Water Distribution Practice Exam Grade 1 study guide Q&A, Exams of Water Resources Planning and Management

Download Water Distribution Practice Exam Grade 1 study guide Q&A and more Exams Water Resources Planning and Management in PDF only on Docsity! Water Distribution Practice Exam Grade 1 study guide Q&A What is the definition of "operator"? - CORRECT ANSWER-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? - CORRECT ANSWER-10 days At which type of facility is a remote operator allowed to operate? - CORRECT ANSWER-Any Grade 1 or Grade 2 facility How close must the remote operator of a facility be to the facility to legally operate the facility? - CORRECT ANSWER-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? - CORRECT ANSWER-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? - CORRECT ANSWER-90 days What is an initial monitoring year? - CORRECT ANSWER-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? - CORRECT ANSWER-0.0005 mg/L Who is allowed to conduct a sanitary survey? - CORRECT ANSWER-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? - CORRECT ANSWER-If the analytical results are < 5 mg/L for 4 consecutive quarters then reduce sampling frequency from quarterly to annually. Which type of system is not required to sample for VOC's? - CORRECT ANSWER- Transient Non-community Water System. What contaminants does the monitoring assistance program monitor? - CORRECT ANSWER-IOCs, VOCs, and SOCs. What types of public water system must comply with Article 6, Capacity Development Requirements for a New Public Water System? - CORRECT ANSWER-Community water systems and non-transient 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 for review and approval by the Department. What three elements make up the elementary business plan? - CORRECT ANSWER-Technical Capacity, Managerial Capacity, and Financial Capacity. What is the definition of an "on-site representative"? - CORRECT ANSWER-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. 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? - CORRECT ANSWER-1 inch or twice the diameter of the supply pipe, whichever is greater. 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? - CORRECT ANSWER- Trihalomethanes According to Arizona State Rule, what term best represents a mechanical device used to prevent back-flow? - CORRECT ANSWER-Back-flow-prevention assembly This type of valve has a movable disk the same size as the full diameter of the pipe. The disc rotates on a spindle or shaft in only one direction to either block or allow the flow of water. - CORRECT ANSWER-Butterfly The four most common categories of valves encountered in the water distribution system are the? - CORRECT ANSWER-Slide, rotary, globe, and diaphragm valves. This type of valve has a flexible piece inside the valve's body and can be adjusted up or down using an attached stem. When the piece is depressed, the flow of water can be stopped or regulated. - CORRECT ANSWER-Diaphragm _______________ may be located below the ground surface and are often made of concrete. They must be protected from contamination and unauthorized entry. - CORRECT ANSWER-Clear Wells What is the recommended procedure for shutting down a large centrifugal pump? - CORRECT ANSWER-Slowly close the discharge immediately before the power is shut off. If the shaft sleeve has been worn, the operator can say that the _______________ has caused the sleeve to score or fret. - CORRECT ANSWER-Packing Water at a desirable temperature that is free from objectionable tastes, colors and turbidity is known as? - CORRECT ANSWER-Palpable The best definition of an ion is? - CORRECT ANSWER-An electrically charged atom When pumping water from a tank, a vortex may be formed. What is a vortex? - CORRECT ANSWER-Revolving water that forms a whirlpool The metabolism and growth of microorganisms in water supplies are affected most by? - CORRECT ANSWER-Temperature Employers must provide operators with a copy of the _______________ upon request and also train operators to work safely with the hazardous substances that are encountered in the workplace. - CORRECT ANSWER-MSDS Which of the following terms best describes the following definition: An effective _______________ program means less time spent on corrective maintenance, resulting in better planning and increased productivity. The reliability of equipment can also be substantially improved. - CORRECT ANSWER-Preventive Maintenance _______________ pressures must be maintained to ensure adequate customer service during peak flow periods or while water is being used to fight a fire. The _______________ positive pressure must be maintained in mains to protect against back-flow or back-siphonage from cross-connections. - CORRECT ANSWER-Minimum, Minimum An actual cross-connection is one for which the connection exists at all times, Examples would be solid