Maximum contaminant level Study guides, Class notes & Summaries

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

How many years of experience must an operator have to be a grade D Operator - Answer 12 months of operating and maintenance experience in a distribution system serving 1000 people or more Disinfection means - Answer inactivation of pathogenic organisms in the water potable water is - Answer water which meets the requirements established by Subpart 5-1 of the New York State Sanitary code What is an MCL? - Answer Maximum Contaminant Level What is the minimum residual allowed at...

What is the federal law that protects public water supplies from harmful contaminants? - Answer- SDWA Safe Drinking Water Act MCL stands for - Answer- Maximum Contaminant Level True or False? Primary regulations are mandatory - Answer- TRUE Secondary regulations are about what 3 things? - Answer- Taste Odor Color of water True or False? Secondary regulations are mandatory - Answer- FALSE What is the minimum pressure that must be maintained at all times in a distribution sy...

Water Distribution Grades 1 & 2 Practice test exam latest Which agency sets legal limits on the concentration levels of harmful contaminants in potable water distributed to customers? - CORRECT ANSWER-US Environmental Protection Agency The number of monthly distributions system bacteriologiacal samples required is - CORRECT ANSWER-Based on the population served What is the maximum contaminant level for total trihalomethanes (TTHM) in the united States? - CORRECT ANSWER-0.080 mg/L Un...

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...

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

Demonstration and Research Pest Control Latest Update Graded A+ Federal Insecticide Fungicide and Rodenticide Act FIFRA "any substance or mixture of substances intended for preventing, destroying, repelling, or mitigating and pest" Pesticide "any substance or mixture of substances intended for use as a plant regulator, defoliant, or desiccant." Pesticide Pesticides that are generally more acutely toxic and inhibit a vital physiological process. Broad spectrum Broad spectru...

The number of monthly distributions system bacteriologiacal samples required is - ANSWER-Based on the population served What is the maximum contaminant level for total trihalomethanes (TTHM) in the united States? - ANSWER-0.080 mg/L Under the Surface Water Treatment Rule, disinfection residuals must be collected at the same location in the distribution system as - ANSWER-coliform samples Iron can cause "red water" and thus customer complaints when its concentration is above its second...

TCEQ Class D Water Operator Questions with Correct Answers What are some physical characteristics of water? - Temperature, turbidity, color, taste, odor What are some chemical characteristics of water? - Hardness, pH, solids, and gases What is turbidity? - the amount of suspended matter, such as clay, silt, organic matter, and microorganisms in water T/F Water is never found pure in nature. - True Is turbidity more of a problem in groundwater or surface water? - Surface water ...

What are some physical characteristics of water? - Answer Temperature, turbidity, color, taste, odor What are some chemical characteristics of water? - Answer Hardness, pH, solids, and gases What is turbidity? - Answer the amount of suspended matter, such as clay, silt, organic matter, and microorganisms in water T/F Water is never found pure in nature. - Answer True Is turbidity more of a problem in groundwater or surface water? - Answer Surface water A system's filtered water m...