Review For Wasted Water
[Collection Exam]
with correct answers | Graded A+ |
Updated Version
QUESTIONS AND ANSWERS
1. 60 gallons per hour is equal to. ANSWER - 1 gallon per minute.
2. The slope of a sewer is measured by the difference in. ANSWER - Invert elevations over
a length of pipe
3. An air gap can be used to. ANSWER - Prevent backflow of waste water into a drinking
water supply
4. A cross connection is a potable water pipe connected to a. ANSWER - Supply of
questionable origin.
5. Wastewater carried in to a collection system may come from. ANSWER - Inflow
6. When using any hydraulic sewer cleaning method care must be taken by the operator not
to. ANSWER - Cause flooding in home and businesses.
7. Disease producing bacteria are. ANSWER - Called Pathogenic.
8. A man hole with the center great is normally used for. ANSWER - Storm sewer.
9. A pig would be used as a. ANSWER - Reamer.
10. A minimum scouring velocity of 2ft/sec in sewers is necessary. ANSWER - So that
solids won't build up in a sewer and reduce flow.
, 11. A cross-connection is best defined as. ANSWER - A potable water supply connected to
a potential source of pollution.
12. When dealing with collection systems, I&I refers to. ANSWER - Infiltration and Inflow
13. Corrosion of sewer pipes maybe caused by. ANSWER - Acids in water
14. In a collection system, waste water that contains NO "FREE" or dissolved oxygen is
referred to as. ANSWER - Anaerobic .
15. The primary reason why it is important not to have cross connections of sewer with
water supply systems is. ANSWER - Possible water contamination .
16. A pig would most likely be used in the cleaning of a. ANSWER - Force main.
17. Flow rates can be expressed in. ANSWER - Units of MGD [L/S] = Million gallons
per day 1.547 cu ft/s
18. A sewer man hole is. ANSWER - An opening in a sewer provided for the purpose of
access.
19. The crown of a sewer pipe is called. ANSWER - The top.
20. The primary purpose of wastewater disinfection is. ANSWER - Prevention of receiving
water contamination.
21. One million gallons per day is equal to. ANSWER - 700 gallons per minute.
22. What should be considered as the scouring velocity of sanitary sewer. ANSWER - 2
ft/second
23. A manhole barrel is referred to as. ANSWER - The cylindrical section between the cone
and shelf.
[Collection Exam]
with correct answers | Graded A+ |
Updated Version
QUESTIONS AND ANSWERS
1. 60 gallons per hour is equal to. ANSWER - 1 gallon per minute.
2. The slope of a sewer is measured by the difference in. ANSWER - Invert elevations over
a length of pipe
3. An air gap can be used to. ANSWER - Prevent backflow of waste water into a drinking
water supply
4. A cross connection is a potable water pipe connected to a. ANSWER - Supply of
questionable origin.
5. Wastewater carried in to a collection system may come from. ANSWER - Inflow
6. When using any hydraulic sewer cleaning method care must be taken by the operator not
to. ANSWER - Cause flooding in home and businesses.
7. Disease producing bacteria are. ANSWER - Called Pathogenic.
8. A man hole with the center great is normally used for. ANSWER - Storm sewer.
9. A pig would be used as a. ANSWER - Reamer.
10. A minimum scouring velocity of 2ft/sec in sewers is necessary. ANSWER - So that
solids won't build up in a sewer and reduce flow.
, 11. A cross-connection is best defined as. ANSWER - A potable water supply connected to
a potential source of pollution.
12. When dealing with collection systems, I&I refers to. ANSWER - Infiltration and Inflow
13. Corrosion of sewer pipes maybe caused by. ANSWER - Acids in water
14. In a collection system, waste water that contains NO "FREE" or dissolved oxygen is
referred to as. ANSWER - Anaerobic .
15. The primary reason why it is important not to have cross connections of sewer with
water supply systems is. ANSWER - Possible water contamination .
16. A pig would most likely be used in the cleaning of a. ANSWER - Force main.
17. Flow rates can be expressed in. ANSWER - Units of MGD [L/S] = Million gallons
per day 1.547 cu ft/s
18. A sewer man hole is. ANSWER - An opening in a sewer provided for the purpose of
access.
19. The crown of a sewer pipe is called. ANSWER - The top.
20. The primary purpose of wastewater disinfection is. ANSWER - Prevention of receiving
water contamination.
21. One million gallons per day is equal to. ANSWER - 700 gallons per minute.
22. What should be considered as the scouring velocity of sanitary sewer. ANSWER - 2
ft/second
23. A manhole barrel is referred to as. ANSWER - The cylindrical section between the cone
and shelf.
