Water Distribution 1 certification state exam questions and answers Graded-A

Water Distribution 1 certification state exam questions and answers Graded-A Potable water may be defined as: a. Any water that occasionally may be polluted from another source b. Any water that, according to recognized standards, is safe for consumption c. Water high in organic content d. Water that has been transported from outside the service area - CORRECT ANSWER-b). Any water that according to recognized standard is safe for human consumption. To prevent the entry of surface contamination into a well is the purpose of: a. The well casing b. The louvers or slots c. Well development d. The sanitary seal - CORRECT ANSWER-d) The Sanitary Seal Pure water will exhibit a pH value of? a. 0.0 b. 7.0 c. 10.5 d. 14.0 - CORRECT ANSWER-b) 7.0 A pH reading of 6.0 units indicates that the water sample is: a. Very acidic b. Slightly alkaline c. Very alkaline d. Slightly acidic - CORRECT ANSWER-d) Slightly Acidic In drinking water quality, "TDS" is the abbreviation for? a)Total digestable substances b) Total dissolved solids c) Time-delayed sicknesses d) Terminal diseases started - CORRECT ANSWER-b) Total Dissolved Solids In drinking water regulations, the abbreviation "MCL" stands for? a) Maximum contaminant level b) Multiple constituent levels c) Most common level d) Minimum considered legal - CORRECT ANSWER-a) Maximum contaminant level The MBAS method is used to determine levels of which of the following drinking water constituents? - CORRECT ANSWER-Forming Agent In water quality, the symbol "mg/L" is equivalent to: a. Micrograms per liter b. Parts per million c. Parts per billion d. Mostly good levels - CORRECT ANSWER-b) Parts per million The term "clearwell" refers to a? - CORRECT 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? - CORRECT ANSWER-Altitude Valve The primary cause of water quality deterioration in distribution system is? - CORRECT ANSWER-Water age The term "Springline" applies to? - CORRECT ANSWER-The midline of a pipeline When possible, a water main should be tapped while still pressurized to? - CORRECT ANSWER-Minimize contamination risk A connection made into a water main that is full of under pressure is called a? a. Cross connection b. Valve box c. Wet tap d. Spinal tap - CORRECT ANSWER-c) Wet tap A special valve that is used almost exclusively to facilitate making connections to pipeline is the? a. Gate valve b. Corporation stop c. Altitude valve d. Auxiliary valve - CORRECT ANSWER-b) Corporation Stop Which of the following gases will deaden the sense of