illinois class 4 wastewater practice test

They helped me pass the level 4 wastewater operator test in New Mexico. Usually, what is the % accuracy of a graduated cylinder and burette? 360mg/l. They all produce high volumes of wastewater. It doesn't appear in any feeds, and anyone with a direct link to it will see a message like this one. the Illinois EPA requires that routine bacteria samples to be taken and analyzed how often. New Sacramento books tend to cover a lot of stuff that you will see on ABC course, but exams will ask you for a very specific thing that youre most likely to skip in the book heh. Activated Sludge: a. contain 20-25% nonvolatile inorganic matter Basic Wastewater Operator Practice Exam Class 3 Flashcards CCWP - Need to know criteria and study resources they prevent foaming in the annular space. Influent BOD testing will allow monitoring of F/M ratio and plant organic loading. 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. b. bleach a. reducing the number if weeds %PDF-1.2 Each question has been validated through a process of panel review. Along with the practice exam you will also be able to read and learn the secret of achieving top scores on the State Exam. Click the card to flip Definition 1 / 88 Look for a manhole with reduced or no flow when the manhole upstream is flowing full Click the card to flip Flashcards Learn Match Created by cshe1736 Terms in this set (88) . (hint: the elements social CHAPTER THREE Please select the correct language below. We weren't able to detect the audio language on your flashcards. Wastewater Treatment Practice Exam | Technical Learning College What is the most accurate measure of the organisms present in an aerator for treating incoming wastes? MATERIAL AND METHODS ._3bX7W3J0lU78fp7cayvNxx{max-width:208px;text-align:center} Which one the following types of substances is corrosive and may interfere with biological treatment Campus Box 1075 - Southern Illinois Univ. return sludge/raw wastewater, Activated Sludge: Activated Sludge: WATER DISTRIBUTION OPERATOR CERTIFICATION EXAM - 4 PRACTICE - YouTube 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. feathr("sprinkle", "page_view"); -the tank is exhibiting high rates of foaming. (2) reddish brown g.async=!0,g.src=t,h.appendChild(g)} d. about the same volume as the grit being removed. What is WEF? Sludge Digestion & Solids Handling: Collection Class 3; Collection Class 4 - most advanced level Small wastewater system operators oversee wastewater systems serving fewer than 3,300 persons. the floating cover on an anaerobic should be inspected how often? Alabama Department of Environmental Management ._38lwnrIpIyqxDfAF1iwhcV{background-color:var(--newCommunityTheme-widgetColors-lineColor);border:none;height:1px;margin:16px 0}._37coyt0h8ryIQubA7RHmUc{margin-top:12px;padding-top:12px}._2XJvPvYIEYtcS4ORsDXwa3,._2Vkdik1Q8k0lBEhhA_lRKE,.icon._2Vkdik1Q8k0lBEhhA_lRKE{border-radius:100%;box-sizing:border-box;-ms-flex:none;flex:none;margin-right:8px}._2Vkdik1Q8k0lBEhhA_lRKE,.icon._2Vkdik1Q8k0lBEhhA_lRKE{background-position:50%;background-repeat:no-repeat;background-size:100%;height:54px;width:54px;font-size:54px;line-height:54px}._2Vkdik1Q8k0lBEhhA_lRKE._1uo2TG25LvAJS3bl-u72J4,.icon._2Vkdik1Q8k0lBEhhA_lRKE._1uo2TG25LvAJS3bl-u72J4{filter:blur()}.eGjjbHtkgFc-SYka3LM3M,.icon.eGjjbHtkgFc-SYka3LM3M{border-radius:100%;box-sizing:border-box;-ms-flex:none;flex:none;margin-right:8px;background-position:50%;background-repeat:no-repeat;background-size:100%;height:36px;width:36px}.eGjjbHtkgFc-SYka3LM3M._1uo2TG25LvAJS3bl-u72J4,.icon.eGjjbHtkgFc-SYka3LM3M._1uo2TG25LvAJS3bl-u72J4{filter:blur()}._3nzVPnRRnrls4DOXO_I0fn{margin:auto 0 auto auto;padding-top:10px;vertical-align:middle}._3nzVPnRRnrls4DOXO_I0fn ._1LAmcxBaaqShJsi8RNT-Vp i{color:unset}._2bWoGvMqVhMWwhp4Pgt4LP{margin:16px 