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Water Treatment Practice Certification Exam Questions & Answers (100% HELPFULL)

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A mixture of air and gas is considered hazardous when the mixture exceeds what percentage of the lower explosive limit (LEL)? - - 10% Which of the following duties should NOT be performed by a small system operator? - - Wire pumps, compressors, and electrical components of the water system What are the most important methods of ensuring operator safety? - - Alerting operators of unsafe acts and conducting mandatory safety training What safety procedure should an operator always follow when mixing a solution of sodium hypochlorite (liquid bleach) and fresh water? - - Wear goggles and gloves when handling hypochlorite Which form of hypochlorite is the most dangerous to handle? - - Calcium What are the two most important safety concerns when entering a confined space? - - Oxygen deficiency and hazardous gases What piece of equipment must an operator wear when entering a confined space? - - Harness

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Water Treatment Practice Certification Exam Questions
& Answers (100% HELPFULL)



If a consumer complains about the drinking water characteristics, the operator should record the
complaint and - ✔✔✔ - Investigate immediately.



What term is used when a water utility divides its total operating expenses into the total revenue? -
✔✔✔ - Operating ratio



How often should operating data, such as flow rate, amount of water treated, dosage of chemical, and
reservoir levels be recorded? - ✔✔✔ - Daily



Which of the following is the most important reason to keep daily records of operational data? - ✔✔✔
- Document that safe drinking water has been delivered to customers


Under the requirements of the Safe Drinking Water Act, it is the duty of the water purveyor to deliver
potable water of proper quantity only as far as the - ✔✔✔ - Consumer's tap inside the home.



According to the Safe Drinking Water Act, the basic definition of a public water supply system is any
water system that supplies water for human consumption that serves - ✔✔✔ - 15 service connections
or over 25 persons for over 60 days a year.



What agent is responsible for for reporting lab results to the regulatory agency? - ✔✔✔ - Water
system owner


According to the USEPA drinking water regulations, the owner or operator of a public water system
which fails to comply with applicable monitoring requirements must give notice to the public within
- ✔✔✔ - 3 months of the violation in a daily newspaper in the area served by the system.



What federal law is designed to protect the safety and health of operators? - ✔✔✔ - OSHA

, What federal law regulates public water supplies? - ✔✔✔ - Safe Drinking Water Act



What causes water to move through pores in soil and rocks? - ✔✔✔ - Gravity



What is commonly used indicator of possible health problems found in plants, soil, water and the
intestines of humans and warm-blooded animals? - ✔✔✔ - Coliform bacteria



What are disease producing bacteria called? - ✔✔✔ - Pathogenic



What are the two main causes of hardness in water? - ✔✔✔ - Calcium and Magnesium



Which source of water has the greatest natural protection from bacterial contamination? - ✔✔✔ -
Deep well in gravel



What device measures the flow rate of gases? - ✔✔✔ - Rotameter



How often should preventative maintenance for equipment be performed? - ✔✔✔ - According to the
manufacturer recommendations



Dynamic head is best described as the - ✔✔✔ - total energy that a pump must develop for pumping
to take place.


Which of the following terms refers to the excessive internal pressure, which may be several times
the normal operating pressure and can seriously damage hydro pneumatic tanks, valves, and the
piping network? - ✔✔✔ - Water hammer



Which of the following should an operator investigate first when the well pump and control problems
occur? - ✔✔✔ - Electricity



Most pumps must be primed before startup in order to - ✔✔✔ - start the flow of water.

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