WATER DISTRIBUTION GRADE 1 CERTIFICATION ADEQ PRACTICE EXAM NEW GUIDE QUESTIONS AND ANSWERS COMPLETE GUIDE MATERIAL What is the general definition of an ion? An _________ with a positive or negative charge - ANS Atom A continuous positive pressure in a distribution system is essential for preventing what event? - ANS Backflow Event _____________ water pressure must be maintained to ensure adequate customer service during peak flow periods. However, minimum positive pressure must be maintained in mains to protect against backflow or backsiphonage from cross -
connections. - ANS Minimum Name the most common CAUSE for publ ic water supply contamination. _________________ or cross -connection - ANS Backflow What does a backsiphonage condition usually cause? __________ pressure or negative pressure on the service or supply side. - ANS Reduced What does a double check valve ba ckflow assembly provide effective protection from? Both backpressure and backsiphonage of ____________. - ANS Pollution What is equipment that utilizes water for cooling, lubrication, washing or as a solvent always susceptible to? - ANS Cross -Connection What is the difference between a reduced pressure principle backflow device and a double check backflow device? The RP has a ______________. - ANS Relief Valve What is the maximum time period between having a backflow device tested by a certified backflow tester? ______________ year. - ANS 1 What is the regulatory definition of a cross -connection in a water supply? A physical connection between a public water system and any source of water or other substance that may lead to contamination of the water pro vided by the _____________ through backflow. - ANS PWS What is the name of a type of valve that reduces the differential pressure across a closed disk making the main valve easier to open and close? - ANS Bypass Valve As soon as Cl2 gas enters the throat area, a victim will sense a sudden stricture in this area-Nature's way of signaling to prevent passage of the gas to the lungs. At this point, the victim must attempt to do two things: get out of the area of the leak, proceeding upwind, and to take only v ery short breaths through the mouth. Normal breathing will cause __________, which must be prevented if possible. - ANS Coughing Chlorine gas causes suffocation, constriction of the chest, tightness in the throat, and edema of the ______________. - ANS Lu ngs _______________ available chlorine is very effective in killing bacteria. - ANS Free How should an operator store an empty chlorine cylinder? ____________, tagged as empty. - ANS Upright If a chlorine leak occurs, where will chlorine gas accumulate? Near the ____________ of the tank. - ANS Bottom What effect does chlorine gas have on the sense of smell? It produces olfactory _______________. - ANS Fatigue What is the primary safety concern when using chlorine gas as opposed to calcium hypochlorite or sodium hypochlorite? The potential for a _____________ leak. - ANS Gas What may occur d ue to chronic exposure to low concentrations of chlorine gas? Chronic exposure may cause corrosion of the _____________. - ANS Teeth What is the process called that changes water vapor to tiny droplets or ice crystals? - ANS Condensation What is the unit of measurement for sound? - ANS Decibels What happens if grease comes in contact with the winding of a motor? - ANS The winding insulation my deteriorate. What is the most common type of valve used in isolating a small or medium sized section of a distr ibution system? - ANS Gate What is a possible result of over greasing a bearing? There is extreme _____________ in the bearing chamber causing heat and scoring of the shaft. - ANS Friction
connections. - ANS Minimum Name the most common CAUSE for publ ic water supply contamination. _________________ or cross -connection - ANS Backflow What does a backsiphonage condition usually cause? __________ pressure or negative pressure on the service or supply side. - ANS Reduced What does a double check valve ba ckflow assembly provide effective protection from? Both backpressure and backsiphonage of ____________. - ANS Pollution What is equipment that utilizes water for cooling, lubrication, washing or as a solvent always susceptible to? - ANS Cross -Connection What is the difference between a reduced pressure principle backflow device and a double check backflow device? The RP has a ______________. - ANS Relief Valve What is the maximum time period between having a backflow device tested by a certified backflow tester? ______________ year. - ANS 1 What is the regulatory definition of a cross -connection in a water supply? A physical connection between a public water system and any source of water or other substance that may lead to contamination of the water pro vided by the _____________ through backflow. - ANS PWS What is the name of a type of valve that reduces the differential pressure across a closed disk making the main valve easier to open and close? - ANS Bypass Valve As soon as Cl2 gas enters the throat area, a victim will sense a sudden stricture in this area-Nature's way of signaling to prevent passage of the gas to the lungs. At this point, the victim must attempt to do two things: get out of the area of the leak, proceeding upwind, and to take only v ery short breaths through the mouth. Normal breathing will cause __________, which must be prevented if possible. - ANS Coughing Chlorine gas causes suffocation, constriction of the chest, tightness in the throat, and edema of the ______________. - ANS Lu ngs _______________ available chlorine is very effective in killing bacteria. - ANS Free How should an operator store an empty chlorine cylinder? ____________, tagged as empty. - ANS Upright If a chlorine leak occurs, where will chlorine gas accumulate? Near the ____________ of the tank. - ANS Bottom What effect does chlorine gas have on the sense of smell? It produces olfactory _______________. - ANS Fatigue What is the primary safety concern when using chlorine gas as opposed to calcium hypochlorite or sodium hypochlorite? The potential for a _____________ leak. - ANS Gas What may occur d ue to chronic exposure to low concentrations of chlorine gas? Chronic exposure may cause corrosion of the _____________. - ANS Teeth What is the process called that changes water vapor to tiny droplets or ice crystals? - ANS Condensation What is the unit of measurement for sound? - ANS Decibels What happens if grease comes in contact with the winding of a motor? - ANS The winding insulation my deteriorate. What is the most common type of valve used in isolating a small or medium sized section of a distr ibution system? - ANS Gate What is a possible result of over greasing a bearing? There is extreme _____________ in the bearing chamber causing heat and scoring of the shaft. - ANS Friction
