Dissolved sulfide h2s - Study guides, Class notes & Summaries
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CWEA Lab Analyst Grade I Vocab | Verified
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40 CFR 121- 124 - The federal storm water regulations for the permitting of municipalities and industries. Regulations define storm water terms, permitting, inspecting, and sampling measurements 
 
40 CFR 136 - The regulations for sampling preservation and analyses of water, wastewater, and solid waste 
 
40 CFR 403 - The federal regulations defining the elements of a pretreatment program, prohibited discharges, and the approval process for establishing a pretreatment program 
 
Acid - ...
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ACS General Chemistry practice 147 Questions with Verified Answers,100%CORRECT
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ACS General Chemistry practice 147 Questions with Verified Answers 
 
Examples of Lewis-Acid based reactions - CORRECT ANSWER H+(aq) + OH-(aq) →← H2O(l), 
HCl(g) + NH3(g) → NH4Cl(s) 
H+(aq) + OH-(aq) →← H2O(l) 
 
According to the Lewis definition, an acid is a species - CORRECT ANSWER accepting a pair of electrons. 
 
All are potential Lewis bases except - CORRECT ANSWER CH4 
 
Which hydrated metal ion is most acidic under conditions of equal molar concentration in water? - CORRECT ANS...
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Water Treatment Exam 1 Questions and Answers 100% correct
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Water Treatment Exam 1 Questions and Answers 100% correct 
What are the main steps during the Hydrologic cycle? 
1. Evaporation 
2. Condensation 
3. Transportation 
4. Transpiration 
5. Precipitation 
6. Runoff 
 
 
 
Evaporation 
Defined as: Water is transferred from earths surface to atmosphere. 
-80% occurs from oceans 
-Evaporation occurs more at warm temperatures 
 
 
 
Condensation 
Defined as: Conversion of water vapor to liquid 
-excess water vapor condenses to form cloud droplets 
 
 
 ...
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ACS Gen Chem Practice Exam 77 Questions with Verified Answers,100% CORRECT
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ACS Gen Chem Practice Exam 77 Questions with Verified Answers 
 
Which is the strongest oxidizing agent? 
N a →← N a + + e - 2 . 7 1 V 
Cd →← Cd2+ + 2e- 0.40 V 
H2 →← 2H+ +2e- 0.00V 
Ag→← Ag++e- -0.80V 
(A) Na+ 
(B)H2 
(C) Cd0 
(D)Ag+ - CORRECT ANSWER Ag+ 
 
All are examples of Lewis acid-base reactions except 
Cu2+(aq) + 4NH3(aq) →← [Cu(NH3)4]2+(aq) 
HCl(g) + NH3(g) → NH4Cl(s) 
H+(aq) + OH-(aq) →← H2O(l) 
2Na(s) + Cl2(g) → 2NaCl(s) - CORRECT ANSWER 2Na + Cl2 ->...
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API 571 Practice Exam #1 Questions And Correct Answers, 100% Verified
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API 571 Practice Exam #1 Questions And Correct Answers, 100% Verified 
 
At what oxygen content would many metals become flammable even at low pressures, whereas they are non-flammable in air? 
a) >10% 
b) >25% 
c) 20-40% 
d) >40% 
B 
4.2.20.1 
What area of a heater burning fuel oil with numerous impurities would first suffer damage from fuel ash corrosion. 
a) shock tubes 
b) radian tubes 
c) tube hangers and supports 
d) convection tubes 
C 
4.4.6.4 c) 
Hydriding of titanium is a meta...
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REGISTERED SANITARIAN CHAPTER 5|2023/24 UPDATE|GRADED A+
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the wastewater from the flushing of a water closer, latrine, or privy is referred to as: 
Black water 
 
 
 
If a septic tank is pumped during a wet period , the : 
Tank may float out of the ground 
 
 
 
Nutrients associated with eutrophication include all of the following except: 
A. Organic carbon 
B. Potassium 
C. Nitrogen 
D. Phosphates 
Potassium 
 
 
 
Which of the following is LEAST important when reducing sewage to gases? 
A. Anaerobic bacteria 
B. Earth worms 
C. Protozoa 
D. Aerobic b...
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FE Exam – Environmental with 100% correct answers 2024.
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WASTEWATER TREATMENT BIOLOGY - answer- 
 
Aerobic Decomposition - answer-decomposition of organic material in the presence of oxygen 
 
Aerobic Decomposition 
a. end products 
b. appropriate BOD levels 
c. how much sludge produced - answer-a. water, CO2, new cell material 
b. <500 mg/l (dilute ww) 
c. produces a lot of sludge 
 
Anaerobic Decomposition - answer-decomposition in the absence of oxygen and nitrate 
- primary electron acceptors are sulfate (SO42-), CO2, and organic compounds that...
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WasteWater Operator class C exam practice review questions and answers with certified solutions
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WasteWater Operator class C exam practice review questions and answers with certified solutions 
When Chlorine is combined with water what type of pipe should be used? 
A. Ductile iron 
B. Asbestos concrete 
C. PVC D. Carbon Steel C. PVC 
A good settling sludge would consist of what type of protozoa? 
A. Rotifers and nematodes 
B. Amoebas and Flagellates 
C. Stalked ciliates and mastagoria D. Free swimmers and stalk ciliates D. Free swimmers and stalk ciliates 
What is Phenolphylein used for in ...
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Class A Water Operator Test Questions and Complete Solutions
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Class A Water Operator Test Questions and Complete Solutions 
 
How many Training Hours and experience for a class D Water Operator - Answer: 16 Hours Training and No Experience 
 
How many Training Hours and experience for a class C Water Operator - Answer: 36 Hours Training and 1 year Experience 
 
How many Training Hours and experience for a class B Water Operator - Answer: 100 Hours Training and 3 years Experience (must include 1 year of hands on experience) 
 
How many Training Hours and ex...
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Class A Water Operator Test Questions and Complete Solution
- Exam (elaborations) • 18 pages • 2024
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Class A Water Operator Test Questions and Complete Solutions 
 
How many Training Hours and experience for a class D Water Operator - Answer: 16 Hours Training and No Experience 
 
How many Training Hours and experience for a class C Water Operator - Answer: 36 Hours Training and 1 year Experience 
 
How many Training Hours and experience for a class B Water Operator - Answer: 100 Hours Training and 3 years Experience (must include 1 year of hands on experience) 
 
How many Training Hours and ex...
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