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Mensch
c license
| Question | Answer |
|---|---|
| A disease that cannot be contracted by drinking contaminated water is... | Maleria |
| A non-permit confined space by OSHA means a confined space that... | Does not contain or have the potential to contain any hazard capable of causing death |
| When used in connection with the Safe Drinking Water Act, MCL means... | Maximum Contamination Level |
| Examples of a non-community water system include... | Highway rest areas |
| TCEQ requires results be recorded and submitted daily for surface water... | Disinfectant residuals, Turbidity, pH, Alkalinity, Total solids |
| Maintaining an operators training records is the responsibility of ... | the Operator |
| With no SCBA and a chlorine leak, a persons first action should be.. | Keep mouth closed, head high, hold breath and get out |
| Before changing a gas chlorine cylinder in a room, first step should be... | Start exhaust vent fan |
| Operators holding Class C certificates are required to renew their license certificate and must also | Inform TCEQ of any address changes |
| To meet TCEQ water standards, each water treatment plant must have a surface water Operator on duty at all times when the plant is in operation or the plant must be provided with... | Continuous turbidity & disinfection monitors, auto alarm systems, auto shutdown system |
| The major responsibility of a certified waterworks operator is to... | Insure that a safe and adequate supply of drinking water is delivered to the customer's tap |
| A public water system is defined as any water system that provides piped water for human consumption to at least ___ service connections on a year-round basis or | 15 service connections, or 25 individuals daily 60 days a year 15/25/60 |
| Most of the surface water in Texas comes from... | Precipitation that falls within the state - rain |
| The most important factor in preventing accidents is... | The attitude of the employee |
| Organics in surface water will combine with halogens to form... | Trihalomethanes THM's |
| According to the average annual water budget for Texas, the majority of surface water leaves the state by... | Evaporation and transpiration |
| The term "water stabilization" refers to... | pH adjustment |
| Which pH measurement would indicate that water is basic (6.0 6.9 7.0 8.3) | 8.3 |
| The "Safe Drinking Water Act" has set water quality standards for what... | Physical, Chemical, Radiological, Bacteriological |
| When a coagulant reacts with finely divided and suspended material in raw water, what is formed? | Floc is formed |
| The rules and regulations for Public Water Systems require straight flow rectangular sedimentation basins to be designed to provide a detention time of at least... | 6 hours |
| Which of the following statements regarding the sedimentation process is true... | 4 traditional zones of a rectangular sedimentation basin are the inlet zone, settling zone, outlet zone, sludge zone |
| Tastes and odors caused by decaying vegetation can often be removed in the treatment process by the use of... | Activated Carbon |
| What chemical is used for softening water... | Lime (soda ash) |
| The process of coagulation includes... | Chemical reaction, Physical reaction Agglomeration reaction, Neutralization of charged particles |
| If sludge is allowed to remain too long on the bottom of a sedimentation basin, a problem could develop with... | Taste and odor problems, Reduction of detention time in the basin, Re-suspension of solids, creation of Septic conditions |
| Coagulation is affected by... | Turbidity, pH and temperature |
| In raw water reservoirs, the most common effect of aeration is... | Removal of taste and odors |
| Sedimentation is improved by... | Uniform, horizontal, low velocity flow across the basin |
| The most important water quality change in filter effluent is... | Turbidity |
| Soda ash is used in water treatment processes to... | Adjust pH |
| A sand filter will not remove... | Dissolved oxygen |
| The occurrence of mud balls in the beds of filters may be prevented by... | Proper sedimentation |
| The loss-of-head through a sand filter is influenced by... | Sand particle size, filtration rate, water temperature and the concentration of dissolved gasses |
| The term Floc refers to... | The flecks of coagulant containing trapped suspended matter |
| The maximum flow rate through a sand filter should be... | 2 - 4 gpm per square foot |