piping to an auxiliary supply or into a boiler. An auxiliary supply could be a ________________ source used for emergencies or for reducing the costs of cooling or washing. - CORRECT ANSWER-Nonpotatable Which of the following is NOT used as a water additive for corrosion control in storage tanks? - CORRECT ANSWER-Aluminum Sulfate (Alum) If water distribution valves are opened rapidly, the water can cause pressure changes that travel back and forth through the pipe or system. This condition is know as? - CORRECT ANSWER-Water Hammer Steel and iron pipes are sometimes galvanized. What is the galvanized coating made out of? - CORRECT ANSWER-Zinc According to State Rule, "A.R.S." means? - CORRECT ANSWER-Arizona Revised Statutes Construction changes made to a distribution system should be permanently recorded in which of the following? - CORRECT ANSWER-Recorded on As-Built Plans Operators working with hydrochloric acid should be equipped with the following protective equipment? - CORRECT ANSWER-Rubber apron, boots, face shield, rubber gloves A corporation (Corp) stop is used to? - CORRECT ANSWER-Regulate service lines Chlorine with organic material will create a carcinogenic compound known as? - CORRECT ANSWER-Trihalomethanes What does the term "Back-siphonage" refer to? - CORRECT ANSWER-A development of negative atmospheric pressure in the piping system The _______________ backflow assembly consists of two internally loaded independently acting check valves. During a backflow condition, both checks will shut and prevent backflow, there is not a relief valve on this device. - CORRECT ANSWER- DC or Double Check Chlorine effectiveness depends upon? - CORRECT ANSWER-The pH of water The most convenient way of finding or locating water lines and appurtenances is to ? - CORRECT ANSWER-Maintain good records A valve characterized by a movable disk rotating on a spindle would most likely be a? - CORRECT ANSWER-Butterfly Valve A profile map will show the water operator? - CORRECT ANSWER-A cross-sectional view of the system What type of distribution system has many dead-end lines and is not recommended for use in a highly populated area? - CORRECT ANSWER-Tree System Chlorine residual should be determined by? - CORRECT ANSWER-Using the DPD procedure Which of the following precautions should be taken when working with corrosive chemicals - CORRECT ANSWER-PPE should be used What is the best way for drivers of Class A and B utility vehicles to routinely practice safe vehicle operation? - CORRECT ANSWER-Frequently inspect the vehicles hat is the result when chlorine is added to water that is low in dissolved oxygen and has hydrogen sulfide? - CORRECT ANSWER-You will create elemental sulfur Water meters can under and over register the actual water flow used by the customer. What is a major cause of inaccurate water meter readings? - CORRECT ANSWER- Large amounts of water turbulence According to the Sacramento manual, all storage facilities should be regularly sampled to determine the quality of water which enters and leaves the facility. From sampling information you should clean your storage facilities if? - CORRECT ANSWER-NTUs are increasing The work order form is used by utilities to perform preventive or corrective maintenance in the system. After the work is completed, the work order form is used for? - CORRECT ANSWER-Revision of existing maps and records Written records should be kept on all facilities in the distribution system. These records should describe the facility, its construction, date installed, repair and maintenance work done, manufacturer, and condition during the last inspection. In order to ensure adequate record keeping during valve and hydrant inspections, the operator should complete an inspection report for each? - CORRECT ANSWER-Valve and fire hydrant When tapping a main line for a connection, the shell cutter cuts a round coupon from the existing main and retains it on the cutter. Why should the operator tag the coupon with the date and location of the tap? - CORRECT ANSWER-These coupons record the condition of the water main What will cause the water quality complaint of "milky water"? - CORRECT ANSWER- Entrained air The word "Stationing" on a plan drawing refers to ? - CORRECT ANSWER- Representation of a location from a starting point or reference How would you categorize or classify a nutating-disk water meter? - CORRECT ANSWER-A displacement type meter Before excavation, determine the location of all buried water, sewer, gas, power, telephone and cable TV lines and storm drains in the work area. Many phone books list an ________________ which will assist in the location of these utilities. - CORRECT ANSWER-"Underground Service Alert" or "One-Call" centers The easiest way to ensure that the locations of pipes and appurtenances will be known is to? - CORRECT ANSWER-Maintain good records