Wwa Guides d'étude, Notes de cours & Résumés

Which disinfectant would work best against cryptosporidium? - Ozone The pH of a water sample is greater that the pHs so the Langlier index? - Indicates the water is scale forming. When water high in calcium bicarbonate is softened by ion exchange - Sodium bicarbonate remains in the product water. Lime softening can effectively disinfect water because: - The pH level is higher than 10.5 A noncarbonate hardness compound is - MgSO4 What term refers to the reintroduction of carbon dioxide int...

Spontaneous combustion can occur if activated carbon is mixed with... - Potassium permanganate If chemical solutions gets on a person's skin, the area should be flushed _______________, and if the chemical dust are inhaled ______________________. - with large quantities of water, consult a physician immediately Who esablishes MCLs? - State and federal regulations If a filter's turbidity exceeds _____ NTU in the first 4 hours of a given filter run for two consecutive _________samples, th...

Adaptive plants - Answer-Non-indigenous plants that easily adapt to the climate and thus require little or no supplemental irrigation once established. Adjusted water budget - Answer-an amount of water used to maintain a landscape that is based on area and evapotranspiration rate. American National Standards Institute (ANSI) - Answer-an association involved in developing standards for a wide range of products including plumbing fixtures. American Society of Mechanical Engineers (ASME) - An...

AWWA ABC Water Distribution Grades 1 & 2 Exam 2024 ...

AWWA ABC Water Distribution Grades 1 & 2 Questions and Answers with Certified Solutions Which agency sets legal limits on the concentration levels of harmful contaminants in potable water distributed to customers? US Environmental Protection Agency The number of monthly distributions system bacteriologiacal samples required is Based on the population served What is the maximum contaminant level for total trihalomethanes (TTHM) in the united States? 0.080 mg/L Under the Surface Water Tre...

Water Treatment Operator Certification Exam (AWWA) Questions and Answers Latest 2024/2025 with complete solution

A watercourse that flows continuously at all times of the year is known as what? - Perennial stream What is defined as 'the killing or inactivation of pathogenic organisms in water'? - Disinfection Free chlorine residual values are based on a contact time of how long? - 10 mins What time of day does algae cause the pH of the water decrease? - Night time What contributes to the creation of algae blooms? - Increased nutrients What is found mainly in groundwater sources and forms a precipit...

Which agency sets legal limits on the concentration levels of harmful contaminants in potable water distributed to customers? - US Environmental Protection Agency The number of monthly distributions system bacteriologiacal samples required is - Based on the population served What is the maximum contaminant level for total trihalomethanes (TTHM) in the united States? - 0.080 mg/L Under the Surface Water Treatment Rule, disinfection residuals must be collected at the same location in the di...

Which agency sets legal limits on the concentration levels of harmful contaminants in potable water distributed to customers? - US Environmental Protection Agency The number of monthly distributions system bacteriologiacal samples required is - Based on the population served What is the maximum contaminant level for total trihalomethanes (TTHM) in the united States? - 0.080 mg/L Under the Surface Water Treatment Rule, disinfection residuals must be collected at the same location in the di...

AWWA WSO Water Treatment Grades 3&4