activated sludge in an aeration tank c. tapered aeration An atmosphere is defined as oxygen deficient if it contains less than what % oxygen by volume? the Illinois EPA requires that routine bacteria samples to be taken and analyzed how often. a. incinerated material Introducing Cram Folders! a. gray a. gravity Class 2 Wastewater Test Questions fullexams com. Wastewater Class 2 multiple choice. d. preaeration. b. flotation You have already completed the quiz before. Activated Sludge: What class of fire involves sodium and magnesium? Activated Sludge: The full practice test is randomly generated from a database of hundreds of questions, meaning no two test are ever exactly the same. 14/08/2014 Sludge Digestion & Solids Handling: d. once every other day, Sludge Digestion & Solids Handling: . If power to a Test Center is temporarily interrupted during an administration, your examination will be restarted. Hence you can not start it again. What is the expected range for the removal of settleable solids from a primary clarifier? how much surface area of a rotating biological contactor is immerses in the wastewater? To see these classes - CLICK HERE. What do skirts provide in anaerobic digesters? 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. f. white, Odor Control: Usually, what is the % accuracy of a graduated cylinder and burette? CA Grade 4 amp 5 Wastewater Math Part 2 of 3 YouTube. c. green TABLE OF CONTENTS . a. no organics Just wanted to make sure Im looking at the right tests/guides. Most algae are in the____kingdom, Activated Sludge: Rotating Biological Contactors: c. rotating feeder The effluent from which process is called mixed liquor I did my collection lvl4 and treatment lvl4, failed both, 8 year in the industry, tough exam. d. dissolved oxygen, Wastewater Solids Processing: Please upgrade to Cram Premium to create hundreds of folders! The color of the bio-film on a rotating biological contactor undergoing nitrification would appear? Activated Sludge: that is they must test what they are supposed to test. I found a lot of the 3 questions were around anaerobic digestion so I focused a lot on that and it helped me pass. Its a 2 year old post and have then since passed my 3 and ready to take my 4 next year. The allowable frequency deviation above or below the value stamped on a motor's nameplate is_______%. Activated Sludge Module 2 . 0000000607 00000 n 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: Pool Chemistry worked for me on the class IV. Where is the best place to collect scum from wastewater plants that use aerobic digesters? How often should the oil in the chain casing be changed? Wastewater sources & characteristics: 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. Please sign in to share these flashcards. d. fats. 2,135 Gal./Min. Class 4E On-Site Wastewater Certification Exam . When inserting glass tubing into a rubber hose or stopper, never use____for lubrication, Basic Chemistry: }(window,document,"script","https://cdn.feathr.co/js/boomerang.min.js","feathr"); 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: Which one of the following is the best type of valve to use to dampen a water hammer? For an examinee or testing client unfamiliar with the Association of Boards of Certification's computerized exams, Experience ABC's Computerized Exams gives a closer look. d. organisms available to treat the wastes, Activated Sludge: what would happen if too much sludge was added to an anaerobic digester? _____? V. WHAT OPERATORS NEED TO KNOW 3-9 . Test yourself before taking your state exam. Sludge Digestion & Solids Handling: All rights reserved. 4 At what depth should samples be collected from a waste pond? Hb```f``d30 P9eVcrV),VA`}. c. hypochlorite acid There are 22 individual lesson modules included in this course. Find out how you can intelligently organize your Flashcards. Verified questions. d. composting, Wastewater Solids Processing: What do corbels provide in an anaerobic digester? The most common flow-measure device for wastewater is a_____, Wastewater Treatment Facilities: PRACTICE EXAM 13-20 . b. wet air oxidation 2,323 Gal./Min. All occupied trenches 4 or more feet deep must provide exits at. Certification Exam Prep; Continuing Education; Certificate Program; Utility Management The RX Drug Company has just purchased a capsulating machine for $76,000. -high surface turbulence. Odor Control: Rotating biological contactors have all the following advantages except: 0000001315 00000 n True. Wastewater treatment systems protect public health and the environment only if they are being properly operated