WATER OPERATOR (NEW MEXICO) CERTIFICATION LEVEL 3 STUDY GUIDE QUESTIONS WITH 100% VERIFIED SOLUTIONS

WATER OPERATOR (NEW MEXICO) CERTIFICATION LEVEL 3 STUDY GUIDE QUESTIONS WITH 100% VERIFIED SOLUTIONS If Bacteriological retakes are done this month what is the minimum number of samples that must be turned in next month? - ANSWER -5 samples if a 3-log removal is required for Giardia Lamblia what percentage of organisms can survive and still meet requirements ? - ANSWER -0.1 % which Primary Inorganic Contaminant poses an immediate health risk? - ANSWER -Nitrates Why do Nitrates poses immediate health risk? - ANSWER -Pregnant mothers and infants under 18 months can develop a condition known as Blue Baby Syndrome What is Blue Baby Syndrome? - ANSWER -The Presence of Nitrates in the bloodstream that reduces oxygen uptake that gives the skin a blue tint Why is Turbidity a Primary Contaminant? - ANSWER -It shields harmful bacteria from disinfection processes What is a Nephelometer? - ANSWER -Device used to measure NTU's Turbidity is Measured with? - ANSWER -Turbidimeter or Nephelometer How Long must chemical sampling results be kept? - ANSWER -10 Years How long must Bacteriological sampling results be kept? - ANSWER -5 years What is the definitioin of a indicator organism? - ANSWER -microorganisms whose presence in water indicates probable presence of pathogens (disease-causing organisms). What is Sodium Thiosulphate? - ANSWER -white powder used to Neutralize any chlorine that may kill bacteria Why should you Flush sample line before sampling? - ANSWER -To insure the water being sampled is from the main and not the customers plumbling Which factor is used to determine how many Bac-t samples must be taken? - ANSWER -Number of people served What is the minimim number of Bac-T sample(s) required each month? - ANSWER -1 Anytime the MCL is exceeded and fecal coliform positive results come back from any of the sample(s)? - ANSWER -It is a Non-acute violation If Retakes are required this month what is the minimum number of samples required next month? - ANSWER -5 Which bacteria are found only in surface water supplies? - ANSWER Cryptosporidium & Giardia What must be done on a sample form to identify a Bac-T sample is from a well and is not a compliance sample? - ANSWER -Checking Speacial Sample on the form and identifying the type of sample in the Remarks line How soon must NMED be notified that a Bacterial MCL has been exceeded? - ANSWER -24 hours what is a indicator organism - ANSWER -Coliform group what are the waterborne pathogens found in all water supplies? - ANSWER Typhoid , Cholera , Dysentery , Hepatitis , Paratyphoid (types A & B) what is pathogens - ANSWER -Disease causing Bacteria Water is called the ______ solvent? - ANSWER -Universal What are the two sources of water ? - ANSWER -Ground & Surface What is the word used to identify water that is safe to drink? - ANSWER -Potable Water cycles from the atmosphere to the earth and bcak to the atmosphere. what is this natural water cycle called? - ANSWER -Hydrologic Cycle As part of the normal water cycle water is lost,or givenup, to the atmosphere by trees and by evaporation from the surface of streams,lakes and oceans. This combined loss is called? - ANSWER -Evapotranspiration What is meant by Disinfection? - ANSWER -Destruction of Pathogens What are some of the uses fro chlorine other then Disinfection? - ANSWER Removal of Iron & Manganese some kinds of Taste & Odors, and some dissolved gases, such as Ammonia and Hydrogen Sulfide What are Trihalomethanes? - ANSWER -byprouducts of drinking water chlorination. these byprouducts form when chlorine reacts with dissolved natural organic matter, moslty plant life What health risks do Trihalomethanes (THM) cause? - ANSWER -Causeproblems with liver, kidney,or central nervous systems, and may increase cancer Risk. Also THMs have possible reprouductive health risks What is used to locate Chlorine leaks? - ANSWER -Ammonia Chlorine Gas is ____ time heavier then air? - ANSWER -2.5 times What are Chloramines - ANSWER -Chloramines are disinfectants used to treat drinking water. Chloramines are most commonly formed when ammonia is added to chlorine to treat drinking water. The typical purpose of chloramines is to provide longer-lasting water treatment as the water moves through pipes to consumers. This type of disinfection is known as secondary disinfection. If a single Chlorine Cylinder freezes, What is wrong? - ANSWER -Feed rate is too high Sodium Hypochlorite is found in which type of chlorine? - ANSWER -Bleach Breakpoint chlorination - ANSWER -Results in a free chlorine residual If gas is ventiing from the relief valve on a chlorinator where should you look for the problem? - ANSWER -The Pressure regulating valve