Wastewater exam answered - Study guides, Class notes & Summaries

TEXAS Wastewater Class C Exam - Complete Solutions (Answered) An old, over oxidized sludge at an underloaded plant produces mixed liquor solids that A. settle slowly but produce a clear effluent B. Settle rapidly leaving a turbid supernatant. C. Cannot nitrify but turn septic readily in the final clarifier D. All the above E. None of the above. The Correct operational response to a gently settling sludge which stays in the bottom two feet of the clarifier and produces a clear final effluent is...

Primary Clarifiers - correct answer In an activated sludge treatment system, primary treatment processes include the: Removal of Inorganic material from grit - correct answer In a washing grit remover, the grit is moved slowly by screw conveyors up an inclined channel in order to? 90% or above - correct answer An efficient primary clarifier is expected to remove ? of the influent settleable solids. Adequate DO at surface at all times - correct answer Proper operation of a facultative pond ...

What is true about chlorine gas? - ANSWERIt is 2.5 times heavier than air What is the typical BOD removal efficiency in a primary clarifier? - ANSWER20 to 50% What does the "F" in F/M ratio represent? - ANSWERThe food for the microorganisms flowing into the aeration tank, in lbs/day What describes the appearance of healthy activated sludge? - ANSWERBrown with a moderate amount of crisp, white foam What is used to control filamentous organisms? - ANSWERChlorine What are commonly ...

Exam (elaborations) NEHA REHS/RS (REHS) REHS Examination Review Work Exams (3 Latest 2023 Answered sets)/ REHS REVIEW BIG PRACTICE EXAM 1,2 And 3 REHS REVIEW BIG PRACTICE EXAM 1/REHS Practice Problems from Anton: 1. The most important factors in the xmsn of waterborne disease is: A) indirect contact and virulence B) dosage and virulence C) direct contact and dosage D) fomite and pathogen 2. In many jurisdictions, what needs to be issued before a newly constructed building, structur...

Exam (elaborations) NEHA REHS/RS (REHS) REHS Examination Review Work Exams (3 Latest 2023 Answered sets)/ REHS REVIEW BIG PRACTICE EXAM 1,2 And 3 REHS REVIEW BIG PRACTICE EXAM 1/REHS Practice Problems from Anton: 1. The most important factors in the xmsn of waterborne disease is: A) indirect contact and virulence B) dosage and virulence C) direct contact and dosage D) fomite and pathogen 2. In many jurisdictions, what needs to be issued before a newly constructed building, structur...

Exam (elaborations) NEHA REHS/RS (REHS) REHS Examination Review Work Exams (3 Latest 2023 Answered sets)/ REHS REVIEW BIG PRACTICE EXAM 1,2 And 3 REHS REVIEW BIG PRACTICE EXAM 1/REHS Practice Problems from Anton: 1. The most important factors in the xmsn of waterborne disease is: A) indirect contact and virulence B) dosage and virulence C) direct contact and dosage D) fomite and pathogen 2. In many jurisdictions, what needs to be issued before a newly constructed building, structur...

Exam (elaborations) Milestone 3 Environmental Science Sophia 20 questions were answered correctly. 4 questions were answered incorrectly. 1 Which of the following is currently increasing because of human population growth and its associated impacts?  Non-renewable resources  Land available for crops  Freshwater supplies  Sea levels CONCEPT Population Growth Solutions 2 Choose the true statement about global food production.  Examples of subsistence crops inclu...

Exam (elaborations) Milestone 3 Environmental Science Sophia You passed this Milestone 20 questions were answered correctly. 4 questions were answered incorrectly. 1 Which of the following is currently increasing because of human population growth and its associated impacts?  Non-renewable resources  Land available for crops  Freshwater supplies  Sea levels CONCEPT Population Growth Solutions 2 Choose the true statement about global food production.  Examples ...