d. organic toxicants, Activated Sludge: Contact Andrea Rhodes b. F/M At what concentration level should dissolved oxygen be maintained during the initial start up of a oxidation ditch? 0000002114 00000 n A wastewater [plant has a train of three rotating biological contactor (RBC) units. How often should the oil be changed in the speed reducer of a rotating biological contactor? IEPA Frequently Asked Questions - http://www.epa.illinois.gov/topics/drinking-water/operator-certification/faq/index 2022 Water Operator Exam Schedule Still have questions not answered here?? d. phosphate-free surfactant, Activated Sludge: ABC wastewater exam class III : r/Wastewater. There are 22 individual lesson modules included in this course. Safety: Microorganisms that are methane fermenters will only produce in the pH range of, Sludge Digestion & Solids Handling: when one liquid is dissolved in another liquid it is called. directs raw and digested sludge mixture to a heating area. Water Environment Federation Bookstore. -high surface turbulence. a. Class 2 Wastewater Test Questions fullexams com. a. total solids + d. plunger feeder, Solids removal from secondary effluent: Pre-Lab Sedimentation and Flotation: What is the optimum temperature range of mesophile bacteria in anaerobic digestion? % Safety: b. trickling filter The color of the bio-film on a rotating biological contactor undergoing nitrification would appear? The ABC formula sheet is provided, and you must bring a non-programmable calculator. How far out from the water's edge should waste pond samples be collected? a. heavy metals 0000000607 00000 n What type of protozoa is typically associated with a poor treatment process and a young bio-solids age? Which type of feeder would most likely feed clear solutions? r.invoke.apply(r,arguments):r.queue.push(arguments)}, d. fats. 10 PPM. What is the most accurate measure of the organisms present in an aerator for treating incoming wastes? b. improve operations before digester b. decrease circulation also, i wouldn't be worried about retesting. Water Distribution Certification practice tests, flashcards, study guides, and more. 4 feet deep 8 feet deep 3 feet wide 7) A wet well is 9 feet deep by 21 feet in diameter. a. step aeration Odor Control: Along with the practice exam you will also be able to read and learn the secret of achieving top scores on the State Exam. The clarity of a chlorine contact basin's effluent is considered good when the "Secchi" disk can be read at a level of___ft, Ca Grade 2 Wastewater Treatment Operator Prac, Wastewater Treatment Operator Certification T, 3 , , WasteWater Operator Certification Study Guide, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer, Introduction to Chemical Engineering Thermodynamics, Hendrick Van Ness, J.M. 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. primary effluent Sludge Digestion & Solids Handling: Solids removal from secondary effluent: c. flammable oils These practice questions and answers are brought to you free of charge by RoyCEU.com. GLOSSARY OF WASTEWATER WORDS 22-28 . Math guides, tutorials, tips, and practice quizzes. Thanks for your reply! Chlorine disinfects water much slower at a pH around 7.0 than at a pH over 8.0. illinois class 4 wastewater practice test. The allowable frequency deviation above or below the value stamped on a motor's nameplate is_______%. Hb```f``d30 P9eVcrV),VA`}. Sludge Digestion & Solids Handling: Basic Chemistry: When an electrolyte is dissolved in water to form an ion, the ion is said to be________, Basic Chemistry: a. polishing pond Outline Monitor electrical equipment E.coli Test Operate safety equipment . Residual Solids Management: DERFSTA. For more practice problems: https://www.waterandwastewatercourses.com/To enroll in an online course: https://courses.waterandwastewatercourses.com/Grade 1: . by coe1069, Saprophytic microorganisms are also called: Sludge Digestion & Solids Handling: 4.5 in. Which one of the following species is ozone? Rotating Biological Contactors: That may seem obvious but, too many people take the certification exam with little or no preparation. The clarity of the effluent from an activated sludge process is considered good when the "Secchi" disk cab be read at a level of_______ft, Basic Chemistry: Activated Sludge: The industrial Class Kand 10 -WR (general) exam has a total of 14 questions, 7 multiple choice and 7 short answer/essay. These practice tests are a great study tool to add to your Water Distribution Operator Exam studying process. My tests are based off of ABC and Sacramento too. d. N2O. 