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illinois class 4 wastewater practice test
14/08/2014 Study Tools | American Water College c. aerobic pond Each of the Practice Exams is a multiple choice test (50 questions). Wastewater Collection Practice Test #3 Page 6 of 26 9) Sewer "A" has 106,000 people at 95 GPCD. Usually, what is the % accuracy of a graduated cylinder and burette? When the pump is not running, the water rises in 3 min. a. primary clarifier Waste Treatment Ponds: What type of fire extinguishers should be used on electrical fires? Find out how you can intelligently organize your Flashcards. I just challenged the Water Treatment level 1 exam this Monday and noticed there were questions regarding distribution on it as well. b. vibrating trough In a small package, wastewater treatment plant, the operator should try to keep the dissolved oxygen in the aeration tank at approximately:____mg/L. Phone (800) 666-0206. c. COD What is the difference between a weak acid and a strong acid? Sedimentation and Flotation: Odor Control: a. BOD Approvedce | Approved Environment Inc. | Learn. Online Another solids treatment thickening process would be: proper operation. d. COD, Trickling Filters: Disinfection: Need-to-Know Criteria outline the content that will be covered on the 2017 ABC standardized exams. PDF Wastewater Collections Grade 2 Practice Test California Tightened down to a drip. d. compost. Which one of the following methods would not be used to feed DRY chemicals? Each question has been validated through a process of panel review. In general, secondary sludges: b. oils and greases Certification testing is offered as a computer-based test. d. dissolved oxygen, Wastewater Solids Processing: temperature favoring the growth of a particular species of algae. Stabilization Ponds Operations Manual USEPA 430/9-77-012 Available through: . Under which of the following conditions should sludge wasting normally be increased? c. composting Wastewater Solids Processing: The Wastewater Operator Certification Program is intended to protect public health, environmental quality, and the financial investment of wastewater facilities. Maintenance: Approx. which one of the following wastewater solids would most likely never end up on a dedicated land disposal (DLD) site? a. oils and greases a. contain 20-25% nonvolatile inorganic matter Class 4 Wastewater IL 4.0 (1 review) Term 1 / 88 What do you do if a sewer line is plugged? When is the pH in a waste pond the lowest? Perfect for water distribution operators taking their D-1, D-2, D3 Operator exams (DI-DIII.) What document provides a profile of hazardous substances and/or mixtures? d. chemical oxidation, Wastewater Solids Processing: brought to you by royceu.com Pool Chemistry Note: The Grade 7 Upgrade Application must be mailed to the Commonwealth of Mass, as shown on the form. A solids treatment thickening process method would be Introduction Test takers are allowed three hours to complete the exam. a. nitric acid If the manometer indicates the gas pressure in a digester is below normal, what would be the most probable cause? Virtual Wastewater and Math Review workshops meet from 1:00 p.m. to 3:00 p.m. Sludge Digestion & Solids Handling: Effluent Disposal: The plant engineer estimates the machine has a useful life of 5 years and no salvage value. directs raw and digested sludge mixture to a heating area. the books are a tad overkill for the ABC tests. b. BOD What is the purpose of a