Wastewater exam answered - Study guides, Class notes & Summaries
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TEXAS Wastewater Class C Exam - Complete Solutions (Answered)
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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...
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Texas Wastewater B exam study guide with complete solution
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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 ...
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Wastewater Treatment Operator Certification Practice Exam #2 Questions 100% Answered
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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 ...
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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
- Exam (elaborations) • 37 pages • 2023
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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...
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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
- Exam (elaborations) • 37 pages • 2023
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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...
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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
- Exam (elaborations) • 37 pages • 2023
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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...
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Exam (elaborations) Milestone 3 Environmental Science Sophia
- Exam (elaborations) • 11 pages • 2022
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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...
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Milestone 3 Environmental Science Sophia
- Exam (elaborations) • 11 pages • 2021
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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 ...
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