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FL WATER DISTRIBUTION LEVEL 2-3 2025-2026 EXAM| QS AND AS 100% GUARANTEED SUCCESS| A+RATED
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Ch. 62- Drinking water standards, monitoring, and reporting Ch. 62- Permitting, construction, operation, and maintenance of Public Water System Ch. 62- Requirements for Public Water Systems that are out of compliance Ch. 62- Drinking water and domestic wastewater treatment plant operations Ch. 62-
Classification and staffing of water or domestic wastewater treatment plants and water distribution systems MCL for arsenic 0.010 mg/L MCL for lead 0.015 mg/L MCL for Nitrate 10 mg/L MCL for turbidity 5 NTU MCL Fluoride 4 mg/L
MCL for Chlorine residual, total .6 mg/L Head Loss The head, pressure or energy (they are the same) lost by water flowing in a pipe or channel as a result of turbulence caused by the velocity of the flowing water and the roughness of the pipe, channel walls, or restrictions caused by fittings. Water flowing in a pipe loses head, pressure or energy as a result of friction losses. The head loss through a filter is due to friction losses caused by material building up on the surface or in the top part of a filter. C Factor - definition and range Higher the c factor, the smoother the pipe. Ductile and Cast Iron - lowest ~ 100 PVC, PE, PLASTIC-highest ~140 - Distance of water mains to sewer 6 ft minimum and 10 ft preferably - at least 1 ft higher
How often should coliform testing be conducted? Every month - MCL violation if more than 5% of samples are positive What is the chemical found in the specially prepared bottles that are used for coliform testing? Sodium Thiosulphate MCL for copper 1.3 mg/L Order of backflow devices in terms of effectiveness: Air gap, Reverse pressure, double check valve assemblies, dual check valves, vacuum breakers What is the normal pressure range in PSI and what is the minimum pressure range in PSI? Normal operating pressure range is 35 to 100 PSI. The minimum working pressure that the main should not drop below is 20 PSI
What federal law regulates public water systems? Safe drinking water act What are the two constituents that should be regularly sampled and tested from the distribution system? Coliform bacteria in chlorine residual What is the most common cause of black stains on plumbing fixtures? Manganese What is the name of the depressed water surface surrounding the well when the well is in operation? Cone of depression What is the name of the height at which the water will rise in wells located in an artesian aquifer? Piezometric surface
What type of corrosion is caused by the use of dissimilar metals within a water system? Galvanic corrosion What are two critical points that ensure centrifugal pumps will continue to operate reliably? Proper installation and alignment What is the recommended water velocity through pipes at maximum flows? 2 to 4 FPS Fire demand can account for what percent of flow in the design of a water system? 50% Who ensures that the distribution system components from various manufacturers are compatible?
To equalize the pressure on both sides of the valve. This will allow for easier operation How often does the AWAA recommend that the distribution valves be exercised? Once a year For best results what is the preferred water velocity when flushing a water main? 5 fps How long should the utility maintain bacteriological records for the EPA to review? 5 years How often should fire hydrants be inspected and tested? Twice a year
What chemical is commonly used to inhibit corrosion in the distribution pipes and fittings? Phosphate What is a coupon test installation in a distribution system used for? Determine the rate of scaling or corrosion on the pipe What is the only cross connection/ back flow device that can be installed underground? Dual check valve What time of year should THM samples be taken? Summer What percent of purity is calcium hypochlorite (HTH)? 65%
In order to comply with safety regulations, all couplings on pumps must be: Guarded According to the Florida administrative code, if a routine distribution system coliform sample is positive, how many samples must be collected in a set of repeat samples? Three samples When filling a new pipeline for the first time, the fill rate should not be greater than how many feet per second? 1fps By Florida drinking water rules, storage tanks with excess ports must be inspected every: 5 years by a registered professional engineer
What is the most common issue when an altitude valve functions erratically? The small snubber lines have become blocked and need cleaning A partially closed valve in a water distribution system might cause: Cavitation What is the acceptable amount of unaccounted for water in a distribution system? 10% Which form of chlorine has the shortest shelf life? Liquid What is the metallic compound used to prevent corrosion? Zinc
What is the minimum feet per second that a water main should be flushed? 2.5 FPS What are the three methods of disinfecting a water main? Slug, continuous, tablet Where is the best place to take a coliform sample? Locations that are directly tapped off the main How long should records of action to correct a violation be kept for? 3 years How long should copies of written reports, cross connection control programs, and sanitary surveys be kept for? 10 years
How far should a water main be from storm sewers or reclaim water mains? 3 ft minimum - preferably 6 feet T or F: one of the most important factors in determining the useful life of service lines is the ability to resist internal and external corrosion. True What is added to lower the pH of a high pH water? Sulfuric acid or carbon dioxide What is added to raise the pH in water with a low ph? Lime, soda ash, sodium bicarbonate, caustic soda What is the slope in terms of run to rise for type c soil ( granular and sand )? 1.5 : 1
What is the most common valve used on the discharge side of pumps in order to prevent backflow? Check valve What are the primary purposes for an altitude valve? They control the water level and prevent the tank from overflowing (uses a pilot valve to control) What is the minimum setback for a well in relation to a sanitary sewer or residential septic tank? 100 ft What are the smaller tanks that are supplied and controlled by pressure sensors? Hydropneumatic tanks When is the best time of the year to take a storage tank facility out of service for complete cleaning and inspection?
During the period of the lowest water consumption What is the cutoff range for the maximum amount of oxygen allowed in a confined space, in order to enter? 23.5% What is the term when pipe is laid out for installation? Stringing Name the types of displacement meters: Nuating-disc , piston Name the types of velocity meters: Multi-jet, propeller, turbine, Venturi, orifice plate, insertion meters, electronic meters What are the common pumping problems?