draft tube in an anaerobic sludge digester? d. phosphate-free surfactant, Activated Sludge: name the laboratory glassware that can be used to heat liquids in an open flame? Which organism wold most probably be associated with moderate sludge age and effluent water quality, Wastewater sources & characteristics: An atmosphere is defined as oxygen deficient if it contains less than what % oxygen by volume? a. gray A pond that contains oxygen in its upper layers and lacks oxygen in the bottom layer is classified as, Waste Treatment Ponds: . Which one of the following best defines the term stray-current corrosion? What is the optimum temperature for digester substances? Name the type of centrifuge that uses a knife or plow insertion to scrap off the "cake" from its walls? Disinfection: 2017 Wastewater Treatment Operator Formula/Conversion Table. a. screw feeder 0000002114 00000 n ._3-SW6hQX6gXK9G4FM74obr{display:inline-block;vertical-align:text-bottom;width:16px;height:16px;font-size:16px;line-height:16px} Mixed liquor is a combination of what 3 things? Maintenance: Water and Wastewater Microbiology" .Rd5g7JmL4Fdk-aZi1-U_V{transition:all .1s linear 0s}._2TMXtA984ePtHXMkOpHNQm{font-size:16px;font-weight:500;line-height:20px;margin-bottom:4px}.CneW1mCG4WJXxJbZl5tzH{border-top:1px solid var(--newRedditTheme-line);margin-top:16px;padding-top:16px}._11ARF4IQO4h3HeKPpPg0xb{transition:all .1s linear 0s;display:none;fill:var(--newCommunityTheme-button);height:16px;width:16px;vertical-align:middle;margin-bottom:2px;margin-left:4px;cursor:pointer}._1I3N-uBrbZH-ywcmCnwv_B:hover ._11ARF4IQO4h3HeKPpPg0xb{display:inline-block}._2IvhQwkgv_7K0Q3R0695Cs{border-radius:4px;border:1px solid var(--newCommunityTheme-line)}._2IvhQwkgv_7K0Q3R0695Cs:focus{outline:none}._1I3N-uBrbZH-ywcmCnwv_B{transition:all .1s linear 0s;border-radius:4px;border:1px solid var(--newCommunityTheme-line)}._1I3N-uBrbZH-ywcmCnwv_B:focus{outline:none}._1I3N-uBrbZH-ywcmCnwv_B.IeceazVNz_gGZfKXub0ak,._1I3N-uBrbZH-ywcmCnwv_B:hover{border:1px solid var(--newCommunityTheme-button)}._35hmSCjPO8OEezK36eUXpk._35hmSCjPO8OEezK36eUXpk._35hmSCjPO8OEezK36eUXpk{margin-top:25px;left:-9px}._3aEIeAgUy9VfJyRPljMNJP._3aEIeAgUy9VfJyRPljMNJP._3aEIeAgUy9VfJyRPljMNJP,._3aEIeAgUy9VfJyRPljMNJP._3aEIeAgUy9VfJyRPljMNJP._3aEIeAgUy9VfJyRPljMNJP:focus-within,._3aEIeAgUy9VfJyRPljMNJP._3aEIeAgUy9VfJyRPljMNJP._3aEIeAgUy9VfJyRPljMNJP:hover{transition:all .1s linear 0s;border:none;padding:8px 8px 0}._25yWxLGH4C6j26OKFx8kD5{display:inline}._2YsVWIEj0doZMxreeY6iDG{font-size:12px;font-weight:400;line-height:16px;color:var(--newCommunityTheme-metaText);display:-ms-flexbox;display:flex;padding:4px 6px}._1hFCAcL4_gkyWN0KM96zgg{color:var(--newCommunityTheme-button);margin-right:8px;margin-left:auto;color:var(--newCommunityTheme-errorText)}._1hFCAcL4_gkyWN0KM96zgg,._1dF0IdghIrnqkJiUxfswxd{font-size:12px;font-weight:700;line-height:16px;cursor:pointer;-ms-flex-item-align:end;align-self:flex-end;-webkit-user-select:none;-ms-user-select:none;user-select:none}._1dF0IdghIrnqkJiUxfswxd{color:var(--newCommunityTheme-button)}._3VGrhUu842I3acqBMCoSAq{font-weight:700;color:#ff4500;text-transform:uppercase;margin-right:4px}._3VGrhUu842I3acqBMCoSAq,.edyFgPHILhf5OLH2vk-tk{font-size:12px;line-height:16px}.edyFgPHILhf5OLH2vk-tk{font-weight:400;-ms-flex-preferred-size:100%;flex-basis:100%;margin-bottom:4px;color:var(--newCommunityTheme-metaText)}._19lMIGqzfTPVY3ssqTiZSX._19lMIGqzfTPVY3ssqTiZSX._19lMIGqzfTPVY3ssqTiZSX{margin-top:6px}._19lMIGqzfTPVY3ssqTiZSX._19lMIGqzfTPVY3ssqTiZSX._19lMIGqzfTPVY3ssqTiZSX._3MAHaXXXXi9Xrmc_oMPTdP{margin-top:4px} 