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12 Cards in this Set
- Front
- Back
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Who should conduct sanitary Surveys? A. People trained in phone and in person Survey techniques B. People trained in wastewater collection and treatment C. People trained in public health engineering and the epidemiology of waterborne diseases D. People trained in water treatment plant design and construction |
People trained in public health engineering and the epidemiology of waterborne diseases |
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What are water rights? A. Correct methods of treatment B. Permission to discharge water C. Permission to use water D. Ownership of water |
Permission to use water |
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What is stratification in lakes and reservoirs? A. Lake turnover due to temperature changes B. Breezes starting the circulation of surface water C. Uniform water temperature profile from surface to bottom D. Formation of separate layers of temperature, plant life, or animal life |
Formation of separate layers of temperature, plant life, or animal life |
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What causes the elevation and slope of water tables and artesian pressure levels to change? A. Collection of water in a Reservoir B. Pollution from agricultural activities C. Seasonal variations in the supply of water D. Selection of intake structures |
Seasonal variations in the supply of water |
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How extensive should the treatment be for reclaimed water? A. Depends on the NPDES permit B. Depends on the funds available for treatment C. Depends on climate conditions at point of use D. Depends on potential exposure to the public |
Depends on potential exposure to the public |
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Which is one characteristic of a community water system? A. Regularly serves fewer than 25 full time residents B. Regularly serves at least 25 people who are non residents C. Regularly serves fewer than 25 of the same individuals D. Regularly serves at least 25 full time residents |
Regularly serves at least 25 full time residents |
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What is not a chemical disinfectant? A. Bromine B. Sodium hydroxide C. Ozone D. Carmine |
Carmine |
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What is not a type of physical disinfectant? A. Ultrasonic waves B. Heat C. Ultraviolet rays D. Chlroine |
D. Chlorine |
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What is a limitation of prechlorination? A. May increase the formation of trihalomethanes in raw water B. May control mudball formation C. May increase chlorine contact time D. May control algae and slime growths |
May increase the formation of trihalomethanes in raw water |
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If consumers complain about chlorine tastes in their drinking water, what is the most likely cause of this problem? A. The chlorine dose is inadequate B. The chlorine does was added too late in the treatment process C. The chlorine does is too high D. The chlorine does is the wrong mix of chemicals |
The chlorine dose is inadequate |
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What is a disadvantage of using chlorine dioxide for disinfection? A. Chlorine dioxide costs are higher than other more commonly used disinfection methods B. Chlorine dioxide is much more effective than chlorine in killing bacteria in the pH range from 8 to 10 C. Chlorine dioxide is effective in killing bacteria and viruses D. Trihalomethanes are not formed when disinfecting with chlorine dioxide |
Chlorine dioxide costs are higher than other more commonly used disinfection methods |
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Which item is not included in a chlorine safety program? A. Oral rules and safety procedures B. Self-contained breathing apparatus C. Atmospheric monitoring devices D. Leak detection equipment |
Oral rules and safety procedures |
