be discharged into a stream because:
A. Ammonia exerts an oxygen demand in the stream B. Ammonia can be toxic to aquatic life C. Ammonia reacts with chlorine which can interfere with disinfection D. All answers apply |
25. Many NPDES permits limit the amount of ammonia nitrogen that can be discharged into a stream because:
D. All answers apply |