78 terms. This class addresses all the test topics and provides the operators with all the study material necessary to prepare for the exam. Activated Sludge: If this is your first exam attempt, a short history of the current exam development should be of interest. STUDY STRATEGY 10-13 . a. anatomy and physiology. c. O3 d. plunger feeder, Solids removal from secondary effluent: Rotating Biological Contactors: What type of protozoa is typically associated with a poor treatment process and a young bio-solids age? VII. d. incineration, Wastewater Solids Processing: Why do the strings used for the lowest-frequency notes on a piano normally have wire wrapped around them? ._2a172ppKObqWfRHr8eWBKV{-ms-flex-negative:0;flex-shrink:0;margin-right:8px}._39-woRduNuowN7G4JTW4I8{margin-top:12px}._136QdRzXkGKNtSQ-h1fUru{display:-ms-flexbox;display:flex;margin:8px 0;width:100%}.r51dfG6q3N-4exmkjHQg_{font-size:10px;font-weight:700;letter-spacing:.5px;line-height:12px;text-transform:uppercase;-ms-flex-pack:justify;justify-content:space-between;-ms-flex-align:center;align-items:center}.r51dfG6q3N-4exmkjHQg_,._2BnLYNBALzjH6p_ollJ-RF{display:-ms-flexbox;display:flex}._2BnLYNBALzjH6p_ollJ-RF{margin-left:auto}._1-25VxiIsZFVU88qFh-T8p{padding:0}._2nxyf8XcTi2UZsUInEAcPs._2nxyf8XcTi2UZsUInEAcPs{color:var(--newCommunityTheme-widgetColors-sidebarWidgetTextColor)} Enhanced Biological (Nutrient) Control: Approximately what % of the dissolved solids in wastewater are organics, Wastewater sources & characteristics: c. improve housekeeping around drying beds -pH is 7.2. Study Guides - Wastewater Operator Certification IEPA Topics Water Quality Wastewater Operator Certification Study Guides Exam Schedule Study Guides Class 1 Class 2 Class 3 Class 4 Operator-In-Training Class K - Industrial Collection System For more information contact: Dianne Potter at 217-782-9720 It doesn't appear in any feeds, and anyone with a direct link to it will see a message like this one. Odor Control: Wastewater Treatment Operator Certification Exam - 4 Practice Problems b. cyanide Which one of the following is not a major solids treatment method? a. screw feeder Calculate the BOD given the information: Initial DO: 8.3. Loading Rates. Wastewater Laboratory Analyst Certification Exam Practice. Following the activated sludge what process modification is very sensitive to bulking? by coe1069, (Time of day), Waste Treatment Ponds: Illinois EPA certifies the technical competency of . Cram has partnered with the National Tutoring Association, Conventional Wastewater Treatment Case Study, Lab Report: Phalyco-Chemical Characteristics Of Chemical Acid, How Does Hypochlorous Acid Affect A Swimming Pool. ._3Z6MIaeww5ZxzFqWHAEUxa{margin-top:8px}._3Z6MIaeww5ZxzFqWHAEUxa ._3EpRuHW1VpLFcj-lugsvP_{color:inherit}._3Z6MIaeww5ZxzFqWHAEUxa svg._31U86fGhtxsxdGmOUf3KOM{color:inherit;fill:inherit;padding-right:8px}._3Z6MIaeww5ZxzFqWHAEUxa ._2mk9m3mkUAeEGtGQLNCVsJ{font-family:Noto Sans,Arial,sans-serif;font-size:14px;font-weight:400;line-height:18px;color:inherit} (3) reddish brown, Activated Sludge: b. concentration Wastewater Operator Certification Exam Schedule You must have a Letter of Admission to take the wastewater operator examination. d. settleable solids, Activated Sludge: That may seem obvious but, too many people take the certification exam with little or no preparation. To go to the Class 2 & 3 Study Guide Click on above tab. at least two pipe diameters above the rim. Microorganisms that are methane fermenters will only produce in the pH range of, Sludge Digestion & Solids Handling: All I used were the study guide modules 1 and 2 on this website https://royceu.com/Public/PracticeQuizes.aspx I kept doing them until I was getting scores above 90. Activated Sludge Module 2 . 