Distribution Exam(2024 Latest Update)Accurate 100%

Potable water may be defined as? - ANSWER Any water that according to recognized standard is safe for human consumption. Preventing surface contamination from entering a drinking water well is purpose of the? - ANSWER Sanitary Seal Pure water will exhibit a pH value of? - ANSWER 7.0 A pH reading of 6.0 units indicate that the water is? - ANSWER Slightly Acidic In drinking water quality, "TDS" is the abbreviation for? - ANSWER Total Dissolved Solids The MBAS method is used to determine levels of which of the following drinking water constituents? - ANSWER Forming Agent In water quality, "mg/L" means? - ANSWER Part per million The term "clearwell" refers to a? - ANSWER Reservoir at the outlet of a water treatment plant. A mechanical device often employed to prevent the over-filling and/ on over-draining of distribution system reservoir is the? - ANSWER Altitude Valve The primary cause of water quality deterioration in distribution system is? - ANSWER Water age The term "Springline" applies to? - ANSWER The midline of a pipeline When possible, a water main should be tapped while still pressurized to? - ANSWER Minimize contamination risk A connection made into a water main that is full of under pressure is called? - ANSWER a wet tap A special valve that is used almost exclusively to facilitate making connections to pipeline is the? - ANSWER Corporation Stop The most commonly used meter on small domestic services? - ANSWER Nutating Disk Meter Of the following, which is a positive displacement flow rate meter? - ANSWER Nutating Disk A Nutating disk is found in certain? - ANSWER Water meter A pump is experiencing back-spin after it is shut down. What is the most likely cause? - ANSWER Malfunction check valve When fully open, which of the following valve types will have the highest friction loss? - ANSWER Glove valve The main purpose of a butterfly valve in a water distribution system is for? - ANSWER Isolation The most likely means of connecting two pressure zone is through a? - ANSWER Pressure reducing valve The purpose of an air relief valve is to? - ANSWER Protect the pipe system Which of the following devices is routinely used to reduce system pressure? - ANSWER Globe valve A venture is a device that is used to? - ANSWER Measured water flow The most common valve in water distribution system is the? - ANSWER Gate valve Venturi meters operate under the principle of? - ANSWER Pressure differential An auxiliary valve is always located adjacent to a? - ANSWER Fire Hydrants If you encounter a liquid chlorine leak in a one-ton container. What action should you take first, to reduce the seve