0;font-size:12px;font-weight:400;line-height:16px}.icon.tWeTbHFf02PguTEonwJD0{margin-right:4px;vertical-align:top}._2AbGMsrZJPHrLm9e-oyW1E{width:180px;text-align:center}.icon._1cB7-TWJtfCxXAqqeyVb2q{cursor:pointer;margin-left:6px;height:14px;fill:#dadada;font-size:12px;vertical-align:middle}.hpxKmfWP2ZiwdKaWpefMn{background-color:var(--newCommunityTheme-active);background-size:cover;background-image:var(--newCommunityTheme-banner-backgroundImage);background-position-y:center;background-position-x:center;background-repeat:no-repeat;border-radius:3px 3px 0 0;height:34px;margin:-12px -12px 10px}._20Kb6TX_CdnePoT8iEsls6{-ms-flex-align:center;align-items:center;display:-ms-flexbox;display:flex;margin-bottom:8px}._20Kb6TX_CdnePoT8iEsls6>*{display:inline-block;vertical-align:middle}.t9oUK2WY0d28lhLAh3N5q{margin-top:-23px}._2KqgQ5WzoQRJqjjoznu22o{display:inline-block;-ms-flex-negative:0;flex-shrink:0;position:relative}._2D7eYuDY6cYGtybECmsxvE{-ms-flex:1 1 auto;flex:1 1 auto;overflow:hidden;text-overflow:ellipsis}._2D7eYuDY6cYGtybECmsxvE:hover{text-decoration:underline}._19bCWnxeTjqzBElWZfIlJb{font-size:16px;font-weight:500;line-height:20px;display:inline-block}._2TC7AdkcuxFIFKRO_VWis8{margin-left:10px;margin-top:30px}._2TC7AdkcuxFIFKRO_VWis8._35WVFxUni5zeFkPk7O4iiB{margin-top:35px}._1LAmcxBaaqShJsi8RNT-Vp{padding:0 2px 0 4px;vertical-align:middle}._2BY2-wxSbNFYqAy98jWyTC{margin-top:10px}._3sGbDVmLJd_8OV8Kfl7dVv{font-family:Noto Sans,Arial,sans-serif;font-size:14px;font-weight:400;line-height:21px;margin-top:8px;word-wrap:break-word}._1qiHDKK74j6hUNxM0p9ZIp{margin-top:12px}.Jy6FIGP1NvWbVjQZN7FHA,._326PJFFRv8chYfOlaEYmGt,._1eMniuqQCoYf3kOpyx83Jj,._1cDoUuVvel5B1n5wa3K507{-ms-flex-pack:center;justify-content:center;margin-top:12px;width:100%}._1eMniuqQCoYf3kOpyx83Jj{margin-bottom:8px}._2_w8DCFR-DCxgxlP1SGNq5{margin-right:4px;vertical-align:middle}._1aS-wQ7rpbcxKT0d5kjrbh{border-radius:4px;display:inline-block;padding:4px}._2cn386lOe1A_DTmBUA-qSM{border-top:1px solid var(--newCommunityTheme-widgetColors-lineColor);margin-top:10px}._2Zdkj7cQEO3zSGHGK2XnZv{display:inline-block}.wzFxUZxKK8HkWiEhs0tyE{font-size:12px;font-weight:700;line-height:16px;color:var(--newCommunityTheme-button);cursor:pointer;text-align:left;margin-top:2px}._3R24jLERJTaoRbM_vYd9v0._3R24jLERJTaoRbM_vYd9v0._3R24jLERJTaoRbM_vYd9v0{display:none}.yobE-ux_T1smVDcFMMKFv{font-size:16px;font-weight:500;line-height:20px}._1vPW2g721nsu89X6ojahiX{margin-top:12px}._pTJqhLm_UAXS5SZtLPKd{text-transform:none} I also recommend these practice test to my coworkers. Which one of the following is not a major solids treatment method? Environmental Resources Training Center - Certification - SIUE Water Distribution Certification practice tests, flashcards, study guides, and more. The exam consists of 100 multiple choice questions. Practice Tests. Sedimentation and Flotation: Sedimentation and Flotation: What should be the color of an oxidation ditch that is working properly? Wastewater Operator Certification Exam Book List. h=e.getElementsByTagName("head")[0]||e.getElementsByTagName("script")[0].parentNode; Class 4 Wastewater IL Flashcards | Quizlet Study Guides - Wastewater Operator Certification - Illinois If an activated sludge plant is hit with a high organic load, what will most like occur in the aeration tank? When the pump is not running, the water rises in 3 min. What is the chemical formula for sulfuric acid? Secondary Treatment: What class of fire involves sodium and magnesium? 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 If the ponds or lagoons had an ammonia odor, what would be the most likely solution? Wastewater Class 2 multiple choice. Test takers are allowed three hours to complete the exam. Given the following information: -aerobic digester dissolved oxygen level is at 3.5 mg/L. 2017 Wastewater Treatment Operator Formula/Conversion Table Water and Wastewater Microbiology" a. screenings . ABC's website provides Need to Know Criteria for exams. Deep. Which organism would most probably be associated with high suspended solids and biochemical oxygen