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Questions and Answers
What step comes after substituting given values from the problem statement?
What step comes after substituting given values from the problem statement?
- Draw a sketch of the problem and write down the given values and identify unknown value/s
- Box the answer with the correct units
- Calculate the answer (correct)
- Write down the formula required to solve the problem
What should be done if the instructor needs to understand the work presented in math worksheets?
What should be done if the instructor needs to understand the work presented in math worksheets?
- Organize the work clearly (correct)
- Submit multiple images of different sections
- Use complex mathematical notations
- Skip labeling the problem numbers
What is the purpose of most wastewater treatment plants?
What is the purpose of most wastewater treatment plants?
- To treat domestic sewage only
- To treat industrial waste only
- To have a separate industrial-wastewater collection system (correct)
- To collect industrial waste only
What can result in corrosion of concrete structures in a moist atmosphere?
What can result in corrosion of concrete structures in a moist atmosphere?
When can grab or composite samples be used interchangeably?
When can grab or composite samples be used interchangeably?
In a primarily domestic wastewater treatment plant, is the influent wastewater BOD always greater than its chemical oxygen demand?
In a primarily domestic wastewater treatment plant, is the influent wastewater BOD always greater than its chemical oxygen demand?
Is coliform testing typically conducted on a grab sample?
Is coliform testing typically conducted on a grab sample?
Is a lateral the largest sewer line that brings the wastewater to the treatment plant?
Is a lateral the largest sewer line that brings the wastewater to the treatment plant?
At a primarily domestic wastewater treatment plant, is the influent wastewater BOD always less than its chemical oxygen demand?
At a primarily domestic wastewater treatment plant, is the influent wastewater BOD always less than its chemical oxygen demand?
Which of the following statements about pre-aeration and settling in a primary clarifier is true?
Which of the following statements about pre-aeration and settling in a primary clarifier is true?
What happens if a grit chamber has a faster flow velocity than recommended?
What happens if a grit chamber has a faster flow velocity than recommended?
What would be the result of an inadequate detention time in a primary clarifier?
What would be the result of an inadequate detention time in a primary clarifier?
In a primarily domestic wastewater treatment plant, is the influent wastewater BOD always less than its chemical oxygen demand?
In a primarily domestic wastewater treatment plant, is the influent wastewater BOD always less than its chemical oxygen demand?
What is the average specific gravity of sludge solids in wastewater?
What is the average specific gravity of sludge solids in wastewater?
What does the weir overflow rate of a primary clarifier measure?
What does the weir overflow rate of a primary clarifier measure?
What do gas bubbles rising to the surface in a primary clarifier indicate?
What do gas bubbles rising to the surface in a primary clarifier indicate?
What do gas bubbles rising to the surface in a primary clarifier NOT indicate?
What do gas bubbles rising to the surface in a primary clarifier NOT indicate?
What does a properly designed primary clarifier remove 90 percent of?
What does a properly designed primary clarifier remove 90 percent of?
What does a positive ORP indicate in water treatment?
What does a positive ORP indicate in water treatment?
What substance is grit mostly composed of in wastewater treatment?
What substance is grit mostly composed of in wastewater treatment?
What is NOT typically removed by a properly designed primary clarifier?
What is NOT typically removed by a properly designed primary clarifier?
What is the main objective of primary sedimentation?
What is the main objective of primary sedimentation?
What could cause significant gas bubbles formation on the water surface of a primary clarifier?
What could cause significant gas bubbles formation on the water surface of a primary clarifier?
What is considered a normal detention time for a primary clarifier?
What is considered a normal detention time for a primary clarifier?
What is likely to result from an inadequate detention time in a primary clarifier?
What is likely to result from an inadequate detention time in a primary clarifier?
What is the main objective of primary sedimentation?
What is the main objective of primary sedimentation?
What would be considered normal detention time for a primary clarifier?
What would be considered normal detention time for a primary clarifier?
What could observation of significant gas bubbles formation on the water surface of a primary clarifier indicate?
What could observation of significant gas bubbles formation on the water surface of a primary clarifier indicate?
What can result in sludge gasification at a wastewater treatment plant?
What can result in sludge gasification at a wastewater treatment plant?
What is the pounds per day BOD in the primary effluent after 47% BOD removal of a 4 MGD flow with 350 mg/l influent BOD concentration?
What is the pounds per day BOD in the primary effluent after 47% BOD removal of a 4 MGD flow with 350 mg/l influent BOD concentration?
What is the flow velocity in feet per minute for a channel that is 3 ' wide x 4 ' deep, with a flow of 7.5 MGD and a depth of flow of 15 inches?
What is the flow velocity in feet per minute for a channel that is 3 ' wide x 4 ' deep, with a flow of 7.5 MGD and a depth of flow of 15 inches?
What is the surface loading rate (gal/(day-sq.ft)) for a 15 MGD flow in a 105 ft diameter primary sedimentation tank operating at a water depth of 20 ft?
What is the surface loading rate (gal/(day-sq.ft)) for a 15 MGD flow in a 105 ft diameter primary sedimentation tank operating at a water depth of 20 ft?
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