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What are two of the most important safety concerns when entering a confined space?  \nA. Lack of oxygen and presence of hazardous gases  \nB. Chlorine residual and turbidity  \nC. Bad odours and claustrophobia  \nD. Very high or very low temperatures  \n2. What is the impact of lead in drinking water?  \nA. It causes staining of clothes  \nB. It causes filters to plug up  \nC. It is harmful to human health  \nD. It is corrosive  \n3. The most important reason for Operators to maintain the quality of drinking water is to:  \nA. Assure good public relations  \nB. Conform to standards imposed by the government  \nC. Prevent possible lawsuits  \nD. Safeguard public health  \n4. A reservoir has a width of 6 m and a length of 18 m. What is the area of the floor?  \nA. 104 m2  \nB. 108 m2  \nC. 184 m2  \nD. 204 m2  \n5. What is indicated if the chlorine demand suddenly jumps from 0.9 mg/L to 3.0 mg/L in a well supply?  \nA. More water is being pumped  \nB. Over chlorination  \nC. Possible contamination  \nD. Chlorine concentration is low  \n6. What must aerobic organisms have to live and multiply?  \nA. Oxygen  \nB. Hydrogen sulphide  \nC. Carbon monoxide  \nD. Methane  \n7. Check valves are used to:  \nA. Stop flow in any direction  \nB. Regulate flow velocity  \nC. Permit air to escape from the pipe  \nD. Permit flow in one direction only  \n8. When working with chemicals safe handling and first aid information can be found in what document?  \nA. Material Safety Data Sheet  \nB. Dangerous Goods Manifest  \nC. Operational Guidelines  \nD. Chemical Use Report  \n9. The inlet of a pump is called the:  \nA. Strainer  \nB. Suction  \nC. Discharge  \nD. Adaptor  \n10.Which of the following maintenance practices provides the best indication of the condition of a sewer pipe?  \nA. High pressure cleaning  \nB. Closed circuit camera inspection  \nC. Mechanical cleaning  \nD. Sewer lamping  \n11.Cross-connection between potable water supplies and sources of contamination such as wastewater must be prevented by:  \nA. Securing all influent and effluent valves  \nB. Two-way check valves  \nC. Protecting the plant from vandalism  \nD. An approved backflow prevention device  \n12.What is static head?  \nA. The energy of motion in the water  \nB. The pressure in the line due to friction  \nC. The pressure due to the elevation of the water  \nD. The pressure due to excess sludge  \n13.The most commonly used test to measure the organic strength of wastewater is:  \nA. The biochemical oxygen demand (BOD) test  \nB. The pH test  \nC. The total suspended solids (TSS) test  \nD. The chlorine residual test  \n14. During a 24-hour period, the minimum wastewater flow usually occurs closest to:  \nA. 12:00 hrs  \nB. 04:00 hrs  \nC. 09:00 hrs  \nD. 18:00 hrs  \n15.The wastewater level in a tank is dropping at a rate of 0.3 m/hr from an influent tank that is 9.6 m long, 7.6 m wide, and 4.6 m high. How many litres of wastewater flow out of the tank in one hour?  \nA. 2,650 L  \nB. 2,805 L  \nC. 17,328 L  \nD. 21,888 L  \n16.What is the most commonly used chemical for disinfection of water?  \nA. Ozone  \nB. Ultraviolet light  \nC. Sodium hypochlorite  \nD. Potassium permanganate  \n17.The chlorine dosage of a town’s water source if 8.0 mg/l. The chlorine demand for the water is 4.3 mg/l. What is the chlorine residual?  \nA. 0 mg/l  \nB. 0.3 mg/l  \nC. 3.7 mg/l  \nD. 7.3 mg/l  \n18.The discharge of an organic pollutant into a river will cause the depletion of:  \nA. Hardness  \nB. Temperature  \nC. Dissolved oxygen  \nD. Carbon dioxide  \n19. Chlorine gas is:  \nA. Lighter than air  \nB. Red in colour  \nC. Heavier than air  \nD. Pink in colour  \n20. Pressure is usually measured in:  \nA. BTU  \nB. MGD  \nC. Mg/L  \nD. PSI  \n21.Which Provincial/Territorial Ministry covers drinking water related regulations?  \nA. Environment  \nB. Health  \nC. Forests  \nD. Municipal  \n22.Watermains should be flushed:  \nA. Often enough to maintain water quality  \nB. Only when complaints are received  \nC. Weekly  \nD. Monthly  \n23.What type of plan is a wate","cbCaijJYoA6teNYu","https://ap.wps.com/l/cbCaijJYoA6teNYu","pdf",109904,"English","# OIT Sample Exam\n## Drinking water and wastewater operations\n## Safety, regulations, and calculations","[{\"question\":\"What are two key safety concerns when entering a confined space?\",\"answer\":\"The exam highlights lack of oxygen and the presence of hazardous gases.\"},{\"question\":\"How is chlorine demand related to chlorine residual in a water supply?\",\"answer\":\"Chlorine residual is determined by the chlorine source dosage minus the chlorine demand (e.g., 8.0 mg/L minus 4.3 mg/L yields the residual stated in the options).\"},{\"question\":\"Which document contains safe chemical handling and first aid information?\",\"answer\":\"The exam indicates the Material Safety Data Sheet (MSDS).\"}]","OIT Sample Exam - Study Questions | PDF",1790328378,13]