demand (BOD). d. low operating costs, as they are east to run, Secondary Treatment: stream 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? c. rotating feeder PDF Illinois Environmental Protection Agency Bureau of Water Class 4 Study . Southern Illinois Univ. What do skirts provide in anaerobic digesters? -high surface turbulence. Grade 4 Wastewater Certification Flashcards - Cram.com a. detergent Disinfection: IX. Odor Control: c. add treatment chemicals The purpose of adding sodium thiosulfate to a microbiological sample bottle is to. Mar. d. have a density significantly greater than water, contain 20-25% nonvolatile inorganic matter. Following the activated sludge what process modification is very sensitive to bulking? At what depth should samples be collected from a waste pond? Each of the Practice Exams is a multiple choice test (50 questions). c. secondary sludge When is the pH in a waste pond the lowest? typically, how often should sediment and drip traps be drained in cold water? Jake What should the initial depth of sludge from a digester be when it is placed in a sludge drying bed? Water Operator Certification Study Guide The water quality parameters of pH and alkalinity and the presence of toxic substances can impact plant operation, because of their The solids treatment method usually dewaters solids by mixing them with a bulking agent and then waiting for biological stabilization to occur? .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} d. temperature. Reliability can only . Activated Sludge: b. toxic gases Best of luck you! d. organisms available to treat the wastes, Activated Sludge: The purpose of the treatment is to change the biological composition or the characteristics of the waste so that it Wastewater can be formed from domestic, industrial, agricultural, commercial activities or any combination of these. What is the purpose of a draft tube in an anaerobic sludge digester? c. complex mix aeration a.secondary clarification Wastewater Treatment Operator Certification Exam - 4 Practice Problems Water and Wastewater Courses 6.18K subscribers Subscribe 86K views 5 years ago For practice exams:. 14 sec. True. 100:5:1 Residual Solids Management: Safety: Basic Chemistry: 3 stages Primary treatment is not required in which modified activated sludge process? Sludge Digestion & Solids Handling: Need-to-Know Criteria outline the content that will be covered on the 2017 ABC standardized exams. b. phosphoric acid 10 PPM. Milliliters of sample used: 2. If the gas pressure in a digester is lower than normal, what is the most probable cause? Bacteria in an anaerobic digester will effectively utilize: ._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} Basic Chemistry: Rotating Biological Contactors: Online Activities & Resources - Kansas Rural Water Association Class 4E On-Site Wastewater Certification Exam . d. raw sewage. Water Treatment Certification practice tests, flashcards, study guides, and more. a. screw feeder Every test is created from a pool of possible water distribution questions. 0000001026 00000 n Sedimentation and Flotation: I took the provided training seminars but with COVID they're all zoom . Demo: Experience ABC's Computerized Exams. activated sludge in an aeration tank This 5 question practice test is a demo of the full, 100 question, practice test available to members. Under which of the following conditions should sludge wasting normally be increased? a) 346.2 b) 2229 Off GPM 7207 c) 3.23 33.4 in. This course will prepare you to pass your entry level wastewater treatment operator exam with confidence and get you started on your way to a successful and satisfying career in wastewater treatment. a. nitrate The responses provided up to the point of interruption will be What is the only acceptable breathing device to wear while handling chlorine leaks? Water Operator Practice Tests - Water Nuggets d. temperature. PDF Wastewater Collections Grade 