| Baffles are used to prevent short-circuiting in... | Sedimentation basins |
| Filter under-drains or bottoms serve several important purposes including | Deliver the backwash water uniformly underneath the filter media |
| Jar test are used to determine the... | Correct chemical dosage |
| The Rules and Regulations for Public Water Systems states that minimum pressures in all water systems must not be less than ____ and that normal operating pressure must not be less than ____ psi | Minimum psi 20, Normal operating psi 35 |
| The State Board of Insurance recommended capacity for ground storage… | 4 – 6 hour supply 130 gallons per capita 200 gallons per connection |
| An altitude valve is used to… | Control the water elevation in an elevated storage tank |
| The water levels in the two tanks are the same, but tank X holds 1,000,000 gallons of water and tank Y holds 500,000 gallons. The gauge on tank X will have a reading of… | The same as tank Y |
| The capacity of a centrifugal pump will be decreased by… | Insufficient suction head |
| A standpipe… | Has a diameter less than its height |
| The most effective method of cross connection control is… | A physical air gap |
| If using the “combined available chlorine residual” CACR method of disinfections… | When water temp decreases the CACR must be increased in order to maintain proper chlorine residuals |
| After installation or repair of a water line, it should be treated with… | 50mg/L of chlorine for 24 hours |
| Calcium hypochlorite is… | 60 – 70 % chlorine |
| Chlorine gas… | Is highly toxic and can be fatal, Is corrosive in damp surroundings |
| Ozone (O3) is… | Toxic to humans |
| When a section of water main is replaced, any organic material allowed to remain inside the pipe will… | Increase chlorine demand and decrease chlorine residual |
| When collecting a distribution sample for bacteriological testing. The person collecting the sample should allow the water to run _____ before filling the sample bottle | As long as necessary to permit clearing of the service line |
| The volume of a cylinder | 3.14 X R X R X L |
| A chemical commonly used to raise pH is… | Lime (soda ash) |
| Black stains on plumbing fixtures might be attributed to… | Manganese |
| One kilogram equals ___ grams.. | 1000 |
| The indicator organisms used to determine contamination of drinking water… | Coliform group |
| The packing around the shaft of a centrifugal pump should be what… | Tightened just enough to allow an occasional drop of liquid to escape |
| The chemical symbol for iron is… | Fe |
| One pound of pressure will raise water ___ ft. | 2.31 ft |
| Static head is defined as the___________________________. | Pressure due to depth or elevation of water |
| What is the volume of a settling tank 100 ft long 25 ft wide and 8 ft deep… | 20,000 ft3 |
| What is used to detect chlorine leaks… | 10% solution of ammonia (ammonia hydroxide) |
| The pressure gauge at the base of a tank filled to a depth of 1 ft is ___ psi… | 0.433 psi .433 psi per ft |
| The multiple-tube fermentation test consists of 3 distinct test… | Presumptive, Confirmed, and Completed tests |
| Chlorine gas is more or less dense than air… | More dense than air |
| Polyphosphates may be used to retard corrosion and _______. | Calcium scale |
| Calcium hypochlorite is formulated as a _______. | Powder |
| Chlorine leaks in metal containers tend to become… | Larger |
| Determining the pH of water is one of the most important tests. The results of the pH test indicate the _______ | Hydrogen ion activity |
| Alkalinity is a direct measure of water’s capability to resist changes in ________ | pH (acidity) |
| Leakage from a packing gland should be about… | One drop per second |
| If ammonia vapor is passed near a valve, the presence of a leak would be indicated by ______ | White smoke |
| If a fire hydrant requires a nozzle pressure of 100 psi, what head of water must be used to supply it ? | 231 ft ( 100 psi / .433) or 2.31 head = 1 psi |
| Which type of pipe is most likely to be damaged by corrosion… | Steel |
| Carbon dioxide on water will do what to the pH… | Lowers the pH |
| A pneumatic ejector lifts water from low points to higher levels. The device used to achieve this is… | Air compressor |
| Pressure is commonly measured in... | PSI |
| Mechanical seals are being installed in pumps because… | Packing leaks, mechanical seals don’t |
