Wastewater Operator certification Study Guide-Grade 2 Already Passed

Wastewater Operator certification Study
Guide-Grade 2 Already Passed
General Wastewater Treatment:




What is the pressure head caused by? ✔✔Water elevation




General Wastewater Treatment:




What color should the piping be that contains reclaimed water? ✔✔purple




General Wastewater Treatment:




What is the term for the height to which a column of water will rise in a well. ✔✔piezometric

surface




General Wastewater Treatment:




In general, what is the maximum practical lift of pumps ✔✔15-25ft

,General Wastewater Treatment:




Which one of the following valves is the best to use in throttling a flow situation?

a. gate

b. butterfly

c. globe


d. ball ✔✔globe




General Wastewater Treatment:




Which one of the following devices is used to measure water depths in storage facilities?




a. transducer

b. Venturi meter

c. magnetic sensor


d. thermistor ✔✔transducer

,Wastewater Treatment Facilities:




The velocity in sanitary sewers is approximately: ✔✔2 ft/s




Wastewater Treatment Facilities:




The distance between manholes ranges from ✔✔300-500ft




Wastewater Treatment Facilities:




What should the flow velocity be through a grit channel ✔✔1.0 ft/s




Wastewater Treatment Facilities:




Grit washers are used to______




a. remove some of the organic matter

b. remove large pieces of wood

, c. remove rags and eggshells


d. remove the odors ✔✔remove some of the organic matter




Wastewater Treatment Facilities:




The most common flow-measure device for wastewater is a_____ ✔✔parshall flume




Wastewater Treatment Facilities:




The detention time for primary clarifiers usually has a range of_____hr/s ✔✔1.5-2hr




Wastewater Treatment Facilities:




The effluent from which process is called mixed liquor




a.secondary clarification

b. primary clarification

c. sludge drying bed or pond