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. PRACTICE EXAM 13-20 . c. sludge age Basic Chemistry: Sewer "B" has 94,875 people at What is "the" major factor in predicting the performance of wastewater clarifiers? 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 Activated Sludge: the clarifier is hydraulically overloaded, Effluent Disposal: How often should the motor bearings be greased in a rotating biological contactor unit? Class 3 & 4 Pre-Test Class 3 & 4 Study Guides include 2 pretests with answers, Class 3 size plants general knowledge information, and Class 3 & 4 Math questions. Wastewater sources & characteristics: Perfect for water distribution operators taking their D-1, D-2, D3 Operator exams (DI-DIII.) Which one of the following types of wastewater ponds listed below is not classified like the other three? Press question mark to learn the rest of the keyboard shortcuts, https://royceu.com/Public/PracticeQuizes.aspx. 0000001026 00000 n If power to a Test Center is temporarily interrupted during an administration, your examination will be restarted. Wastewater Tougher Questions wastewater grade 1 Wastewater Certification Grade 2 Flashcards Wastewater Grade 4 Questions Wastewater Grade 4 Questions by coe1069 , Mar. -the tank is exhibiting high rates of foaming. Please find links to the Certification Information Pages below for each state: Alabama - http://www.adem.state.al.us/programs/water/opcertification.cnt Alaska - d. organisms available to treat the wastes, Activated Sludge: c. applying chlorine c. temperature Typically, in the flotation thickening method, how much performance improvement (%) is the amount of solids for waste activated sludge realized when a polymer is added? ._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} Answer the following question to test your understanding of the . Wastewater Works Operator Class 4 Wastewater Treatment Operator Class I - 2017 Edition Wastewater Treatment Wastewater Treatment, Collection, Industrial . -high surface turbulence. typically, how often should sediment and drip traps be drained in cold water? Answers and references are included for questions. d. 100:12:5, Trickling Filters: Approved Environment, Inc. offers 50 online continuing education (CE) courses for water and wastewater. Sample Question. What do corbels provide in an anaerobic digester? c. add treatment chemicals me personally the Sacramento is way outdated, But I used the wastewater treatment fundamentals I&II textbook and passed my Class IV in Virginia on the first try. The program suggests purchasing their books from Sacramento. c. hypochlorite acid WEF/ABC/C 2 EP Wastewater Operators' Guide to Preparing for the Certification Examination. d. extended aeration activated sludge. b. BOD Always pour the acid into the water. Sorry, this post was deleted by the person who originally posted it. The exam questions were developed by experts in the wastewater field. The detention time for primary clarifiers usually has a range of_____hr/s, Wastewater Treatment Facilities: How often should flame arresters be service on anaerobic digesters? c. composting Basic Chemistry: VII. The most important factor in the high-rate process of anaerobic digestion is: d. activated sludge, Wastewater Treatment Facilities: The following are approved as reference sources for the 2017 ABC standardized wastewater treatment operator exams. c. vacuum filters c. BOD High suspended solids and BOD are most probably associated with which type of organisms? Took the class III exam from the ABC program yesterday and felt very under knowledge. DO Which one of the following solids treatment methods can be classified as both stabilization and dewatering? d. about the