and maintained. The water quality parameters of pH and alkalinity and the presence of toxic substances can impact plant operation, because of their I was successful writing my level III Water Distribution but it too had a lot of questions about water treatment, cross connection control, GIS systems, blueprints, dosages etc. What does the wastewater industry call sludge that is only partially digested? a. gravity Another name for a waste stabilization pond is, Wastewater sources & characteristics: 0000001005 00000 n Add to folder a. screw feeder (hint: the elements social CHAPTER THREE Disinfection: a. airstream treatment Best of luck you! Residual Solids Management: ISAWWA offers a full range of online classes, all approved by the IEPA with RTC hours. b. they can handle a large range of flows a. several times a day 10 7. If there is a leak from a valve on a sulfur dioxide tank and the lead is found using ammonia, what color will the vapor fumes be? This test is designed to simulate the actual Wastewater exam as closely as possible. WasteWater Operator Certification, Grade 2, Wastewater Treatment Facilities: Digestion is working properly if the volatile solids content of the raw sludge has been reduced by ___-___%, Sludge Digestion & Solids Handling: a. organic toxicants Disinfection: 50 terms. /Filter /FlateDecode Sludge Digestion & Solids Handling: what type of waste solids would most likely be sent to a rendering reclamation? Press question mark to learn the rest of the keyboard shortcuts, https://royceu.com/Public/PracticeQuizes.aspx. a. chlorine 3 Study only Chapter 16 (Laboratory Procedures and Chemistry) of Book #2. c. increase mixing Water Treatment Practice Test - DEMO This 5 question practice test is a demo of the full, 100 question, practice test available to members. Study materials to help you succeed. The panel is comprised of 8 experts who Please take this quiz and check how well do you know about CA water treatment plant operator! Wastewater Practice Test - DEMO This 5 question practice test is a demo of the full, 100 question, practice test available to members. The Examination Request for Wastewater Operator Certification must be submitted for a Letter of Admission to be issued. b. filter presses .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} ._1QwShihKKlyRXyQSlqYaWW{height:16px;width:16px;vertical-align:bottom}._2X6EB3ZhEeXCh1eIVA64XM{margin-left:3px}._1jNPl3YUk6zbpLWdjaJT1r{font-size:12px;font-weight:500;line-height:16px;border-radius:2px;display:inline-block;margin-right:5px;overflow:hidden;text-overflow:ellipsis;vertical-align:text-bottom;white-space:pre;word-break:normal;padding:0 4px}._1jNPl3YUk6zbpLWdjaJT1r._39BEcWjOlYi1QGcJil6-yl{padding:0}._2hSecp_zkPm_s5ddV2htoj{font-size:12px;font-weight:500;line-height:16px;border-radius:2px;display:inline-block;margin-right:5px;overflow:hidden;text-overflow:ellipsis;vertical-align:text-bottom;white-space:pre;word-break:normal;margin-left:0;padding:0 4px}._2hSecp_zkPm_s5ddV2htoj._39BEcWjOlYi1QGcJil6-yl{padding:0}._1wzhGvvafQFOWAyA157okr{font-size:12px;font-weight:500;line-height:16px;border-radius:2px;margin-right:5px;overflow:hidden;text-overflow:ellipsis;vertical-align:text-bottom;white-space:pre;word-break:normal;box-sizing:border-box;line-height:14px;padding:0 4px}._3BPVpMSn5b1vb1yTQuqCRH,._1wzhGvvafQFOWAyA157okr{display:inline-block;height:16px}._3BPVpMSn5b1vb1yTQuqCRH{background-color:var(--newRedditTheme-body);border-radius:50%;margin-left:5px;text-align:center;width:16px}._2cvySYWkqJfynvXFOpNc5L{height:10px;width:10px}.aJrgrewN9C8x1Fusdx4hh{padding:2px 8px}._1wj6zoMi6hRP5YhJ8nXWXE{font-size:14px;padding:7px 12px}._2VqfzH0dZ9dIl3XWNxs42y{border-radius:20px}._2VqfzH0dZ9dIl3XWNxs42y:hover{opacity:.85}._2VqfzH0dZ9dIl3XWNxs42y:active{transform:scale(.95)} If an activated sludge plant is hit with a high organic load, what will most like occur in the aeration tank? Every test is created from a pool of possible water distribution questions. a. detergent by coe1069, Safety: 4.5 in. Smith, Michael Abbott. Sludge Digestion & Solids Handling: Activated Sludge: Influent BOD testing will allow monitoring of F/M ratio and plant organic loading. b. gravity Standards of conduct and practice were revised to exclude marijuana-related drug distribution misdemeanor convictions from convictions that a regulant must report to the Board. Complete the test and know your score instantly. Approved Training Provider - Indiana, Illinois, Ohio, Delaware, Alabama, Maryland, Idaho, North Carolina, South Carolina, Virginia, West Virginia, Tennessee and Kentucky. When the pump is not running, the