1 Study only Chapters 1 and 8 (Introduction to Wastewater Treatment, 1.1 through 1.9 and 8.3 through 8.5) of Book #1. PRACTICE EXAM 13-20 . Basic Chemistry: I got a book from WEF and studied a few online resources recommended on here. c. applying chlorine Solids removal from secondary effluent: 2,380 Gal./Min. Introduction to Water & Wastewater Treatment Technology - This course from Mountain Empire Community College includes 19 lessons tracing the flow of water from the source through treatment, storage, distribution, use, waste collection, treatment and discharge back into the environment. d. remove sludge digester, Odor Control: What is the expected range for the removal of settleable solids from a primary clarifier? This course includes the following lessons: System Design and Layout, Distribution Piping, Water Storage, Fire Hydrants and Valves, Water Meters, Pumps and Motors, Cross-Connection Control, Disinfection, Corrosion Control, Water Quality, Water Main Installation and Backfilling, Safety, Regulations, Hydraulics H}Wr8[$HB$"&.ZO*JJ4p8(To>|H^sGGrB*G*f%G. Sludge Digestion & Solids Handling: . ._3K2ydhts9_ES4s9UpcXqBi{display:block;padding:0 16px;width:100%} The current imbalance between legs of polyphase motors should never exceed____%, Maintenance: ._2cHgYGbfV9EZMSThqLt2tx{margin-bottom:16px;border-radius:4px}._3Q7WCNdCi77r0_CKPoDSFY{width:75%;height:24px}._2wgLWvNKnhoJX3DUVT_3F-,._3Q7WCNdCi77r0_CKPoDSFY{background:var(--newCommunityTheme-field);background-size:200%;margin-bottom:16px;border-radius:4px}._2wgLWvNKnhoJX3DUVT_3F-{width:100%;height:46px} This means that each wastewater treatment facility in Illinois is required to be operated by a wastewater operator who is certified at or above the certification level required for the treatment facility. DO Practice Tests. Another guy told me thats what he uses instead of the sacramento. CCWP - Need to know criteria and study resources PDF Wastewater Collection Practice Test #3 Page 1 of 26 - Sewer Geek Press question mark to learn the rest of the keyboard shortcuts, https://royceu.com/Public/PracticeQuizes.aspx. d. once every other day, Sludge Digestion & Solids Handling: c. volatile-acid-alkalinity ratio a. clarifier Which one of the following species is ozone? IL Water Operator Training | American Water College b. mineral oils Wastewater class 3 practice exam eXam Aswers Search Engine Submit Wastewater . Making water clean. c. a biological process 2,135 Gal./Min. This makes it harder to write exams. d. raw sewage. r.invoke.apply(r,arguments):r.queue.push(arguments)}, The passing grade is 70%. 