same volume as the grit being removed. What is the solids treatment method that uses a chemicals and mixes the recycled flow with the process residual flow in a reactor? Which one the following types of substances is corrosive and may interfere with biological treatment /Length 9 0 R too much lime has been added, reducing gas production. We'll bring you back here when you are done. The solids treatment method that usually dewaters solids by mixing them with a bulking agent, and then waiting for biological stabilization to occur is called________, Wastewater Solids Processing: Secondary Treatment: Phone (800) 666-0206. The demo is available to both certification programs and trainers to help prepare individuals for taking a computerized exam. Residual Solids Management: c. flammable oils b. oils and greases Press J to jump to the feed. a. pH What organism would most likely enhance the penetration of oxygen into the activated sludge, Rocks/Screens/Comminutors & Grit Removal: Test yourself before taking your state exam. Which one of the following parameters can be preserved for later lab analysis? a. clarifier c. lime stabilization b. COD Activated Sludge: An atmosphere is defined as oxygen deficient if it contains less than what % oxygen by volume? Safety: Sludge Digestion & Solids Handling: Given the following information: -aerobic digester dissolved oxygen level is at 3.5 mg/L. Sludge Digestion & Solids Handling: _____? If is not recommended to start up trickling filters in the _____(season) because bacteria are most ofter dormant at this time, Trickling Filters: 360mg/l. This class addresses all the test topics and provides the operators with all the study material necessary to prepare for the exam. Determine the percentage volatile suspended solids of a sample given the following data. Sludge Digestion & Solids Handling: You must sign in or sign up to start the quiz. Water and Wastewater Courses For Operator Certification. worked for me on the class IV. If the level falls in 10.3 min. If a secondary clarifier has floatable debris in the effluent, what is the most likely cause? Basic Chemistry: If a wastewater treatment plant has four aerobic digesters operated in series, which tank will exert the highest oxygen demand? a. sand drying beds Calculate the BOD given the information: Initial DO: 8.3. The course is designed to prepare operators for the Grade 2, 3, and 4 Alabama Wastewater Certification Exams. Basic Concepts. c. sludge digester Humus sludge is biomass from, Trickling Filters: Activated Sludge: I passed the next time. 0000045196 00000 n Residual Solids Management: -temperature is 19 degrees C. -specific oxygen uptake rate (SOUR) is 1.2mg/L O2/g/hr. I also recommend these practice test to my coworkers. If the sewer rate is $25 for the first 500ft and all wastewater generated over that amount is billed at the rate of $2.50 per 100ft3, how much would a customer generating 1200ft2 of wastewater be billed? Regarding waste pond lab sampling, which parameter is sampled at the influent of the pond? This solids treatment method maximizes the reduction of moisture and solids is called_______, Wastewater Solids Processing: What do roller guides provide in an anaerobic digester? If an activated sludge plant is hit with a high organic load, what will most like occur in the aeration tank? Royceu.com is where you wanna go. c. a biological process The Association Certification of Boards doesnt take all of their questions from one book, there are usually several books that they take information from and then compile an exam. Wastewater Collection Practice Test #3 Page 6 of 26 9) Sewer "A" has 106,000 people at 95 GPCD. No sweat, as my boss says, "how you suppose to know what to study if you haven't taken the test before". Safety: Activated Sludge Module 2 . What is the purpose of a draft tube in an anaerobic sludge digester? a. screw feeder Sludge Digestion & Solids Handling: The industrial Class K (facility-specific) exam has a total of 15 questions, 5 multiple choice short answer/essay. USE OF CALCULATORS ON THE EXAM 10 . ._1sDtEhccxFpHDn2RUhxmSq{font-family:Noto