Rehs wastewater Study guides, Class notes & Summaries

REHS Exam (Latest 2023/ 2024 Update) Questions and Verified Answers| 100% Correct |Grade A Q: Which of the following is non-toxic to aquatic organisms, a good viricide, and adds oxygen to treated wastewater effluents? a. ozone b. calcium hypochlorine c. sulfur dioxide d. chlorine dioxide Answer: ozone Q: The typical limitation of use of the septic tank absorption field system is due to a. cost b. land use considerations c. soil type and size requirements d. a...

REHS WastewaterSludge and scum accumulation, and the appearance of particles of solids in the effluent from a septic tank is an indication of what? a. a failure in the absorption field b. a septic tank in need of cleaning c. a water line leak d. the need to replace the septic tank - correct answer a septic tank in need of cleaning Which of the following soils would be most suitable for subsurface absorption of wastewater? a. mottled brown and red soil b. blue soil c. grayish soil ...

REHS Wastewater Treatment and Disposal Test Questions and Answers Latest Update 2024/2025 (100% Verified) A watertight tank designed to slow down the movement of raw sewage and wastes passing through to the soils is known as a Choose one answer. a. pit privy b. spring house c. septic tank d. grease trap c. septic tank Sludge and scum accumulation, and the appearance of particles of solids in the effluent from a septic tank is an indication of what? Choose one answer. a. a failure in t...

REHS WastewaterSludge and scum accumulation, and the appearance of particles of solids in the effluent from a septic tank is an indication of what? a. a failure in the absorption field b. a septic tank in need of cleaning c. a water line leak d. the need to replace the septic tank - correct answer a septic tank in need of cleaning Which of the following soils would be most suitable for subsurface absorption of wastewater? a. mottled brown and red soil b. blue soil c. grayish soil ...

CA REHS WastewaterWastewater must reach the treatment plan in how many days? - correct answer 2 days How is sewage strength determined? - correct answer 1. measure BOD over 5 days at 20C, typically higher in summer than winter 2. suspended solids 3. COD What is the best single measure of water pollution? - correct answer BOD What is one way to determine the amount of industrial waste in water? - correct answer Chemical oxygen demand (oxidizable inorganic matter) Does cold water...

What are the treatment processes in PRELIMINARY Wastewater Treatment? correct answer: Screening Comminution Grit Removal Pre-Aeration Flow Metering / Sampling What are the treatment processes in PRIMARY Wastewater Treatment? correct answer: Sedimentation / Flotation What are the treatment processes in SECONDARY Wastewater Treatment? correct answer: Biological Treatment (ie activated sludge, trickling filters, rotating biological contactor (RBC)) Sedimentation What are the trea...

CA REHS WastewaterWastewater must reach the treatment plan in how many days? - correct answer 2 days How is sewage strength determined? - correct answer 1. measure BOD over 5 days at 20C, typically higher in summer than winter 2. suspended solids 3. COD What is the best single measure of water pollution? - correct answer BOD What is one way to determine the amount of industrial waste in water? - correct answer Chemical oxygen demand (oxidizable inorganic matter) Does cold water...

REHS Exam: Private Onsite Wastewater Treatment and Disposal Questions and Answers with Complete Solutions

REHS Exam - Wastewater Treatment Questions with correct Answers

REHS Wastewater treatment and Disposal Quiz Questions and Correct Answers Updated Version 2023