When chlorine is added to - Study guides, Class notes & Summaries
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Chem 219: Module 2 Exam Questions With 100% Correct Answers
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Chem 219: Module 2 Exam 
Questions With 100% Correct Answers 
What are hydrocarbons? - answerMolecules composed of only the elements carbon and 
hydrogen 
What are the two major classes of hydrocarbons? - answerAromatic (benzene) and aliphatic 
(alkanes, alkenes, alkynes) 
What is the main source of hydrocarbons? - answerFossil fuels like coal, petroleum, and 
natural gas obtained by mining and drilling. 
What are Alkanes? - answerThey are saturated hydrocarbons because their skeleton is only 
c...
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Navy CS2 Exam 2024 with 100% correct answers
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Hydrostatic testing of steam jacket kettles is required on what basis? - correct answer Annually 
 
Hydrostatic testing of steam jacket kettles is required as per what instruction? (Ashore) - correct answer OPNAVINST 11000.16 
 
Steam jacket kettles vary in size from 5 to how many gallons? - correct answer 80 Gallons 
 
The griddle consists of cooking surfaces of various sizes up to 34 inches deep by how many inches wide? - correct answer 72 inches 
 
What are large frying pans with deep...
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TCEQ Class C Water License Exam Questions and Answers Latest Updated 2024/2025 (100% Correct) Graded A+
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TCEQ Class C Water License Exam Questions and Answers Latest Updated 2024/2025 (100% Correct) Graded A+. State Agency responsible for enforcing the safe drinking water act in Texas 
(Ans- Texas Commission on environmental Quality 
What minerals can cause water hardness 
(Ans- Calcium and magnesium 
A public water system must at all times provide 
(Ans- Adequate quantity of water, pressure, and disinfection 
A source groundwater would be 
(Ans- aquifer 
Fecal coliform organisms sometimes found in...
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TCEQ Class B Surface Water B test Material Latest Exam And Answers Rated A+ 2024.
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What is the most important factor affecting the useful life of service lines? - Answer It is the ability of the material to resist internal and external corrosion 
 
When does Suction Head exist? - Answer Suction head exists when the source of supply is above the centerline of the pump. 
 
What is Net positive Suction Head (NPSH) - Answer NPSH is the pressure under which water enters the eye of the impeller in a centrifugal pump. Insufficient NPSH is the main cause of pump cavitation 
 
Ex...
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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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CWEA LAB ANALYST COMPLETE SET|2023/24 UPDATE|GRADED A+
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An amperometric titration is often used when measuring 
Residual chlorine 
 
 
 
The most important reason for chlorinating effluent is 
Disinfection 
 
Chlorination serves primarily to destroy or deactivate disease-producing microorganisms 
 
 
 
 
When wastewater samples are chlorinated and the pH is lowered 
HCLO is formed 
Hypochlorous acid 
 
 
 
Which of the following constituents is the best disinfecting agent? 
HClO 
 
 
 
What is most likely to interfere with the DPD test? 
Oxidized man...
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AQA GCSE COMBINED SCIENCE: TRILOGY 8464/C/1H Higher Tier Chemistry Paper 1H Question Paper + Mark scheme [MERGED] June 2022 *jun228464c1H01* IB/M/Jun22/E10 8464/C/1H For Examiner’s Use Question Mark 1
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AQA 
GCSE 
COMBINED SCIENCE: TRILOGY 
8464/C/1H 
Higher Tier 
Chemistry Paper 1H 
Question Paper + Mark scheme [MERGED] 
June 2022 
*junc1H01* 
IB/M/Jun22/E10 8464/C/1H 
For Examiner’s Use 
Question Mark 
1 
2 
3 
4 
5 
6 
7 
TOTAL 
Time allowed: 1 hour 15 minutes 
Materials 
For this paper you must have: 
• a ruler 
• a scientific calculator 
• the periodic table (enclosed). 
Instructions 
• Use black ink or black ball-point pen. 
• Pencil should only be used for drawing. 
• Fill ...
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AQA AS CHEMISTRY 7404/2 Paper 2 Organic and Physical Chemistry Question Paper + Mark scheme [MERGED] June 2022 *JUN227404201* IB/M/Jun22/E7 7404/2 For Examiner’s Use Question Mark 1
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AQA 
AS 
CHEMISTRY 
7404/2 
Paper 2 Organic and Physical Chemistry 
Question Paper + Mark scheme [MERGED] 
June 2022 
*JUN* 
IB/M/Jun22/E7 7404/2 
For Examiner’s Use 
Question Mark 
1 
2 
3 
4 
5 
6 
7 
Section B 
TOTAL 
Time allowed: 1 hour 30 minutes 
Materials 
For this paper you must have: 
• the Periodic Table/Data Sheet, provided as an insert (enclosed) 
• a ruler with millimetre measurements 
• a scientific calculator, which you are expected to use where appropriate. 
Instructions...
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Water Distribution Test 2 Questions and Answers!!
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Water Distribution Test 2 Questions and Answer 
What does a C value of 140 means for a pipe? - ANSWER The pipe interior is very smooth. 
 
Which primary contaminant causes Blue Baby Syndrome? - ANSWER Nitrate. 
 
What is a nutating disc? - ANSWER Type of a water meter for a small-diameter domestic service. 
 
What causes hardness in water? - ANSWER Magnesium and calcium. 
 
Which of the following is a confined aquifer with groundwater under positive pressure? - ANSWER Artesian. 
 
____________ i...
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CSP1501 Assignment 1 2024 (Solutions)
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CSP1501 Assignment 1 2024 (Solutions) 
 
Question 1 
Not yet answered 
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Question text 
Which one of the following options lists only inorganic compounds? 
a. 
Water, salts, gas 
b. 
Carbohydrates, protein, fats 
c. 
Salts, gas, carbohydrates 
d. 
Water, oxygen, carbon dioxide, electrolytes 
Clear my choice 
Question 2 
Not yet answered 
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Question text 
Select the correct symbol for Dubnium 
a. 
Db 
b. 
D 
c. 
Dm 
d. 
Du 
Questio...
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