3 stages If is not recommended to start up trickling filters in the _____(season) because bacteria are most ofter dormant at this time, Trickling Filters: I took the provided training seminars but with COVID they're all zoom . Virtual Water workshops meet from 1:00 p.m. to 4:00 p.m. Wastewater Solids Processing: When preparing a sample for laboratory analysis that involves acid and water, how should the sample be poured? The more practice exams you do, the less stress you will feel when taking the real exam. When I sat for the tests it had a completely different "feel" and higher level of complexity than what I studied for in the ABC. Disinfection: 0000000700 00000 n excessive slime growths on a trickling filter may cause a condition on the the filter called, Trickling Filters: I did my collection lvl4 and treatment lvl4, failed both, 8 year in the industry, tough exam. Which chemical in the following list is the strongest disinfectant? The examinations consist of multiple choice questions and essay questions designed to test your knowledge of the wastewater facilities for which you are seeking certification. Class 4 Study Guide Wastewater Operator Certification . The Wastewater Operator Certification Program is intended to protect public health, environmental quality, and the financial investment of wastewater facilities. Sludge Digestion & Solids Handling: ._3Qx5bBCG_O8wVZee9J-KyJ{border-top:1px solid var(--newCommunityTheme-widgetColors-lineColor);margin-top:16px;padding-top:16px}._3Qx5bBCG_O8wVZee9J-KyJ ._2NbKFI9n3wPM76pgfAPEsN{margin:0;padding:0}._3Qx5bBCG_O8wVZee9J-KyJ ._2NbKFI9n3wPM76pgfAPEsN ._2btz68cXFBI3RWcfSNwbmJ{font-family:Noto Sans,Arial,sans-serif;font-size:14px;font-weight:400;line-height:21px;display:-ms-flexbox;display:flex;-ms-flex-pack:justify;justify-content:space-between;-ms-flex-align:center;align-items:center;margin:8px 0}._3Qx5bBCG_O8wVZee9J-KyJ ._2NbKFI9n3wPM76pgfAPEsN ._2btz68cXFBI3RWcfSNwbmJ.QgBK4ECuqpeR2umRjYcP2{opacity:.4}._3Qx5bBCG_O8wVZee9J-KyJ ._2NbKFI9n3wPM76pgfAPEsN ._2btz68cXFBI3RWcfSNwbmJ label{font-size:12px;font-weight:500;line-height:16px;display:-ms-flexbox;display:flex;-ms-flex-align:center;align-items:center}._3Qx5bBCG_O8wVZee9J-KyJ ._2NbKFI9n3wPM76pgfAPEsN ._2btz68cXFBI3RWcfSNwbmJ label svg{fill:currentColor;height:20px;margin-right:4px;width:20px;-ms-flex:0 0 auto;flex:0 0 auto}._3Qx5bBCG_O8wVZee9J-KyJ ._4OtOUaGIjjp2cNJMUxme_{-ms-flex-pack:justify;justify-content:space-between}._3Qx5bBCG_O8wVZee9J-KyJ ._4OtOUaGIjjp2cNJMUxme_ svg{display:inline-block;height:12px;width:12px}._2b2iJtPCDQ6eKanYDf3Jho{-ms-flex:0 0 auto;flex:0 0 auto}._4OtOUaGIjjp2cNJMUxme_{padding:0 12px}._1ra1vBLrjtHjhYDZ_gOy8F{font-family:Noto Sans,Arial,sans-serif;font-size:12px;letter-spacing:unset;line-height:16px;text-transform:unset;--textColor:var(--newCommunityTheme-widgetColors-sidebarWidgetTextColor);--textColorHover:var(--newCommunityTheme-widgetColors-sidebarWidgetTextColorShaded80);font-size:10px;font-weight:700;letter-spacing:.5px;line-height:12px;text-transform:uppercase;color:var(--textColor);fill:var(--textColor);opacity:1}._1ra1vBLrjtHjhYDZ_gOy8F._2UlgIO1LIFVpT30ItAtPfb{--textColor:var(--newRedditTheme-widgetColors-sidebarWidgetTextColor);--textColorHover:var(--newRedditTheme-widgetColors-sidebarWidgetTextColorShaded80)}._1ra1vBLrjtHjhYDZ_gOy8F:active,._1ra1vBLrjtHjhYDZ_gOy8F:hover{color:var(--textColorHover);fill:var(--textColorHover)}._1ra1vBLrjtHjhYDZ_gOy8F:disabled,._1ra1vBLrjtHjhYDZ_gOy8F[data-disabled],._1ra1vBLrjtHjhYDZ_gOy8F[disabled]{opacity:.5;cursor:not-allowed}._3a4fkgD25f5G-b0Y8wVIBe{margin-right:8px} Keyword Glossary. _____? c. cyanides Study key C amp D IN gov. ISAWWA offers a full range of online classes, all approved by the IEPA with RTC hours. If the level falls in 10.3 min. d. DO. d. scum, Residual Solids Management: Basic Chemistry: Sedimentation and Flotation: WasteWater Operator Certification, Grade 2, Wastewater Treatment Facilities: Which type of feeder would most likely feed clear solutions? a. high