Soda ash is Study guides, Class notes & Summaries
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Pool Operator's Final Exam: Questions & Answers: Updated A Plus Guide
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The percentage of hypochlorous acid formation is most influenced by: (Ans- pH 
 
Pool painting is usually done: 
 (Ans- Before opening in the spring 
 
When a pool is chlorinated with gas chlorine, the operator must also use: (Ans- Soda Ash 
 
The term "chlorine demand" refers to: 
(Ans- The amount of chlorine which will react with substances in the pool 
 
Re-circulation pumps used in swimming pools are the type called: 
(Ans- Centrifugal pumps 
 
Reversing the flow of water through the fil...
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AWWA WSO Water Treatment Grades 3&4 Questions With Complete Solutions.
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Which disinfectant would work best against cryptosporidium? - Ozone 
The pH of a water sample is greater that the pHs so the Langlier index? - Indicates the water is 
scale forming. 
When water high in calcium bicarbonate is softened by ion exchange - Sodium bicarbonate 
remains in the product water. 
Lime softening can effectively disinfect water because: - The pH level is higher than 10.5 
A noncarbonate hardness compound is - MgSO4 
What term refers to the reintroduction of carbon dioxide int...
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AWWA WSO Water Treatment Grades 3&4|215 Test Questions & Answers | with 100% Correct Answers | Updated & Verified
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Which disinfectant would work best against cryptosporidium? - ️️Ozone 
 
The pH of a water sample is greater that the pHs so the Langlier index? - ️️Indicates the water is scale forming. 
 
When water high in calcium bicarbonate is softened by ion exchange - ️️Sodium bicarbonate remains in the product water. 
 
Lime softening can effectively disinfect water because: - ️️The pH level is higher than 10.5 
 
A noncarbonate hardness compound is - ️️MgSO4 
 
What term refers to th...
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Certified Pool Operator Exam Prep (Latest 2024/ 2025 Update) 100% Correct Questions and Verified Answers| Grade A
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Certified Pool Operator Exam Prep (Latest 2024/ 2025 Update) 100% Correct Questions and Verified Answers| Grade A 
 
Q: You can become sick from ingesting water infected with Legionella bacteria 
 
 
Answer: 
false 
 
 
 
Q: Channeling of filters occurs when: 
 
 
Answer: 
the FMR is exceeded, and water cuts a channel through the media 
 
 
 
Q: The only physical factor that affects water balance is: 
 
 
Answer: 
temperature 
 
 
 
Q: To be classified as a disinfectant, a compound must kill or ...
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CNST 1301 Final || A+ Graded Already.
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Topped out correct answers Installing the last beam on a steel construction project is known as what? 
 
Dome correct answers An arch rotated around its vertical centerline is the definition of what? 
 
Fly ash correct answers What type of concrete admixture is a recyclable material, produced from coal fired power plants and increases the strength and workability in concrete? 
 
85% correct answers Clear glass transmits what percentage of visible light? 
 
Flashing correct answers Special detail...
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REHS Questions and Answers Rated A
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REHS Questions and Answers Rated A What would you expect from a swimming pool with a high pH reading? Cloudiness and eye irritation 
Which will raise the pH of a pool? 
a. Calcium Bicarbonate 
b. Calcium Carbonate c. Soda Ash or Caustic Soda Soda Ash or Caustic Soda 
Soda ash is Sodium Carbonate NaCO3 
Caustic Soda is NaOH 
Which chemical is used to oxygenate swimming pool water? 
a. Ozone 
b. Sodium Carbonate 
c. Sodium Bicarbonate d. Calcium Carbonate Sodium Carbonate 
How would a swimmer most...
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Pool Operator's Final Exam | Questions & 100% Correct Answers (Verified) | Latest Update | Grade A+
- Exam (elaborations) • 16 pages • 2024
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The percentage of hypoclorous acid formation is most influenced by: 
: pH 
Pool painting is usually done: 
: Before opening in the spring 
When a pool is chlorinated with gas chlorine, the operator must also use: 
: Soda Ash 
The term "chlorine demand" refers to: 
: The amount of chlorine which will react with substances in the pool 
Re-circulation pumps used in swimming pools are the type called: 
2 | P a g e 
: Centrifugal pumps 
Reversing the flow of water through the filters is called: 
: ...
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REHS Practice Test Questions With Complete Solutions
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Soil permeability procedure involves evaluating a soil core or test pit. What does the procedure yield? 
 
a. Permeability estimated seepage rate 
b. Permeability estimated application rate 
c. Permeability estimated range correct answer: b. Permeability estimate 
 
How does chlorine kill microorganisms and bacteria? 
 
a. By weakening enzymes and destroying internal organelles 
b. By attacking lipids in cell walls and destroying enzymes and structures inside 
c. By breaking bonds and poisoning...
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REHS Practice Test Questions and Answers 100% Accurate
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REHS Practice Test Questions and Answers 100% Accurate 
Soil permeability procedure involves evaluating a soil core or test pit. What does the procedure yield? 
 
a. Permeability estimated seepage rate 
b. Permeability estimated application rate 
c. Permeability estimated range 
b. Permeability estimate 
 
 
 
How does chlorine kill microorganisms and bacteria? 
 
a. By weakening enzymes and destroying internal organelles 
b. By attacking lipids in cell walls and destroying enzymes and structure...
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Water Treatment Exam Graded A+
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What is the purpose of adding Carbon Dioxide to Softened water? - ANSWER-Restores the Carbonate Balance. 
 
How is lime sludge dewatered? - ANSWER-By Solar Lagoons 
 
How can Non-Carbonate Hardness be achieved? - ANSWER-By Sodium Carbonate, Ion Exchange, Membrane Separation, Sodium Hydroxide. 
 
What is Selective Carbonate Removal? - ANSWER-Removal of Calcium Bicarbonate Hardness at PH of 9.6. 
 
Noncarbonate hardness present in water means? - ANSWER-The Total Hardness is greater than the Total ...
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