| Which item must be replaced when connecting a new chlorine cylinder… | Washer (or fiber washer) |
| A major cause of pump and motor shaft coupling wear is______ | Misalignment between pumps and motor flanges |
| Filters in a water treatment process are primarily for removing / reducing… | Turbidity |
| A water treatment plant receives an average flow of 261 gpm. What is the daily flow to the plant? | 0.38 261 gpm X 1440 (minutes a day) = 375,840 gal per day. Move decimal 6X |
| The free chlorine residual in water is the amount of ______. | Uncombined chlorine that remains in the water after the chlorine has been applied and allowed to react |
| The chemical name for muriatic acid is what? | Hydrochloric acid |
| A chlorine residual in water can be determined by using the reagent_____. | DPD- diethyl-p-phenylenediamine |
| The most important use of chlorine in water treatment is what? | Disinfectant |
| What is the approximate volume in gallons occupied by 15,000 ft3 (cubed) of water? | 112,200 gallons |
| The difference between the amount of chlorine added to water and the amount of residual chlorine at the end of a specified contact time is called what? | Chlorine demand |
| Water that requires a large amount of soap to produce an acceptable lather is said to be what? | hard |
| A pump may be damaged if it is started with the discharge valve closed, and the pump is a(n) ______. | Positive displacement pump |
| Prepared water sample bottles used for collecting samples for bacteriological examination contain sodium thiosulfate crystals. It is important not to rinse out the sample bottle because the sodium thiosulfate does what? | Neutralizes any chlorine present in the sample |
| Velocity of flow in water mains is usually expressed in terms of _______. | Feet per second |
| A pH reading of 6.0 in raw water indicates the sample is what? | Acidic |
| The temperature of water in a stream is 10 degrees Celcius. What is the equivalent temperature in Degrees F? | 50 degrees Farenhieght |
| A grab sample represents the quality of the water when? | Only when the sample was taken |
| The pH scale runs from _________ to _______. | 0-14 |
| Five gallons of water weighs _______lbs. | 41.7 lbs |
| What is the approximate weight, in pounds, of 50,000 gallons of water? | 417,000 lbs |
| The flow in 35,000 gallons per day. What is that in MGD? | 0.035 MGD |
| The most important factor affecting the useful life of piping is the ability of that piping to resist what? | Internal and external corrosion |
| A pH value of 7.0 is considered to be what? | Neutral |
| The discharge pressure gauge on a pump reads 15 psi. This is equivalent to ____ft of head. | 35 ft |
| Chlorine is very corrosive when combined with what? | Moisture of any kind |
| What is the surface area of a clarifier 40 ft in diameter? | 1256 ft squared |
| Chloramines are formed by the addition of chlorine and what other chemical? | Ammonia |
| The purpose of a rotometer is to meter the flow of what? | Chlorine gas (or any gas for that matter) |
| A valve that joins a customer's service to the water main is called the _____. | Corporation cock |
| When compared to a 1-million gallon reservoir at the same elevation, how much pressure in the mains will a 100,000 gallon reservoir develop? (assume equal elevation for both) | The same pressure |
| What information must be on a warning tag attached to a switch that has been locked out? | Signature of person who locked out the switch and who is the only person authorized to remove the tag |
| Which of the following types of meters has no moving parts? (propeller; proportional; rotometer; venture) | Venturi |
| The component of a centrifugal pump that is sometimes installed on the end of the suction pipe to hold the priming is known as what? | a foot valve |
| Coagulation and sedimentation alone cannot remove all of the turbidity and suspended matter in raw water. The final step in the removal of suspended matter in water is what? | Filtration |
| What does water weigh in terms of lbs/gallons? | 8.34 lb/gal |
| The chemical symbol for sodium is? | Na |
| The purpose of fluoridation of municipal water supplies is to help prevent what? | Dental decay |
| Chlorine valves are opened and close with what? | Valve wrenches provided with a cylinder of 1-ton container by the manufacturer |
| What does one cubic foot of water weigh? | 62.4 lbs |
| When opening and closing valves in high pressure lines, the valves should be opened and closed how? | slowly |