Sans,Arial,sans-serif;font-size:14px;font-weight:400;line-height:18px;display:-ms-flexbox;display:flex;-ms-flex-flow:row nowrap;flex-flow:row nowrap}._1d4NeAxWOiy0JPz7aXRI64{color:var(--newCommunityTheme-metaText)}.icon._3tMM22A0evCEmrIk-8z4zO{margin:-2px 8px 0 0} b. wet air oxidation To help you study for your wastewater treatment operator certification exam, here are four practice problems. Maintenance: ._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} The plant engineer estimates the machine has a useful life of 5 years and no salvage value. a. rotameter + Secondary Treatment: This test is designed to simulate the actual Wastewater exam as closely as possible. 0000045118 00000 n d. settleable solids, Activated Sludge: Another guy told me thats what he uses instead of the sacramento. .FIYolDqalszTnjjNfThfT{max-width:256px;white-space:normal;text-align:center} 2017 Wastewater Treatment Operator Class IV Wastewater Treatment Operator Formula/Conversion Table ABC standardized exams are administered with an ABC Formula/Conversion Table containing mathematical formulas and common abbreviations that may be present on the exam. h=e.getElementsByTagName("head")[0]||e.getElementsByTagName("script")[0].parentNode; What document provides a profile of hazardous substances and/or mixtures? Please take this quiz and check how well do you know about CA water treatment plant operator! MATERIAL AND METHODS Math questions include the method to solve. 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? Sludge Digestion & Solids Handling: 0000002075 00000 n Mixed liquor is a combination of what 3 things? a) 346.2 b) 2229 Off GPM 7207 c) 3.23 33.4 in. /*# sourceMappingURL=https://www.redditstatic.com/desktop2x/chunkCSS/IdCard.ea0ac1df4e6491a16d39_.css.map*/not saying the books aren't a great info source, cuz they are packed with it, but it is an overload for these tests. What substance can cause obstructions in the sewer system and may cause anaerobic decomposition where the substances accumulate? d. scum, Residual Solids Management: c. volatile-acid-alkalinity ratio Microbiology. The water quality parameters of pH and alkalinity and the presence of toxic substances can impact plant operation, because of their The more practice exams you do, the less stress you will feel when taking the real exam. Typically, an anaerobic digester will produce about 30%-35% by volume of which gas? VI. A solids treatment thickening process method would be V. WHAT OPERATORS NEED TO KNOW 3-9 . << In a small package, wastewater treatment plant, the operator should try to keep the dissolved oxygen in the aeration tank at approximately:____mg/L. Class 4 Study Guide Wastewater Operator Certification . A pond that depends on fermentation, is odorous, and is used mainly for processing industrial wastes is classified as, Waste Treatment Ponds: 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. which one of the following wastewater solids would most likely never end up on a dedicated land disposal (DLD) site? One solids treatment thickening process would be: Classes and seminars for water and Wastewater Certification. Please upgrade to Cram Premium to create hundreds of folders! What should be the color of an oxidation ditch that is working properly? What is the only acceptable breathing device to wear while handling chlorine leaks? Ponds used in series after a trickling filter are sometimes called? b. cyanide d. brown Class 4E On-Site Wastewater Certification Exam . ._3oeM4kc-2-4z-A0RTQLg0I{display:-ms-flexbox;display:flex;-ms-flex-pack:justify;justify-content:space-between} Basic Chemistry: Approved Training Provider - Indiana, Illinois, Ohio, Delaware, Alabama, Maryland, Idaho, North Carolina, South Carolina, Virginia, West Virginia, Tennessee and Kentucky. Safety: Sludge Digestion & Solids Handling: To what pH should wastewater be raised to halt sulfide production and inhibit sludge growth and biological slimes? Virtual Wastewater and Math Review workshops meet from 1:00 p.m. to 3:00 p.m. Illinois EPA certifies the technical competency of . Test 2 - banking. (TCs) that may be used to substitute for up to half of the required experience for Class 1, Class 2, and Class 3 Waterworks or Wastewater Works Operator licenses . -pH is 7.2. The full practice test is randomly generated from a database of hundreds of questions, meaning no two test are ever exactly the same. The best operation performance for an anaerobic digester is when it is feed What solid treatment method first uses chemicals as it conditions the solids and then later in the process, "throws" the solids out of the way is called_______, Wastewater Solids Processing: H2SO4. d. chemical oxidation. Approx. What is the solids treatment method that aerated the recycles water from the unit under pressure? 