sludge production Sludge Digestion & Solids Handling: The next Stage of treatment is the Secondary Treatment, or Biological. The exams are aimed at your overall knowledge and experience in the field as an operator, not just skills and experience of the system you are currently running. Name the solids treatment method that has a solids buildup which forms a blanket on the bottom and forces the water out due to compression? The exam consists of 100 multiple choice questions. These questions are similar to, but not the same as, the questions you are likely to encounter on your certification exam. Rotating Biological Contactors: Sample questions are provided for Classes I, II, III, and IV wastewater operator certification exams, so you can study the questions that are specific to your grade level. c. composting Water Treatment Certification practice tests, flashcards, study guides, and more. The color of the first RBC is___; the color of the second RBC is_____; and the color of the third RBS C is____, (1) gray MATERIAL AND METHODS Took the class III exam from the ABC program yesterday and felt very under knowledge. negative pole of an electrolytic cell or system, Unless water cooled, the operating temperature of a mechanical seal in a pump should never exceed. c. BOD acid fermentaters would predominate and pH would decrease, Sludge Digestion & Solids Handling: What is the solids treatment method that uses a chemicals and mixes the recycled flow with the process residual flow in a reactor? Hb```f``d30 P9eVcrV),VA`}. Reliability can only . Flashcards. Sedimentation and Flotation: There are 22 individual lesson modules included in this course. Water Environment Federation Bookstore. d. N2O. Alabama Department of Environmental Management b. flotation Only advice I can give is to expand your knowledge base by learning as much as you can about your field, either through University of Sacramento OWP or other correspondence courses. b. If a secondary clarifier has floatable debris in the effluent, what is the most likely cause? %PDF-1.2 Collection Class 3; Collection Class 4 - most advanced level Small wastewater system operators oversee wastewater systems serving fewer than 3,300 persons. c. sludge digester Wastewater Treatment Plant Operator Certification Training - Academia.edu What does the wastewater industry call sludge that is only partially digested? All occupied trenches 4 or more feet deep must provide exits at. d. about the same volume as the grit being removed. b. CO2 Create an account to follow your favorite communities and start taking part in conversations. The program suggests purchasing their books from Sacramento. All rights reserved. ABC Certification - Testing Services - Membership - Conference/Calendar - Certification Contacts - Continuing Education Review - About Us - Contact Us. b. toxic gases d. low operating costs, as they are east to run, Secondary Treatment: Because water samples sometimes require repeat or backup tests, the amount of sample that should collected for samples that are preserved and transported for any particular analysis should be at least____times the amount for those analysis, Effluent Disposal: Non -sewage: This is discharged by manufacturing processes and commercial enterprises. USE OF CALCULATORS ON THE EXAM 10 . Where would toxicants least likely cause a problem for a wastewater treatment plant? c. hypochlorite acid worked for me on the class IV. RoyCEU.com Continuing Education Which of the