| A hypochlorinator is used to feed _____ into a water supply. | hypochlorite solution |
| One cubic foot of water contains _____ gallons. | 7.48 gallons |
| One of the purposes of water storage tanks is to ____. | supply water at peak demands |
| Mud, silt, clay and other suspended matter in water that cause it to appear murky are called what? | turbidity |
| If the pressure gauge at the bottom of a 200 ft standpipe reads 68 psi, what is the static head in feet? | 157 ft |
| The volume of a sample should depend on what? | What tests the sample will be used for |
| What does a pump need when the gland follower is pulled all the way down? | a new packing |
| Sodium hypochlorite is a compound that can be purchased in liquid solution and be used for what? | disinfection |
| Gas chlorinators, when operated at high rates, can result in what? | Ice formation on the chlorine cylinder |
| When a single water sample is reported as safe, this may be interpreted to mean what? | that the water supply was safe at the sample point, at the time of the sampling |
| In loading or unloading 150 lb chlorine cylinders, hand trucks should be used that are equipped with what? | a retaining or safety chain |
| What does "gpm" stand for? | gallons per minute |
| The amount of dissolved oxygen that can remain in water depends primarily on what? | water temperature |
| A flow of 1.55 ft squared per second is _____ gpm. | 696 gpm |
| What is the chlorine demand if the residual is 0.6 mg/L and 6.6 mg/L has been applied? | 6.0 mg/L |
| The effective pH range for iron and manganese removal is ____ to ____. | 8-9 |
| How many gallons per minute is a flow of 1.0 MGD? | 695 gmp |
| Disease producing organisms are commonly called what? | pathogens |
| The DPD test method for chlorine residual usually involves using what? | a color comparator |
| If a simple piezometer is inserted into a pipe containing water under a pressure of 50 psi, water would rise in the tube to a height of ___ ft. | 115 ft |
| Vent openings on reservoirs and clearwells should be ______. | screened |
| You are chlorinating a well supply and teh chlorine demand jumps from 0.9 mg/L to 3.0 mg/L. This is indicative of _____. | pollution of some kind |
| / Ammonia mixed with chlorine gas creates a | chloramine |
| / The most difficult part of a water distribution operator's job | furnish a continuous supply |
| / Physical connection between a safe and potentially unsafe water source. | cross connection |
| / A distribution system is a | looped system |
| / Dead end mains should be flushed | every month |
| / Excess nitrate causes a condition called | blue baby syndrome |
| / Water hardness is caused by | calcium and magnesium |
| / Sewer mains should be __ft away from water mains | 9 |
| / Bacti records are kept for ____yrs and chemical records are kept for ___yrs | 5, 10 |
| / Bacti samples have to be returned to the lab within ___hrs of the collection time | 30 |
| / Color in the water supply should be less than _____ units | 15 |
| / Chlorine is ______ times heavier than air | 2.5 |
| / 90% of underground pipe failures are related to improper | backfill and bedding |
| / The spoil bank should be located at least ___ft away from the ditch | 2 |
| / The following minimum residuals is ______mg/L for free chlorine and ____mg/L for total chlorine | .2 .5 |
| / Public opinion of the water utility is _______ at a standstill | never |
| / A bacti sample should be taken every ____ft of pipe | 1000 |
| / The most common collection point for a bacti sample is the water tap _______. | outside the house |
| / A standpipe is considered ground storage unless it exceeds _____ft above the highest ________. | 80, service connection |
| / ________ protection is the electrochemical method for preventing ________ of metal tanks | cathodic, corrosion |
| / The _____ is the only cross connection control method approved by _______. | air gap, tceq |
| / _______ on a pipeline depend on the _____ or coefficient of pipe roughness | friction loss, c factor |
| / __________ occurs whenever there is a ______ in the velocity or direction of water flow | water hammer, sudden change |
| / The ______ water pressure required by the rules and regulations is ____psi under any and all conditions | minimum, 20 |
| / 100, 150, 200 and 250 are approved classes of _____ _____. | working pressure |
| / ______ is used to anchor pipe bends | concrete |
