Water Distribution Grade 1 Certification ADEQ Practice Exam Already Passed

Water Distribution Grade 1 Certification ADEQ Practice Exam Already Passed What is the general definition of an ion? An _________ with a positive or negative charge Atom A continuous positive pressure in a distribution system is essential for preventing what event? 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. Minimum Name the most common CAUSE for public water supply contamination. _________________ or cross-connection Backflow What does a backsiphonage condition usually cause? __________ pressure or negative pressure on the service or supply side. Reduced What does a double check valve backflow assembly provide effective protection from? Both backpressure and backsiphonage of ____________. Pollution What is equipment that utilizes water for cooling, lubrication, washing or as a solvent always susceptible to? Cross-Connection What is the difference between a reduced pressure principle backflow device and a double check backflow device? The RP has a ______________. Relief Valve What is the maximum time period between having a backflow device tested by a certified backflow tester? ______________ year. 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 provided by the _____________ through backflow. 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? 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 very short breaths through the mouth. Normal breathing will cause __________, which must be prevented if possible. Coughing Chlorine gas causes suffocation, constriction of the chest, tightness in the throat, and edema of the ______________. Lungs _______________ available chlorine is very effective in killing bacteria. Free How should an operator store an empty chlorine cylinder? ____________, tagged as empty. Upright If a chlorine leak occurs, where will chlorine gas accumulate? Near the ____________ of the tank. Bottom What effect does chlorine gas have on the sense of smell? It produces olfactory _______________. Fatigue What is the primary safety concern when using chlorine gas as opposed to calcium hypochlorite or sodium hypochlorite? The potential for a _____________ leak. Gas What may occur due to chronic exposure to low concentrations of chlorine gas? Chronic exposure may cause corrosion of the _____________. Teeth What is the process called that changes water vapor to tiny droplets or ice crystals? Condensation What is the unit of measurement for sound? Decibels What happens if grease comes in contact with the winding of a motor? The winding insulation my deteriorate. What is the most common type of valve used in isolating a small or medium sized section of a distribution system? 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. Friction What is meant by the term "peak demand?" The _____________ momentary load placed on a water treatment plant, pumping station or distribution system. Maximum What is the range of the pH scale? between _____________-14. Zero What does a Bellows-type sensor reacts to a change in? _________________. Pressure Centrifugal pumps do not generate suction unless the impeller is submerged in water. If a pump is located above the level of water what must be provided on the suction piping to hold the prime? Foot Valve What causes pump cavitation? A suction line may be ____________ or the pump is above the waterline. You have overpumped the well. Clogged What does continuous leakage from a mechanical seal on a pump indicate? The mechanical seal needs to be ___________________. Replaced What is a possible cause of a scored shaft sleeve? The _____________ has broken down Packing What is one disadvantage of a centrifugal pump? It is not______________. Self-Priming What is the best seal to use for a pump operating under high suction head conditions? A _____________ seal. Mechanical What is the common method used to secure an impeller to the shaft on double-suction pump? A _____________ and a tight fit. Key What is the main purpose of the wear rings in a centrifugal double suction pump? The wear rings maintain a flow _______________ between the impeller discharge and suction areas. Restriction What is the purpose of the foot valve on a pump? It keeps the pump _____________. Primed At which type of facility is a remote operator allowed to operate? Any Grade 1 or Grade 2 __________________. Facility At which type of facility is an on-site operator mandatory? All grade _____ and grade _________ facilities. 3 & 4 How close must a certified operator of a facility live to a facility to legally operate the facility as a remote operator? Within 200 miles by ________ travel. Ground Systems with what types of source water are required by law to treat using filtration and disinfection? _________________ under the direct influence of surface water and surface water sources. Groundwater The quality of water in a storage facility could degrade due to excessive water age caused by low demand and short-circuiting within the distribution storage reservoir. Which of the following is not a reason for water quality degradation? The water quality ______________ program is not in compliance. Sampling What is the definition of an "on-site operation?" An operator who visits a facility at least _____________ to ensure that it is operating properly. Daily What is the definition of an "on-site representative?" On-site representative means a person located at a facility who monitors the daily operation at the facility and maintains contact with the ____________ operator regarding the facility. Remote What is the frequency that a remote operator must inspect a grade 1 or grade 2 water treatment plant or distributes groundwater? As often as necessary but no less then ________________. Monthly What is the objective of vulnerability assessment? To determine ____________ in the distribution or water system. Weakness How far from the edge of a hole must you place the spoil from an excavation? 