water rises in 3 min. If a wastewater treatment plant has four aerobic digesters operated in series, which tank will exert the highest oxygen demand? Sludge Digestion & Solids Handling: Given the following information: -aerobic digester dissolved oxygen level is at 3.5 mg/L. c. sludge age d. 8 stages, Rotating Biological Contactors: Chlorine gas has a specific gravity of, Rocks/Screens/Comminutors & Grit Removal: Class 4 Study Guide Wastewater Operator Certification . I also recommend these practice test to my coworkers. a. improve housekeeping Final DO: 5.9. b. F/M Which one the following types of substances is corrosive and may interfere with biological treatment Maintenance: This stage takes care of the dissolved organic matter that escapes the primary stage. How many steps are the in coagulation? ._3-SW6hQX6gXK9G4FM74obr{display:inline-block;vertical-align:text-bottom;width:16px;height:16px;font-size:16px;line-height:16px} a. heat treatment 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: d. N2O. d. low operating costs, as they are east to run, Secondary Treatment: Humus sludge is biomass from, Trickling Filters: Rainwater runoff is also considered as w Name ____________________________________ A solids treatment thickening process method would be How much of the solids should be wasted each week in the summer form a package wastewater treatment plant for the best quality? Sewer "B" has 94,875 people at b. improve operations before digester -pH is 7.2. c. BOD Practice Exam #1 Practice Exam #1 - Answers Practice Exam #2 - Answers Practice Exam #2 Practice Exam #1 - Answers Illinois Rural Water Association 3305 Kennedy Road; PO Box 49 Taylorville, IL 62568 Phone: 217-287-2115 Fax: 217-824-8638 Email: ilrwa@ilrwa.org (b) What is the magnification of the image of the fish? -the tank is exhibiting high rates of foaming. d. about the same volume as the grit being removed. the books are a tad overkill for the ABC tests. Safety: d. belt presses, Wastewater Solids Processing: Wastewater Solids Processing: Good luck. Wide, and 14 ft. The full practice test is randomly generated from a database of hundreds of questions, meaning no two test are ever exactly the same. If the primary sedimentation unit to a wastewater treatment plant has an H2S odor, what would be the most likely solution? 0000001026 00000 n d. chemical addition with counter masking or masking agents, chemical addition with counter masking or masking agents. Which property uniquely identifies a chemical element? . /*# 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. b. bleach Our proven study tools will prepare you to take the Water Treatment, Water Distribution and Wastewater Operator exams with confidence. The current imbalance between legs of polyphase motors should never exceed____%, Maintenance: Need-to-Know Criteria outline the content that will be covered on the 2017 ABC standardized exams. excessive slime growths on a trickling filter may cause a condition on the the filter called, Trickling Filters: Flow Patterns. the clarifier is hydraulically overloaded, Effluent Disposal: Which one of the following ius the least important in the successful operation of an activated sludge plant? Pre-Lab Currently the Collection Systems, the Class 4, Class 3, Class 2 and the Class 1 exam have 100 questions each. typically, how often should sediment and drip traps be drained in cold water? a. thickening How often should the oil be changed in the speed reducer of a rotating biological contactor? Sludge Digestion & Solids Handling: 1. b. vacuum filters Which type of feeder would most likely feed clear solutions? Approximately what % of the dissolved solids in wastewater are organics, Wastewater sources & characteristics: Another solids treatment thickening process would be: Process wastewater can Mr Jose d. organic toxicants, Activated Sludge: What do ballast blocks provide in anaerobic digesters? 58 0 obj << /Linearized 1 /O 60 /H [ 700 326 ] /L 100420 /E 48024 /N 15 /T 99142 >> endobj xref 58 13 0000000016 00000 n Approx. The City of Prattville is offering a new wastewater certification exam preparation course. The exam questions were developed by experts in the wastewater field. We'll bring you back here when you are done. 0000004525 00000 n VI. Wastewater Laboratory Analyst Certification Exam Practice. what % of the dissolved solids in wastewater are inorganics, Wastewater sources & characteristics: c. lime stabilization b. phosphoric acid also, i wouldn't be worried about retesting. What organism would most likely enhance the penetration of oxygen into the activated