Waste Water Support Systems

Front 1

1. Of the following devices, which is used for measuring pressurized wastewater flow?

Back 1

Magnetic flow meter.

Front 2

2. How much air pressure will be required to overcome the water pressure in a pressure sensing controller, for every foot (meter) of water rise in a wet well?

Back 2

0.43 psi/ft (9.79kPa/m)

Front 3

3. Which of the following is NOT a type or component of pump control systems used at wastewater lift stations?

Back 3

Bourses nozzles.

Front 4

4. A wastewater pump station is designed to?

Back 4

Lift wastewater.

Front 5

5. Manhole covers are normally heavy

Back 5

To prevent vandalism.

For public safety.

To support vehicular traffic.

Front 6

6. The difference between the elevations of the water surfaces in a wet well and at pump discharge is?

Back 6

The static head.

Front 7

7. A bubbler tube would most likely be found in?

Back 7

A pump station wet well.

Front 8

8. Corrosion of metal in lift stations can be controlled by using?

Back 8

Sacrificial metals.

Front 9

9. Manholes are normally located at?

Back 9

Each change in direction of the sewer.

Each change in grade.

Each change in the size of pipe.

Front 10

10. Telemetry is most commonly associated with?

Back 10

Communication in an alarm system.

Front 11

11. Grit chambers are designed to remove what from water?

Back 11

Inorganic material such as sand and cinders.

Front 12

12. A wastewater treatment process would NOT be adversely affected by?

Back 12

Flows with a pH of 7.

Front 13

13. A wet well is a?

Back 13

Holding tank.

Front 14

14. Float and electrode switches should be checked at least once a week to see that?

Back 14

Controls respond to changing water levels.

Front 15

15. The type of flow meter most commonly found in pump stations is the?

Back 15

Venturi meter.

Magnetic flow meter.

Parshall flume.

Front 16

16. The indicator organism normally used for determination of pollution of water are?

Back 16

Coliforms.

Front 17

17. Lift stations may be required in wastewater collection systems when?

Back 17

The topography is poor for gravity flow.

Front 18

18. The rates of flow through a Parshall flume are determined by measurement of?

Back 18

The wastewater depth.

Front 19

19. An O & M manual for a pump station should include?

Back 19

Safety instructions and equipment data sheets.

Front 20

20. At what location would you most likely find an air release valve?

Back 20

At a high elevation on a force main line.

Front 21

21. The frequency of lift station visits depend on?

Back 21

Type of wastewater being conveyed.

Front 22

22. Problems that may develop in a wet well that is too large may include?

Back 22

Solids deposition.

Grease build up.

Septic conditions and odors.

Front 23

23. Wastewater operators should view the prints of new lift stations so they may?

Back 23

Possibly prevent future problems by working with the engineers.

Front 24

24. Pump station operators need to be highly qualified in order to operate and maintain stations so that?

Back 24

Continuous operation is ensured.

The municipality’s investment is protected.

The complexity of the equipment can be understood.

Front 25

25. Flow measurement charts are?

Back 25

Useful for comparison to detect inflow.

Front 26

26. What information must be included on warning tag attached to a switch that has been locked out?

Back 26

Signature of person who locked out the switch and who is the only person authorized to remove the tag.

Front 27

27. Grease may tend to accumulate on the walls and equipment in a wastewater pump station wet well. This must be?

Back 27

Prevented if possible because accumulations often break loose and large pieces may clog the pump.

Front 28

28. Rate of flow in a force main leaving a wastewater pump station can be measured by a?

Back 28

Venturi meter.

Front 29

29. Free

Back 29

Free

Front 30

30. The body of a six inch gate valve has “200 WOG” inscribed on it. This means?

Back 30

The valve is rated for service at 200 psi for oil, gas or cold water.

Front 31

31. Sodium hypochlorite is?

Back 31

A compound that can be purchased in liquid solution and that can be used for disinfection.

Front 32

32. What is a backflow preventer?

Back 32

A device to prevent backsiphonage.

Front 33

33. To reduce the number of mysterious changes in station operation such as pumps turned off, control system changes and station doors or gates unlocked, pump stations should have?

Back 33

A sign in log and established, documented standard operating procedures (SOPs)

Front 34

34. What is a cause of cavitation in a pump?

Back 34

Improper design and/or head conditions under which the pump is operated.

Front 35

35. Circumstances that influence the frequency of pump station visits in a typical collection system may include?

Back 35

Monies allocated in the fiscal budget.

Jobs that are on the agenda for the day or week.

The number of stations in the system.

Front 36

36. Excessive quantities of heavy metals should be excluded from the collection system because?

Back 36

They may affect the treatment process.

Front 37

37. When operating a small wastewater pump station with two identical pumps, it is best to adjust the controls so that?

Back 37

The pumps alternate in operation.

Front 38

38. Maintenance of couplings between the driving and driven elements includes?

Back 38

Maintaining proper alignment, even with flexible couplings.

Front 39

39. A pneumatic ejector is best defined as?

Back 39

Compressed air pressurizing a vessel that forces wastewater out through check valves.