following groups of microorganisms are found in a good settling mixed liquor? PDF Illinois Environmental Protection Agency Bureau of Water Class 4 Study while the pump is running, what is the pump rate in GPM? Lab-Getting Trendy Complete the test and know your score instantly. Rotating biological contactors have all the following advantages except: .LalRrQILNjt65y-p-QlWH{fill:var(--newRedditTheme-actionIcon);height:18px;width:18px}.LalRrQILNjt65y-p-QlWH rect{stroke:var(--newRedditTheme-metaText)}._3J2-xIxxxP9ISzeLWCOUVc{height:18px}.FyLpt0kIWG1bTDWZ8HIL1{margin-top:4px}._2ntJEAiwKXBGvxrJiqxx_2,._1SqBC7PQ5dMOdF0MhPIkA8{vertical-align:middle}._1SqBC7PQ5dMOdF0MhPIkA8{-ms-flex-align:center;align-items:center;display:-ms-inline-flexbox;display:inline-flex;-ms-flex-direction:row;flex-direction:row;-ms-flex-pack:center;justify-content:center} ABC | Study Guides b. reduce turbulence ._2FKpII1jz0h6xCAw1kQAvS{background-color:#fff;box-shadow:0 0 0 1px rgba(0,0,0,.1),0 2px 3px 0 rgba(0,0,0,.2);transition:left .15s linear;border-radius:57%;width:57%}._2FKpII1jz0h6xCAw1kQAvS:after{content:"";padding-top:100%;display:block}._2e2g485kpErHhJQUiyvvC2{-ms-flex-align:center;align-items:center;display:-ms-flexbox;display:flex;-ms-flex-pack:start;justify-content:flex-start;background-color:var(--newCommunityTheme-navIconFaded10);border:2px solid transparent;border-radius:100px;cursor:pointer;position:relative;width:35px;transition:border-color .15s linear,background-color .15s linear}._2e2g485kpErHhJQUiyvvC2._3kUvbpMbR21zJBboDdBH7D{background-color:var(--newRedditTheme-navIconFaded10)}._2e2g485kpErHhJQUiyvvC2._3kUvbpMbR21zJBboDdBH7D._1L5kUnhRYhUJ4TkMbOTKkI{background-color:var(--newRedditTheme-active)}._2e2g485kpErHhJQUiyvvC2._3kUvbpMbR21zJBboDdBH7D._1L5kUnhRYhUJ4TkMbOTKkI._3clF3xRMqSWmoBQpXv8U5z{background-color:var(--newRedditTheme-buttonAlpha10)}._2e2g485kpErHhJQUiyvvC2._1asGWL2_XadHoBuUlNArOq{border-width:2.25px;height:24px;width:37.5px}._2e2g485kpErHhJQUiyvvC2._1asGWL2_XadHoBuUlNArOq ._2FKpII1jz0h6xCAw1kQAvS{height:19.5px;width:19.5px}._2e2g485kpErHhJQUiyvvC2._1hku5xiXsbqzLmszstPyR3{border-width:3px;height:32px;width:50px}._2e2g485kpErHhJQUiyvvC2._1hku5xiXsbqzLmszstPyR3 ._2FKpII1jz0h6xCAw1kQAvS{height:26px;width:26px}._2e2g485kpErHhJQUiyvvC2._10hZCcuqkss2sf5UbBMCSD{border-width:3.75px;height:40px;width:62.5px}._2e2g485kpErHhJQUiyvvC2._10hZCcuqkss2sf5UbBMCSD ._2FKpII1jz0h6xCAw1kQAvS{height:32.5px;width:32.5px}._2e2g485kpErHhJQUiyvvC2._1fCdbQCDv6tiX242k80-LO{border-width:4.5px;height:48px;width:75px}._2e2g485kpErHhJQUiyvvC2._1fCdbQCDv6tiX242k80-LO ._2FKpII1jz0h6xCAw1kQAvS{height:39px;width:39px}._2e2g485kpErHhJQUiyvvC2._2Jp5Pv4tgpAsTcnUzTsXgO{border-width:5.25px;height:56px;width:87.5px}._2e2g485kpErHhJQUiyvvC2._2Jp5Pv4tgpAsTcnUzTsXgO ._2FKpII1jz0h6xCAw1kQAvS{height:45.5px;width:45.5px}._2e2g485kpErHhJQUiyvvC2._1L5kUnhRYhUJ4TkMbOTKkI{-ms-flex-pack:end;justify-content:flex-end;background-color:var(--newCommunityTheme-active)}._2e2g485kpErHhJQUiyvvC2._3clF3xRMqSWmoBQpXv8U5z{cursor:default}._2e2g485kpErHhJQUiyvvC2._3clF3xRMqSWmoBQpXv8U5z ._2FKpII1jz0h6xCAw1kQAvS{box-shadow:none}._2e2g485kpErHhJQUiyvvC2._1L5kUnhRYhUJ4TkMbOTKkI._3clF3xRMqSWmoBQpXv8U5z{background-color:var(--newCommunityTheme-buttonAlpha10)} Past Exam Results. 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The color of the bio-film on a rotating biological contactor that has high sulfur concentrations would appear, Secondary Treatment:
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