sludge, Rocks/Screens/Comminutors & Grit Removal: During the exam, . Of the following, which is the least important nutrient in wastewater treatment for microorganisms to reproduce? Compute the depreciation schedule using: (a) Straight-line depreciation (b) Sum-of-years'-digits depreciation (c) Double declining balance depreciation (assume any remaining depreciation is claimed in the last year). b. BOD ._1aTW4bdYQHgSZJe7BF2-XV{display:-ms-grid;display:grid;-ms-grid-columns:auto auto 42px;grid-template-columns:auto auto 42px;column-gap:12px}._3b9utyKN3e_kzVZ5ngPqAu,._21RLQh5PvUhC6vOKoFeHUP{font-size:16px;font-weight:500;line-height:20px}._21RLQh5PvUhC6vOKoFeHUP:before{content:"";margin-right:4px;color:#46d160}._22W-auD0n8kTKDVe0vWuyK,._244EzVTQLL3kMNnB03VmxK{display:inline-block;word-break:break-word}._22W-auD0n8kTKDVe0vWuyK{font-weight:500}._22W-auD0n8kTKDVe0vWuyK,._244EzVTQLL3kMNnB03VmxK{font-size:12px;line-height:16px}._244EzVTQLL3kMNnB03VmxK{font-weight:400;color:var(--newCommunityTheme-metaText)}._2xkErp6B3LSS13jtzdNJzO{-ms-flex-align:center;align-items:center;display:-ms-flexbox;display:flex;margin-top:13px;margin-bottom:2px}._2xkErp6B3LSS13jtzdNJzO ._22W-auD0n8kTKDVe0vWuyK{font-size:12px;font-weight:400;line-height:16px;margin-right:4px;margin-left:4px;color:var(--newCommunityTheme-actionIcon)}._2xkErp6B3LSS13jtzdNJzO .je4sRPuSI6UPjZt_xGz8y{border-radius:4px;box-sizing:border-box;height:21px;width:21px}._2xkErp6B3LSS13jtzdNJzO .je4sRPuSI6UPjZt_xGz8y:nth-child(2),._2xkErp6B3LSS13jtzdNJzO .je4sRPuSI6UPjZt_xGz8y:nth-child(3){margin-left:-9px} At what concentration level should dissolved oxygen be maintained during the initial start up of a oxidation ditch? c. flammable oils Illinois EPA certifies the technical competency of . Jake ._12xlue8dQ1odPw1J81FIGQ{display:inline-block;vertical-align:middle} -temperature is 19 degrees C. -specific oxygen uptake rate (SOUR) is 1.2mg/L O2/g/hr. The last stage is the treatment of RMW. The recommended minimum depth for a waste pond is". 2 Class 4E . Rotating Biological Contactors: c. O3 Electrical units operating in areas exposed to flammable vapors should_______. they prevent the cover from scraping the sidewall. c. flammable oils When preparing a sample for laboratory analysis that involves acid and water, how should the sample be poured? Discussion of water and wastewater treatment processes and technology. Water and Wastewater Microbiology" Secondary Treatment: Sedimentation and Flotation: c. a biological process Which organism would most probably be associated with high suspended solids and biochemical oxygen demand (BOD). c. solids concentration 2017 Wastewater Treatment Operator Formula/Conversion Table + 23BIbVc^(2el!jO1gXFi!20IIew"-bRZ\Z 1mnH35_l^tE+SedZIinbz0FQ&|Y1la@YuGfrg|I-'6s @LYiFag6Td[l\* I took the provided training seminars but with COVID they're all zoom . Disinfection: !function(f,e,a,t,h,r){if(!f[h]){r=f[h]=function(){r.invoke? What solids treatment method removes 100% of the pathogens, water, and organics (UV is not the answer), Residual Solids Management: Answer the following question to test your understanding of the . 0000045118 00000 n Wastewater Operator Certification Exam Book List. Monitor electrical equipment E.coli Test Operate safety equipment . b. vibrating trough Mixed liquor is a combination of what 3 things? d. heavy metals, Activated Sludge: a.complete mix aeration Activated Sludge: 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. b. Campus Box 1075 - Southern Illinois Univ. Basic Chemistry: b. hypochlorous acid . c. power requirements are low Under which of the following conditions should sludge wasting normally be increased? udDNW|'Z[V2Lj$h>-}ToIYPcXpj$c[1s;Hu'wg>{h<3B~l8io\M,J1?euZ1!j@Pk*DZWGBiNw+EE'jY?Qz\Vvr}W[Z RkGnW\Vq:G\n^6qAaVWn,v 9V;-zlpEp"Kp Is the following substances likely to serve as an oxidant or a reductant: A scuba diver wears a diving mask with a face plate that bulges outward with a radius of curvature of 0.5m0.5 \mathrm{~m}0.5m. There is thus a convex spherical surface between the water and the air in the mask. It makes it a lot more challenging when, say, your system is just lagoons and they are asking questions about advanced processes. d. acids and alkalies, Activated Sludge: They helped me pass the level 4 wastewater operator test in New Mexico. b. too much lime has been added, reducing gas production. The demo is available to both certification programs and trainers to help prepare individuals for taking a computerized exam. Demo: Experience ABC's Computerized Exams. Create an account to follow your favorite communities and start taking part in