2014 Click to Rate "Hated It" Click to Rate "Didn't Like It" Find out how you can intelligently organize your Flashcards. What term describes the condition that exists when the source of the water supply is below the centerline of the pump? Class 4 Wastewater IL 4.0 (1 review) Term 1 / 88 What do you do if a sewer line is plugged? b. a little organic material American Water College. b. vibrating trough Water Treatment Practice Test - DEMO This 5 question practice test is a demo of the full, 100 question, practice test available to members. 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. Discussion of water and wastewater treatment processes and technology. c. increase mixing 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. Every test is created from a pool of possible water distribution questions. how much surface area of a rotating biological contactor is immerses in the wastewater? The least desirable control method for an anaerobic digester is the use of digester____ d. remove sludge from grit channel, Odor Control: What is the solids treatment method that chemically treats the residual flow, then spread evenly over a porous belt? Illinois EPA certifies the technical competency of operators of municipal and industrial wastewater treatment/pretreatment facilities and also administers a voluntary certification . The full practice test is randomly generated from a database of hundreds of questions, meaning no two test are ever exactly the same. Introducing Cram Folders! b. screenings 0000001315 00000 n STUDY STRATEGY 10-13 . Grade 4 Wastewater Certification Wastewater Extra Questions Grade 1 Wastewater certification review grade. This 5 question practice test is a demo of the full, 100 question, practice test available to members. d. DO. . a. incineration Safety: ABC's website provides Need to Know Criteria for exams. ._2ik4YxCeEmPotQkDrf9tT5{width:100%}._1DR1r7cWVoK2RVj_pKKyPF,._2ik4YxCeEmPotQkDrf9tT5{display:-ms-flexbox;display:flex;-ms-flex-align:center;align-items:center}._1DR1r7cWVoK2RVj_pKKyPF{-ms-flex-pack:center;justify-content:center;max-width:100%}._1CVe5UNoFFPNZQdcj1E7qb{-ms-flex-negative:0;flex-shrink:0;margin-right:4px}._2UOVKq8AASb4UjcU1wrCil{height:28px;width:28px;margin-top:6px}.FB0XngPKpgt3Ui354TbYQ{display:-ms-flexbox;display:flex;-ms-flex-align:start;align-items:flex-start;-ms-flex-direction:column;flex-direction:column;margin-left:8px;min-width:0}._3tIyrJzJQoNhuwDSYG5PGy{display:-ms-flexbox;display:flex;-ms-flex-align:center;align-items:center;width:100%}.TIveY2GD5UQpMI7hBO69I{font-size:12px;font-weight:500;line-height:16px;color:var(--newRedditTheme-titleText);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.e9ybGKB-qvCqbOOAHfFpF{display:-ms-flexbox;display:flex;-ms-flex-align:center;align-items:center;width:100%;max-width:100%;margin-top:2px}.y3jF8D--GYQUXbjpSOL5.y3jF8D--GYQUXbjpSOL5{font-weight:400;box-sizing:border-box}._28u73JpPTG4y_Vu5Qute7n{margin-left:4px} trailer << /Size 71 /Info 56 0 R /Root 59 0 R /Prev 99132 /ID[<188235b86438cd10632dbf081acd9545>] >> startxref 0 %%EOF 59 0 obj << /Type /Catalog /Pages 54 0 R /Metadata 57 0 R /PageLabels 52 0 R >> endobj 69 0 obj << /S 236 /L 297 /Filter /FlateDecode /Length 70 0 R >> stream They all produce high volumes of wastewater. Name the type of centrifuge that uses a knife or plow insertion to scrap off the "cake" from its walls? Classes will Start September 7, 2021 and meet twice per week (Tues & Thurs) for six weeks, ending on October 14, 2021. $25 b. support for the floating cover when it is at its lowest point. Math Smith, Michael Abbott. Waste Treatment Ponds: Jake ABC Certification - Testing Services - Membership - Conference/Calendar - Certification Contacts - Continuing Education Review - About Us - Contact Us. Sludge Digestion & Solids Handling: They helped me pass the level 4 wastewater operator test in New Mexico. 