CLASS A WATER OPERATOR LATEST UPDATED 2025/2026 EXAM WITH COMPLETE COMPREHENSIVE QUESTIONS AND SURE VERIFIED SOLUTIONS 100% GRADED AT A+ SCORE!! SURE GUARANTEED PASS!!

CLASS A WATER OPERATOR LATEST UPDATED 2025/2026 EXAM WITH COMPLETE COMPREHENSIVE QUESTIONS AND SURE VERIFIED SOLUTIONS 100% GRADED AT A+ SCORE!! SURE GUARANTEED PASS!! 1. How many Training Hours and experience for a class D Water Operator - ANSWER 16 Hours Training and No Experience 2. How many Training Hours and experience for a class C Water Operator - ANSWER 36 Hours Training and 1 year Experience 3. Sterilization - ANSWER The complete destruction of all organisms present in the water. 4. Calcium Hypochlorite (High Test Hypochlorite (HTH)) - ANSWER Calcium hypochlorite Ca(OCl)2 is a disinfectant that can be purchased in tablet, powder or granulated form. HTH has about 65% available chlorine 5. Sodium hypochlorite (Liquid Bleach) - ANSWER Sodium hypochlorite NaOCl is a disinfectant that comes in liquid form. Common household bleach has a concentration around 5.25%. Most water systems that use bleach will use a 10 to 15% concentration. 6. Hypochlorous acid (HOCl) - ANSWER A weak acid formed from water and chlorine gas (Cl2) that has good disinfectant properties 7. Hydrochloric acid (HCl) - ANSWER A strong acid that is formed from water and chlorine gas (Cl2) that has weak disinfectant properties. 8. Most common source of chlorine gas leaks - ANSWER Reusing gaskets and washers on chlorine cylinders 9. How many Training Hours and experience for a class B Water Operator - ANSWER 100 Hours Training and 3 years Experience (must include 1 year of hands on experience) 10. How many Training Hours and experience for a class A Water Operator - ANSWER 200 Hours Training and 5 years Experience (must include 2 years of hands on experience) 11. How many Training Hours and experience for a Class C Lab Operator - ANSWER 32 Hours and no experience 12. How many Training Hours and experience for a Class B Lab Operator - ANSWER 32 hours of C and 32 hours of B and 6 months experience. ***associate in science can substitute 32hrs of C level training 13. How many Training Hours and experience for a Class A Lab Operator - ANSWER 32 hours of B and 1 year experience. ***Must include a Bachelor in science 14. How many Training Hours and experience for a Class C Distribution Operator - ANSWER 36hours and 1 year experience 15. How many Training Hours and experience for a Distribution Technician - ANSWER 8 hours and no training. 16. Community Water System - ANSWER A public water supply that has at least 15 service connections or serves 25 or more persons on a regular basis 17. Primary Contaminants - ANSWER Contaminants identifies by the EPA as harmful to umal health 18. Maximum Containment Level (MCL) - ANSWER The level in which contaminants must not exceed or public notification is required. 19. Cryptosporidium - ANSWER A microsocpic parasite that can be found in water. It produces cysts that are very resistant to harsh environmental conditions. It is responsible for intestinal illness called cryptosporidiosis. Symptoms include diarrhea, cramps, gas, bodily discomfort, fatigue, and weight loss. Occurs one week after exposure and can last for 1-4 weeks 20. Disinfection Profiling - ANSWER A water system assesses the level of disinfection currently provided and then determines the impact a proposed change in disinfection practice would have. 21. E. coli - ANSWER A bacterium that is commonly used as an indicator of human health risk from harmful micro organisms that can be present in water. Symptoms include sever cramps and diarrhea. Blood is often seen in the stool. Symptoms begin 1-9 days after exposure and last a week or less. 22. Giardia - ANSWER A microscopic parasite that can be found in water. It produces cysts that are resistant to harsh environmental conditions. Giardia causes intestinal illness called giardiasis. Symptoms simular to cryptosporidiosis. Vomition, chills, headache and fever may also occur. Symptoms begin one week after exposure and can last up to a month. 23. Hard Water - ANSWER A characteristic of water caused mainly by the salts of calcium (Ca++) and magnesium (Mg++). Undesirable due to formation of soap curds, increase use of soap, and scale deposits in boilers and water heaters. Defines as having hardness of 100mg/L or greater 24. Maximum Residual Disinfectant Level (MDRLs) - ANSWER The highest level of disinfectant allowed in drinking water. Standards set by the US EPA 25. Microbial Pathogens - ANSWER Micro-organisms that cause disease 26. Safe Drinking Water Act (SDWA) - ANSWER An Act passed by the US Congress in 1974. It establishes a cooperative program among local, state, and federal agencies to ensure safe drinking water for customers. 27. Ch 1 - One gallon of water weighs - ANSWER 8.34 pounds 28. Ch 1- The average domestic water usage per person per day is usually somewhere in the range of - ANSWER 100-130 gallons 29. Ch 1 -Probably the most important source of information to use when implementing changes in process control at a water plant is - ANSWER Lab Results 30. Ch 1 - The most important duty of a water plant operator is to - ANSWER Help to protect the health and well-being of the community 31. Apparent color - ANSWER The color visible in water 32. True color - ANSWER Dissolved material contribution to color and is not removed through simple filtration (i.e. coffee or tea). Measure in Color Units (CUs) using a clear glass tube called a Nessler tub.