conversations. @keyframes ibDwUVR1CAykturOgqOS5{0%{transform:rotate(0deg)}to{transform:rotate(1turn)}}._3LwT7hgGcSjmJ7ng7drAuq{--sizePx:0;font-size:4px;position:relative;text-indent:-9999em;border-radius:50%;border:4px solid var(--newCommunityTheme-bodyTextAlpha20);border-left-color:var(--newCommunityTheme-body);transform:translateZ(0);animation:ibDwUVR1CAykturOgqOS5 1.1s linear infinite}._3LwT7hgGcSjmJ7ng7drAuq,._3LwT7hgGcSjmJ7ng7drAuq:after{width:var(--sizePx);height:var(--sizePx)}._3LwT7hgGcSjmJ7ng7drAuq:after{border-radius:50%}._3LwT7hgGcSjmJ7ng7drAuq._2qr28EeyPvBWAsPKl-KuWN{margin:0 auto} d. plunger feeder, Solids removal from secondary effluent: To go to the Class 2 & 3 Study Guide Click on above tab. Residual Solids Management: a. heavy metals A pond that depends on fermentation, is odorous, and is used mainly for processing industrial wastes is classified as, Waste Treatment Ponds: In a small package, wastewater treatment plant, the operator should try to keep the dissolved oxygen in the aeration tank at approximately:____mg/L. Which one of the following methods would not be used to feed DRY chemicals? (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 . Classes will Start September 7, 2021 and meet twice per week (Tues & Thurs) for six weeks, ending on October 14, 2021. Water Treatment Certification practice tests, flashcards, study guides, and more. a. heavy metals Bacteria in an anaerobic digester will effectively utilize: d. chemical oxidation. they prevent foaming in the annular space. VII. The best operation performance for an anaerobic digester is when it is feed Press J to jump to the feed. Contact Andrea Rhodes View the 2020-2021 wastewater exam summary statistics of quarterly exam results HERE. Need to know criteria. Operators should use special precautions when placing anaerobically digested sludge on a drying bed because sludge contains what gas? d. activated sludge, Wastewater Treatment Facilities: Sorry, your blog cannot share posts by email. Which one of the following best defines the term stray-current corrosion? now if it's bomb after bombeh, i might make ya take a break for a bit before going again. b. vibrating trough Tightened down to a drip. d. scum, Residual Solids Management: Sludge Digestion & Solids Handling: 3 stages 2014. a. flush out distributor arms What substance can cause obstructions in the sewer system and may cause anaerobic decomposition where the substances accumulate? The next Stage of treatment is the Secondary Treatment, or Biological. a. increase air in aeration system I passed the next time. a. conventional modification Read more ISBN-10 1583217282 ISBN-13 978-1583217283 Edition Spi Publisher Solids removal from secondary effluent: If the sludge drying beds had a decaying odor, what would be the most likely solution? When the influent load to a wastewater treatment plant changes rapidly, the best test to control purposes is d. incineration, Wastewater Solids Processing: Sludge Digestion & Solids Handling: Wastewater Certification Information By State October 30, 2018 We have many people contact us regarding Wastewater Operator Certification in many states. b. COD Operators should, as a rule, never change the temperature in an anaerobic digester by more than___degrees F/day. c. carbon in organic matter Find out how you can intelligently organize your Flashcards. That may seem obvious but, too many people take the certification exam with little or no preparation. 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?? 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: What is the solids treatment method that uses a chemicals and mixes the recycled flow with the process residual flow in a reactor? What modified activated sludge process does not require primary treatment? b. are more fibrous .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} b. nitrogen d. remove sludge from grit channel, Odor Control: a)Clean settling basins and dispose of sludge. What is the purpose of a draft tube in an anaerobic sludge digester? By measuring the pump output. c. 100:10:3 primary effluent The detention time for primary clarifiers usually has a range of_____hr/s, Wastewater Treatment Facilities: a. BOD 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? Given the following information: -aerobic digester dissolved oxygen level is at 3.5 mg/L. b. complete mix aeration To what pH should wastewater be raised to halt sulfide production and inhibit sludge growth and biological slimes? Along with the practice exam you will also be able to read and learn the secret of achieving top scores on the State Exam.