Primary clarifiers - Study guides, Class notes & Summaries
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Sanitarian Test Study Guide Part 3 Exam With Complete Solutions
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Sanitarian Test Study Guide Part 3 Exam 
With Complete Solutions 
Primary headworks of a wastewater treatment plant: - answerBar screens, primary settling 
basins (clarifiers) 
A pH of 0 to 7 is what? - answerAcidic 
A pH of 7 is? - answerNeutral 
A pH of 7 to 14 is? - answerBasic 
If there is color in water, in order to remove it, it must be? - answerA suspension 
Is rabies a bacteria or virus? - answerVirus 
How does rabies infect a human? - answerThrough their central nervous system 
What ani...
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CWEA Grade I Laboratory Analyst, questions and answers 2023
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CWEA Grade I Laboratory Analyst, questions and answers 2023 
Chloride 
- Major anion found in many natural waters 
- Can impart salty taste in H2O 
 
 
 
What increases concentration of chloride in wastewater 
Chloride in human diet and softeners flushed into sanitary sewer system 
 
 
 
2 most prevalent methods of measuring chloride 
argentometric and mercuric nitrate 
 
 
 
Argentometric 
Titration of sample with standard solution of silver nitrate (AgNO3) 
- Indicator: Chromate ions (CrO4) 
-...
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Texas Wastewater B Exam With 100% Correct Answers
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Texas Wastewater B Exam With 100% Correct Answers 
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...
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Treatment 2 Wastewater Operator certification Study Guide Exam Graded A+
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Treatment 2 Wastewater Operator certification Study Guide Exam GradedA 
General Wastewater Treatment: 
 
What is the pressure head caused by? 
Water elevation 
 
 
General Wastewater Treatment: 
 
What color should the piping be that contains reclaimed water? 
purple 
 
 
General Wastewater Treatment: 
 
What is the term for the height to which a column of water will rise in a well. 
piezometric surface 
 
 
General Wastewater Treatment: 
 
In general, what is the maximum practical lift of pumps...
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Texas Wastewater B Exam Questions With Verified Answers
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Texas Wastewater B Exam Questions With 
Verified Answers 
Primary Clarifiers - answerIn an activated sludge treatment system, primary treatment 
processes include the: 
Removal of Inorganic material from grit - answerIn a washing grit remover, the grit is moved 
slowly by screw conveyors up an inclined channel in order to? 
90% or above - answerAn efficient primary clarifier is expected to remove ? of the influent 
settleable solids. 
Adequate DO at surface at all times - answerProper operation ...
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CWEA Environmental Compliance Inspector Grade 1 Questions with Correct Solutions
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Floatable solids are easy to measure. True or False? 
False 
 
 
A well operated digester normally receives sludge at about __________% volatile solid and reduces it to about ________________% volatile solids. 
70-75%, 25-30% 
 
 
According to OSHA, which of the following oxygen in air concentration is the lowest safe concentration for humans to breathe in order to avoid the hazard of oxygen deficiency? 
19.5% oxygen 
 
 
The population equivalent factor for BOD is 
0.17 lb/day/BOD/person 
 
 
W...
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TCEQ Wastewater (Class D) License Prep Exam Questions and Complete Solutions.
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TCEQ Wastewater (Class D) License Prep Exam Questions and Complete Solutions 
 
Minimum velocity required to keep solids in suspension? - Answer: 2ft/sec 
 
Minimum required velocity a inverted siphon requires? - Answer: 3ft/sec 
 
Two most common pipe materials used in the collection system? - Answer: Clay & PVC 
 
OSHA minimum standards for shoring, sloping, or trench boxes are? - Answer: 5ft or deeper 
 
If the trench is _____ or deeper, use a portable ladder or other means of exit. - Answer:...
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Wastewater Operator certification Study Guide-Grade 2 Already Passed
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Wastewater Operator certification Study Guide-Grade 2 Already Passed 
General Wastewater Treatment: 
What is the pressure head caused by? Water elevation 
General Wastewater Treatment: 
What color should the piping be that contains reclaimed water? purple 
General Wastewater Treatment: 
What is the term for the height to which a column of water will rise in a well. piezometric surface 
General Wastewater Treatment: 
In general, what is the maximum practical lift of pumps 15-25ft 
General Wastewa...
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Wastewater Exam Class C
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20 Multiple choice questions 
Term 
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 to 
Increase return sludge flow rate 
Decrease return sludge flow rate 
Increase sludge wasting 
Decrease sludge wasting 
continue with past operating practices. 
1 of 20 
Term 
Primary clarifiers can have a higher surface loading rate than secondary clarifiers because 
The 0" reading is at the bottom of the ...
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TEXAS WASTEWATER CLASS A (TEST 3) QUESTIONS AND ANSWERS.
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What removes Total Suspended Solids from a sample (TSS) 
filtration 
 
 
 
What chapter of the Texas Water Code gives T C E Q authority to control discharges in Texas. 
Chapter 26 
 
 
 
Inorganic solids include 
sand, grit and minerals 
 
 
 
Organic solids include 
organic materials from plants, animals or humans 
 
 
 
A good plant influent pH is about 
7.2 
 
 
 
A simple method for indicating when to waste sludge is 
30 minute settling test 
 
 
 
What is the expected organic loading of a s...
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