2 Practice Test California Effluent Disposal: High suspended solids and BOD are most probably associated with which type of organisms? We'll bring you back here when you are done. When is the pH in a waste pond the highest? (22.60 g 21.03 g) (21.75 g 21.03 g), Click to share on LinkedIn (Opens in new window), Click to share on Twitter (Opens in new window), Click to share on Facebook (Opens in new window), Click to share on Pinterest (Opens in new window), Click to email this to a friend (Opens in new window), Practice Question: Temperature Affect on Denitrification, Practice Question: Water System Evaluation. a. gravity At what concentration level should dissolved oxygen be maintained during the initial start up of a oxidation ditch? Took the class III exam from the ABC program yesterday and felt very under knowledge. Sludge Digestion & Solids Handling: d. DO. Incoming Wastewater Testing Monitoring of influent wastewater is an important component of operating an activated sludge plant. In general, secondary sludges: 2. oxidation pond Unfortunately my state uses the ABC program from California to acquire licenses. 0000001543 00000 n If a secondary clarifier has floatable debris in the effluent, what is the most likely cause? Class K Study Guide Industrial Wastewater Operator Certification . Contact Andrea Rhodes How do you calibrate a chemical feed pump? STUDY STRATEGY 10-13 . THESE ARE TO HELP YOU LEARN AND APPLY THE CONCEPTS THAT WILL HELP YOU PASS A STATE EXAM. b. improve operations before digester The Wastewater Practice exam is temporarily out of service for upgrades. Water Treatment Quizzes & Trivia - ProProfs Another name for a waste stabilization pond is, Wastewater sources & characteristics: Basic Concepts. d. remove sludge digester, Odor Control: Certification testing is offered as a computer-based test. American Water College. Sludge Digestion & Solids Handling: Sludge Digestion & Solids Handling: Activated Sludge: ._12xlue8dQ1odPw1J81FIGQ{display:inline-block;vertical-align:middle} Chlorine disinfects water much slower at a pH around 7.0 than at a pH over 8.0. Water Environment Federation Bookstore. Wastewater Practice Test - Water Operator Certification Study Guide The next Stage of treatment is the Secondary Treatment, or Biological. b. decanter Effluent Disposal: b. using masking agents @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} VI. What would be the cause of a shorted-winding in a motor? Edwardsville, IL 62026-1075 (618) 650-2030 . This class addresses all the test topics and provides the operators with all the study material necessary to prepare for the exam. 2,323 Gal./Min. primary effluent Test 2 - banking. 0000000700 00000 n 8 0 obj b. toxic gases Water and Wastewater Microbiology" /Filter /FlateDecode Another solids treatment thickening process would be: USE OF CALCULATORS ON THE EXAM 10 . How often should the oil be changed in the speed reducer of a rotating biological contactor? 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. Class 4 Study Guide Wastewater Operator Certification . -all blowers are running. d. 100:12:5, Trickling Filters: Colorado uses the 2019 edition of standard, sequential examinations developed by the Association of Boards of Certification (ABC) for all classes of certificates, except Classes "S" and "T" which are custom exams. Wastewater Grade 2 t f Flashcards Quizlet. The most common imbalance in the operation of an anaerobic sludge digester is, Sludge Digestion & Solids Handling: 2,135 Gal./Min. d. chemical oxidation. The ABC formula sheet is provided, and you must bring a non-programmable calculator. 