AWWA

How closely an instrument measures the true or actual value of the process variable being measured or sensed. Correct Answer: ACCURACY Precipitation which has been rendered (made) acidic by airborne pollutants. Correct Answer: ACID RAIN Adsorptive particles or granules of carbon usually obtained by heating carbon (such as wood). These particles or granules have a high capacity to selectively remove certain trace and soluble materials from water Correct Answer: ACTIVATED CARBON A cond...

The most common disinfection by product when adding chlorine to water containing natural inorganic material. Correct Answer: Chloroform What will most probably cause taste and odors, slime, and filter clogging? Correct Answer: Blue-Green Algae Why can rapid sand filters handle higher filtration rates compared to slow sand filters? Correct Answer: Coarser Sand Iron bacteria can interfere with _________because the bacteria produce _________that prevents the stabilization chemicals from...

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 Under the Surface Water Treatment Rule, disinfection residuals m...