Wastewater Study guides, Class notes & Summaries

Wastewater Treatment Operator Certification Test #2 2022/2023 Quiz

The first step in maintenance staff should take in properly locking and tagging out a piece of equipment is to alert the operator on duty When working in an area with two or more floor coverings, be sure that they are always Secured together When manually lifting any object be sure to keep it close to your body and use leg strength Oxygen deficiency becomes a concern when the oxygen level in a confined space is less than 19.5% What provides safety information for ...

Describe proper design of force main wastewater lines - Answer-Minimum 2 fps velocity with the smallest pump operating alone. Minimum 4 inch diameter pipe 150 psi rating. What is Standard Dimension Ratio? - Answer-Ratio of outside pipe diameter (OD) to wall thickness (PVC) Describe proper design of gravity wastewater lines. - Answer-Designed to flow half full under normal conditions at a minimum of 2 fps maximum of 10 fps. A primary clarifier should remove how much BOD and TSS? - ...

BIO 250 Final Exam (Microbiology) | 60 Questions With 100% Correct Answers | Latest Update | Graded A+. What microbial process was responsible for changing Earth’s atmosphere from one without oxygen to one with oxygen? Select one: a. anaerobic respiration b. decomposition c. oxygenic photosynthesis d. temperature regulation In the nitrogen cycle, which of the following phases involves the release of nitrogen as into the Earth’s atmosphere? Select one: a. ammonication b. denitrica...

As an operator, you are responsible to your employer for maintaining an economical and efficient operating facility. (Ans - TRUE An operator has an obligation to the great numbers of people who rely on down stream water supplies and are totally dependent on the operator's competence and trust worthiness for their welfare (Ans - TRUE Today, the natural purification processes in rivers treat all the waste loads and keep rivers clean. (Ans - FALSE Operators are water quality protectors...

Wastewater Treatment Operator Certification Test #4 Latest Update 2022/2023

water becomes denser as it becomes - colder chemical symbol for lead - Pb Elements that are isotopes contain different numbers of ______________ - neutrons table salt is - sodium chloride Water has a much higher boiling point than expected because of - hydrogen bonding Chemical bonds occur when atoms share___________ - electrons The number of electrons in an atom's outermost electron layer determine its ____________ - chemical properties The chief operator at a Grade 2 plan...

An Imhoff cone is used to measure________solids. A. suspended B. colloidal C. volatile D. settleable (Ans- D. settleable (Operation of Wastewater Treatment Plants, Volume 1 by Kenneth D. Kerri) A _____ flume is widely used for measuring wastewater flow. (Ans- Parshall (Operation of Wastewater Treatment Plants, Volume 1 by Kenneth D. Kerri) Velocity of flow in a grit channel must be reduced to a range of ____ to _____ fps in order for grit to properly settle. (Ans- .7 to...

1-What microbial process was responsible for changing Earth’s atmosphere from one without oxygen to one with oxygen? Select one: a. anaerobic respiration b. decomposition c. oxygenic photosynthesis d. temperature regulation 2-In the nitrogen cycle, which of the following phases involves the release of nitrogen as into the Earth’s atmosphere? Select one: a. ammonification b. denitrification c. nitrification d. nitrogen fixation 3-Farmers commonly inoculate legume crops with Rhi...