2 feet Before beginning an excavation, who should be contacted to assist in determining the location of all underground utilities in the work are? An "underground Service Alert" center, "One Call Center" or ____________________, all three of these are the same. Bluestake This type of chemical classification may weaken, burn, or destroy a person's skin or eyes and can be either acidic or ___________________. Basic, Alkaline or corrosive How should a supervisor warn an operator about the presence of a confined space? By clearly posting the appropriate ______________ at all entries to a confined space. Signage List the correct order for placing shoring equipment in a trench. Starting at the top move to the bottom of the trench and ______________ to remove it. Reverse How frequently should ladders and climbing devices be inspected by a qualified individual? Once a year What is the name of a map that provides detailed drawings of the distribution system's zones? Sectional Maps What maintains contact between the two surfaces of a mechanical seal? Spring Pressure What does the work "stationing" on a plan drawing refer to? It is a representation of a location from a starting point or reference. Stationing Generally, how long will a water storage tank's interior coating (paint) protect the interior? _________________ years. 3-5 years. What is the name of the valve that is specifically designed for connecting a new water main to an existing main that is under pressure? Tapping Valve Define the term "Water Hammer." A _________________ in a pipeline resulting from the rapid increase or decrease in water flow. Pressure Surge Water hammer exerts tremendous force on a system and can be highly ___________________. Destructive How should a water meter that is removed from service for repair be handled? ________________ the meter to retain water. Seal Name the three main classifications of water meters. Compound, Displacement, and __________________. Velocity Peak day demand is the greatest amount of water used for any one _______________ in a calendar year. Day What negative effect does a water meter have on a service? ____________ loss may occur. Head Name the 4 broad categories of water quality. Physical, ___________________, biological, radiological. Chemical What are disease causing organisms such as bacteria and viruses called? Pathogens What does a positive bacteriological sample indicate? The _______________ of bacteriological contamination Presence What is the name of the area from which surface runoff is carried away by a single drainage system? Watershed What is an advantage of a "wet tap" vs. a "dry tap?" You do not need to ________________ the water line down. Down or turn off What is the most likely type of symptom one could expect upon exposure to a very small percentage of chlorine in the air? A _________________ sensation in the eyes and throat. Burning What must an operator ensure when installing a pressure vacuum breaker backflow device? It must be at least ___________ inches about the highest downstream outlet. 12 inches What is the definition of "operator"? Operator has the same meaning as certified operator. Within how many days must a certified operator notify the Department (in writing) that the operator either ceases or commences operation of another facility? 10 days At which type of facility is a remote operator allowed to operate? Any Grade 1 or Grade 2 facility How close must the remote operator of a facility be to the facility to legally operate it? Within 200 miles by ground travel What is the inspection frequency that a remote operator must inspect a grade 1 or grade 2 water treatment plant or distribution system that produces groundwater? As often as necessary, but no less than monthly Upon expiration of an operator certificate, how many days does an operator have to reinstate the certificate without retaking an examination? 