0000004525 00000 n If the primary sedimentation unit to a wastewater treatment plant has an H2S odor, what would be the most likely solution? c. tapered aeration When is the pH in a waste pond the lowest? b. concentration a.secondary clarification What is the ideal temperature range for methane-forming bacteria in anaerobic digesters? Most algae are in the____kingdom, Activated Sludge: c. COD a. hair Loading Rates. a. Add to folder d. have a density significantly greater than water, contain 20-25% nonvolatile inorganic matter. a. flotation d. flotation, Wastewater Solids Processing: b. nitrogen which type of centrifuge uses an other screw conveyor to move the solids to the discharge point? Where would toxicants least likely cause a problem for a wastewater treatment plant? May 7th, 2018 - Revised March 2003 Illinois Environmental Protection Agency Wastewater Operator Certification If this is your first exam attempt . d. temperature. .ehsOqYO6dxn_Pf9Dzwu37{margin-top:0;overflow:visible}._2pFdCpgBihIaYh9DSMWBIu{height:24px}._2pFdCpgBihIaYh9DSMWBIu.uMPgOFYlCc5uvpa2Lbteu{border-radius:2px}._2pFdCpgBihIaYh9DSMWBIu.uMPgOFYlCc5uvpa2Lbteu:focus,._2pFdCpgBihIaYh9DSMWBIu.uMPgOFYlCc5uvpa2Lbteu:hover{background-color:var(--newRedditTheme-navIconFaded10);outline:none}._38GxRFSqSC-Z2VLi5Xzkjy{color:var(--newCommunityTheme-actionIcon)}._2DO72U0b_6CUw3msKGrnnT{border-top:none;color:var(--newCommunityTheme-metaText);cursor:pointer;padding:8px 16px 8px 8px;text-transform:none}._2DO72U0b_6CUw3msKGrnnT:hover{background-color:#0079d3;border:none;color:var(--newCommunityTheme-body);fill:var(--newCommunityTheme-body)} When preparing a sample for laboratory analysis that involves acid and water, how should the sample be poured? Disinfection: 4 stages Post was not sent - check your email addresses! b. phosphoric acid How ofter should the drive bearings be greased in a rotating biological contactor unit? How many stages are usually present in the rotating biological contactor process? (Time of day), Waste Treatment Ponds: d. flood the filter. 100:5:1 a. incinerated material d. compost. b. twice per day ._9ZuQyDXhFth1qKJF4KNm8{padding:12px 12px 40px}._2iNJX36LR2tMHx_unzEkVM,._1JmnMJclrTwTPpAip5U_Hm{font-size:16px;font-weight:500;line-height:20px;color:var(--newCommunityTheme-bodyText);margin-bottom:40px;padding-top:4px;text-align:left;margin-right:28px}._2iNJX36LR2tMHx_unzEkVM{-ms-flex-align:center;align-items:center;display:-ms-flexbox;display:flex}._2iNJX36LR2tMHx_unzEkVM ._24r4TaTKqNLBGA3VgswFrN{margin-left:6px}._306gA2lxjCHX44ssikUp3O{margin-bottom:32px}._1Omf6afKRpv3RKNCWjIyJ4{font-size:18px;font-weight:500;line-height:22px;border-bottom:2px solid var(--newCommunityTheme-line);color:var(--newCommunityTheme-bodyText);margin-bottom:8px;padding-bottom:8px}._2Ss7VGMX-UPKt9NhFRtgTz{margin-bottom:24px}._3vWu4F9B4X4Yc-Gm86-FMP{border-bottom:1px solid var(--newCommunityTheme-line);margin-bottom:8px;padding-bottom:2px}._3vWu4F9B4X4Yc-Gm86-FMP:last-of-type{border-bottom-width:0}._2qAEe8HGjtHsuKsHqNCa9u{font-size:14px;font-weight:500;line-height:18px;color:var(--newCommunityTheme-bodyText);padding-bottom:8px;padding-top:8px}.c5RWd-O3CYE-XSLdTyjtI{padding:8px 0}._3whORKuQps-WQpSceAyHuF{font-size:12px;font-weight:400;line-height:16px;color:var(--newCommunityTheme-actionIcon);margin-bottom:8px}._1Qk-ka6_CJz1fU3OUfeznu{margin-bottom:8px}._3ds8Wk2l32hr3hLddQshhG{font-weight:500}._1h0r6vtgOzgWtu-GNBO6Yb,._3ds8Wk2l32hr3hLddQshhG{font-size:12px;line-height:16px;color:var(--newCommunityTheme-actionIcon)}._1h0r6vtgOzgWtu-GNBO6Yb{font-weight:400}.horIoLCod23xkzt7MmTpC{font-size:12px;font-weight:400;line-height:16px;color:#ea0027}._33Iw1wpNZ-uhC05tWsB9xi{margin-top:24px}._2M7LQbQxH40ingJ9h9RslL{font-size:12px;font-weight:400;line-height:16px;color:var(--newCommunityTheme-actionIcon);margin-bottom:8px}