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? Waste Treatment Ponds: Create an account to follow your favorite communities and start taking part in conversations. When the influent load to a wastewater treatment plant changes rapidly, the best test to control purposes is What is the acceptable sulfur dioxide level in mg/L in wastewater plant effluent? Adequate ___BOD, ____nitrogen, ____Phosphorous ratio for microorganisms to grow is usually !function(f,e,a,t,h,r){if(!f[h]){r=f[h]=function(){r.invoke? b. twice per day d)Test start standby pimps, motors and generators. c. DO 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? Microbiology. TABLE OF CONTENTS . Sludge Digestion & Solids Handling: d. phosphorous, Activated Sludge: What should be the air gap separation between a potable water pipe and the rim of a wastewater tank? Monitor electrical equipment E.coli Test Operate safety equipment . Sludge Digestion & Solids Handling: The effluent from which process is called mixed liquor a. BOD Odor Control: 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: Activated Sludge: Approx. c. orifice Hydrogen Sulfide will exist in a system depending on the presence or absence of_____. What do ballast blocks provide in anaerobic digesters? Safety: Mixed liquor is a combination of what 3 things? Digestion is working properly if the volatile solids content of the raw sludge has been reduced by ___-___%, Sludge Digestion & Solids Handling: d. organic toxicants, Activated Sludge: Math guides, tutorials, tips, and practice quizzes. that is they must test what they are supposed to test. Study Guides - Water Treat Tech d. activated sludge, Wastewater Treatment Facilities: What solids treatment method removes 100% of the pathogens, water, and organics (UV is not the answer), Residual Solids Management: What document provides a profile of hazardous substances and/or mixtures? This stage takes care of the dissolved organic matter that escapes the primary stage. b. wet air oxidation (Time of day), Waste Treatment Ponds: b. are more fibrous If the sludge drying beds had a decaying odor, what would be the most likely solution? Microorganisms that are methane fermenters will only produce in the pH range of, Sludge Digestion & Solids Handling: How much of the solids should be wasted each week in the summer form a package wastewater treatment plant for the best quality? 2017 Wastewater Treatment Operator Formula/Conversion Table. c. about half the volume as the grit being removed r.queue=[],r.loaded=1*new Date,r.version="1.0.0", Proper flow velocity through a grit channel is indicated when the grit being removed contains Keyword Glossary. Press J to jump to the feed. Complete the test and know your score instantly. d. incineration 14/08/2014 Wastewater Operator Certification Study Guide Spi Edition 0000001180 00000 n 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. WEF/ABC/C 2 EP Collection Systems Operators' Guide to Preparing for the Certification Examination. How many steps are the in coagulation? These practice tests are a great study tool to add to your Water Distribution Operator Exam studying process. what would happen if too much sludge was added to an anaerobic digester? }(window,document,"script","https://cdn.feathr.co/js/boomerang.min.js","feathr"); Wastewater Certification Information By State a)Clean settling basins and dispose of sludge. what would be the best solution if the volatile-acid-to-alkalinity ratio increased to 0.3 in a digester due to pumping thin sludge? .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} a. incinerated material Operators should use special precautions when placing anaerobically digested sludge on a drying bed because sludge contains what gas? illinois class 4 wastewater practice test. The process that uses heat to selectively destroy undesirable organisms is called: Disinfection: Phone (800) 666-0206. d. hydrogen sulfide. Safety: proper operation. a. nitric acid All rights reserved. What type of fire extinguishers should be used on electrical fires? ._3oeM4kc-2-4z-A0RTQLg0I{display:-ms-flexbox;display:flex;-ms-flex-pack:justify;justify-content:space-between} Find out how you can intelligently organize your Flashcards. 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