90 days What is an initial monitoring year? The calendar year designated by the Department within a compliance period in which a public water system conducts initial monitoring at a point of entry. What is the reporting limit for all regulated VOC's? 0.0005 mg/L Who is allowed to conduct a sanitary survey? A representative of the Department or a professional engineer or sanitarian who is registered in Arizona and approved by the Department. Under what circumstances may the Department reduce monitoring frequency for nitrate at a surface water sampling point and what is the reduced frequency? If the analytical results are 5mg/L for 4 consecutive quarters then reduce sampling frequency from quarterly to annually. Which type of PWS is not required to sample for VOC's? Transient Noncommunity Water System What contaminants does the monitoring assistance program monitor? IOCs, VOCs, and SOCs What types of public water systems must comply with Article 6, Capacity Development Requirements for a New Public Water System? Community water systems and nontransient non community water systems that begin operations on or after October 1, 1999. To become a new public water system, an owner shall file an elementary business plan review and approval by the Department. What three elements make up the elementary business plan? Technical Capacity, Managerial Capacity, and Financial Capacity. What is the definition of an "on-site representative"? On-site representative means a person located at a facility who monitors the daily operation at the facility and maintains contact with the remote operator regarding the facility. What is the definition of an "on-site operation?" An operator who visits a facility at least _____________ to ensure that it is operating properly. Daily According to Arizona State Rule, this term means 1 of the family of organic compounds, named as derivatives of methane, wherein 3 of 4 hydrogen atoms in methane are substituted by a halogen atom in the molecular structure. Trihalomethanes According to Arizona State Rule, an "air-gap separation" means a physical separation between the discharge end of a supply pipe and the top rim of its receiving vessel, which has a separation distance equal to at least? 1 inch or twice the diameter of the supply pipe, whichever is greater. Which two agencies are responsible for approving laboratory analytical methods for drinking water analysis? The U.S. Environmental protection Agency and the Arizona Department of Health Services. Name a statement that is true about a double check valve backflow assembly? A double check valve is not designed to stop backsiphonage of a health hazard Name a statement that best describes the operation of a reduced pressure principal backflow assembly? The relief valve will open and drain if a pressure differential occurs between the two checks. Which disease is NOT transmitted by water? AIDS Which of the distribution valves is NOT classified as a rotary valve? A gate valve is a linear type valve. Which types of motors would be expected to have the lowest demand for a starting current? A wound-rotor induction motor Which treatment techniques are NOT included in ADEQ grading a water facility? Activated Charcoal This statement is NOT correct about a pressure tap? The fire protection must be taken out of service Explain the procedures concerning a confined space safety procedure? The concentration of oxygen should range between 19.5 percent to 23.5 percent before entering. A self-contained breathing apparatus may be necessary. Radio contact with a supervisor does not need to be continuous. All persons entering the tank must have a safety harness. What statement is correct about a single phase motor? If it is a repulsion-induction type, it is more simple and less expensive. If it is a capacitor-start type it will have a high starting torque and a high starting current. If it is a single-phase synchronous type, it will have the same number of rotor and stator pulls. Explain statements concerning confined space entry? May be required. To ventilate the confined space. Operators are not required to wear SCBAs unless there is an atmospheric condition that requires SCBA. Atmospheric monitoring must be performed. Other hazards may be present, for example hazardous energy, or engulfment. A permit required confined space will require signage and three persons present to enter the space. What best describes a double suction pump? In a double suction pump water enters the impeller from two sides. Which pump is one of the most frequently used as a booster pump in a water distribution system? A vertical turbine pump. Name a statement that an operator should perform before doing work on any piece of electrical equipment? Lock out and tag the equipment. Which items may be used in a pump stuffing box to prevent air from entering without causing excessive heat and wear on the shaft sleeve? Lantern rings. Identify different types of three-phase motor. A squirrel-cage motor, synchronous motor, and a wound-rotor induction motor. Identify different types of pressure sensing devices. A helical sensor, bourdon tube and bellows sensor This device has the greatest potential to cause contamination if a cross connection occurs. A pesticide mixing tank. Which device is used to prevent backflow on a service connection? A reduced pressure principle backflow assembly (RP) Which chemical is used to de-chlorinate a water sample that is analyzed for bacteria? Sodium thiosulfate Which chemical reaction equation represents the dissociation of hypochlorite acid? Cl2 + H2O - H+ + CL- + HOCL When shutting a large valve, what will help to reduce high pressure? A bypass valve What type of valve is used where the valve is not buried and an operator will need to know from an inspection whether the valve is open or closed? OS & Y Outside Screw and Yoke valve. What type of gauge is used most widely in modern instrumentation? A digital gauge.