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Topics include what details must appear on sample labels, common disinfecting agents, chlorine dose versus residual concepts, pump capacity and elevated-tank pressure, tank freezing prevention, and steps to avoid contamination. Additional items cover sampling technique for bacteriological analysis, operational duties for operators, cleaning and disinfection frequency, cross-connections, truck tank requirements, vehicle inspections, and water-hose sanitation thresholds.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":20,"@type":76,"position":81},"https://docshare.wps.com/document/exam/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/sample-exam-december-2020-practice-questions/490234/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/sample-exam-december-2020-practice-questions/490234.png","ImageObject",300,407,{"name":92,"@type":93},"Aurelia","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-21","2026-10-01",true,{"@type":102,"interactionType":103,"userInteractionCount":39},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What information should always be included on a sample label?","Question",{"text":112,"@type":113},"The label must include the date, time, and location of the sample collection.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"Which disinfecting agent is most commonly used?",{"text":117,"@type":113},"Sodium hypochlorite is indicated as the most commonly used disinfecting agent.",{"name":119,"@type":110,"acceptedAnswer":120},"How should hoses, nozzles, and couplers be disinfected?",{"text":121,"@type":113},"They should be disinfected using a chlorine solution of at least 50 mg/L.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},490234,1791163043,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":19,"category_name":20,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":39,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":29,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":143,"read_time":144,"preview_page_count":4},1099514068365,"https://ap-avatar.wpscdn.com/avatar/10000253d8d9f28188e?_k=1776742907772140068","BWD Sample Exam  \n1. Which of the following should always be included on a sample label?  \nA. The name or initials of the person running the analysis  \nB. The weather conditions when the sample was collected  \nC. The date, time, and location of the sample collection  \nD. The name and address of the treatment facility  \n2. The most commonly used disinfecting agent is:  \nA. Sodium hypochlorite  \nB. Sodium thiosulphate  \nC. Ammonia  \nD. Sodium chloride  \n3. What is the difference in the amount of chlorine applied and the residual chorine remaining after a period of time called?  \nA. Demand  \nB. Dosage  \nC. Residual  \nD. Remainder  \n4. No water is being added to a rectangular storage tank that is 3 metres wide by 6 metres long. A pump lowers the water level by 1 metre in one hour. What is the pump capacity in litres per second?  \nA. 0.71 L/sec  \nB. 2.36 L/sec  \nC. 5.00 L/sec  \nD. 7.89 L/sec  \n5. The water level in an elevated tank is 30 metres above the ground surface. The resultant pressure at a tap on a line at the ground level is  \nA. 103.4 kPa  \nB. 224.1 kPa  \nC. 294.2 kPa  \nD. 517.1 kPa  \n6. How many litres of 12% sodium hypochlorite would be needed to disinfect a water tank with a chlorine residual of 25 ppm if the tank is 3 m long and 150 cm in diameter?  \nA. 1.1 L  \nB. 4.8 L  \nC. 22 L  \nD. 48 L  \n7. Over a 4-year period, the hour meter on a pump had the following readings at the end of each year  \n▪  \n▪  \n▪  \n▪  \n1st year 2nd year 3rd year 4th year  \n976.3 1,325.8 2,100.1  \n2,371.4  \nHow many hours did the pump run during the third year?  \nA. 349.5 hours  \nB. 364.3 hours  \nC. 774.3 hours  \nD. 830.2 hours  \n8. Freezing of water tanks in the winter can be minimized by  \nA. Continuous pumping and changing drawdown  \nB. Raising the chlorine residual  \nC. Lowering the chlorine residual  \nD. Painting the tank a dark colour  \n9. What needs to be done to a storage tank to protect the water from contamination?  \nA. It should be constructed below the ground surface  \nB. It should be provided with an air-tight seal  \nC. It should have cathodic protection  \nD. It should have screened vents and overflows  \n10.Turbidity refers to the   of the water.  \nA. Clarity (cloudiness)  \nB. Odour  \nC. Pressure  \nD. Temperature  \n11.What should an operator do when taking a sample from an inside tap for bacteriological analysis?  \nA. Always rinse out the bottle with water before taking the sample  \nB. Let the water run for several minutes before filling the bottle  \nC. Take no special precautions in order to have a more representative sample  \nD. Take the sample as quickly as possible after the tap is turned on  \n12.Why should a bulk water delivery operator measure and record all truckloads?  \nA. To monitor the water usage, production, and loss  \nB. To recycle and reuse the water  \nC. To provide documentation for increasing the system’s budget  \nD. To provide information for insurance records  \n13.The operator of a water delivery truck must clean and disinfect all internal areas of the tank at least:  \nA. Once every 3 months  \nB. Once every 6 months  \nC. Once every 9 months  \nD. Once every 12 months  \n14. How long can drinking water be retained in a delivery truck?  \nA. Up to 12 hours  \nB. Up to 24 hours  \nC. Up to 48 hours  \nD. Up to one week provided the truck has been disinfected  \n15.What is the difference between a total coliforms and an E.coli test?  \nA. The total coliform test indicates possible contamination and the E.coli test indicates if the contamination originates from animals or humans  \nB. There is really no difference in what these two tests indicate, and either is acceptable  \nC. Total coliform test are for the presence of pathogenic organisms and E.coli test indicates how many are present  \nD. The E.coli test results are always higher than the total coliform test results  \n16.What is a cross-connection?  \nA. A physical connection between a potable and non-potable water supply  \nB. A special type of tap for the outdoors  \nC. When tw","cbCaimJuSWpYkMP5","https://ap.wps.com/l/cbCaimJuSWpYkMP5","pdf",129916,"English","# Questions\n## Sampling and labeling\n## Disinfection and chlorine management\n## Water storage, pumping, and pressure\n## Contamination prevention and tank protection\n## Bacteriological testing and operator duties\n## Water delivery infrastructure and inspections","[{\"question\":\"What information should always be included on a sample label?\",\"answer\":\"The label must include the date, time, and location of the sample collection.\"},{\"question\":\"Which disinfecting agent is most commonly used?\",\"answer\":\"Sodium hypochlorite is indicated as the most commonly used disinfecting agent.\"},{\"question\":\"How should hoses, nozzles, and couplers be disinfected?\",\"answer\":\"They should be disinfected using a chlorine solution of at least 50 mg/L.\"}]","Sample Exam - December 2020 - Practice Questions | PDF",1790834555,15]