| / A general deposit of mineral particles evenly along the inside of the pipe is ________. | tuberculation |
| / Shoring should be used if a ditch is ___ft or deeper | 5 |
| / A written sample writing plan is required for _______ monitoring | coliform |
| / Ladders should be placed every ___ft in a ditch | 25 |
| / An oxygen deficient atmosphere is defined as one which contains _____ than ______ % oxygen | less than 19.5 % |
| / Characteristics of a Centrifugal Pump: as the head _____ the discharge ________. | increases, decreases |
| / The operator should leave a ________ of slack in flexible tubing | gooseneck |
| / The most common type of water meter is the ____ ____ meter | positive displacement |
| / Safe withdrawal weight from a 150 lb cylinder is ___lbs and 400 lbs from a ____ton cylinder | 40 lbs 400 from 1 ton |
| / The most common valve is the _______. | gate valve |
| / The most commonly used fire hydrants used in distribution systems are the _________. | dry barrel |
| / Hydrants have a _____ point in case the hydrant is struck by a vehicle | breakaway |
| / Controlling valves regulate pressure flow ____ and flow _______. | rates & direction |
| / Electricity is the preferred power source for most distribution systems because of ______, reliability and relatively low _______. | availability & cost |
| / When disinfecting a water line, use ____mg/L of chlorine in the main and let stand for ____hrs | 50 mg/L for 24 hrs |
| / When pressure testing the water main, the test pressure should be ___times as great as the ________ operating pressure | 1.5 X normal |
| / Distribution systems are usually laid out in ____ and/or circular designs | loops |
| / Dead ends in a system are usually located on ____ shaped or ____ designs | tree grid |
| / An operator may refer to Piezometric elevation, static head, or pressure head as ____ height | vertical water column |
| / The main purpose of the water storage facility is to provide ____ amount of water to average or equalize the ______ demands plus provide ______ pressures to fight fires | sufficient, daily, minimum |
| / Electrical demand in a wiring system is determined by the amount of ____ consumed | watts |
| / Baffling inside a storage facility may be needed to prevent "hot spots" and ____ flows | straight through |
| / A mass of concrete placed at bends and valve structures to prevent pipeline movement is commonly called a _____. | thrust block |
| / What is the main difference between surface water and groundwater contamination | groundwater takes longer to recover after contamination |
| / A cross-connection is a connection between an _____ and an _______ water supply | approved, unapproved |
| / According to the CDC, which mechanism or problem has caused more waterborne disease outbreaks in the US than any other reported factor? | leaking backflows |
| / What type of water meter is used when the water flow widely fluctuates | compound |
| / How can mechanical damage to water meters be avoided | place it behind the curb and in a meter box |
| / Name one advantage to using centrifugal pumps | they are easy to repair |
| / _____% of the earth's surface is ocean | 75 |
| / Out of all the water on earth, less than _____% of freshwater is immediately available to humans | 1 |
| / The term associated with water that evaporates from living plants is referred to as _____. | transpiration |
| / _____% of all the water on earth is saltwater | 97 |
| / Bacti sample bottles are prepared with a chemical called _____ before they are sterilized | sodium thiosulfate |
| / Killing disease causing organisms in the water is the primary purpose of ____ in water mains | disinfection |
| / Liquified chlorine gas will expand ____ times its original volume | 460 |
| / Chlorine gas is ____ times heavier than breathing air | 2.5 |
| / Chlorine gas is considered to be ____% pure | 100 |
| / Bleach is approximately _____% pure | 5.25 |
| / HTH dry powder chlorine is set at ____% purity | 65 |
| / A commonly used method to test for chlorine residual in water is called the ____ method | dpd |
| / When chlorine gas is added to water, the pH goes down due to the two _____ that form | acids |
| / Water with a pH of 7.9 is considered to be ______ or _____. | basic, alkaline |
| / A 5' deep pipe trench requires exit ladders every ____ feet and it needs to have approved ____. | 25 ft shoring |
| / When turning a centrifugal pump off, "this" must be done to prevent water hammer | close the discharge valve |
| / When an operator isolates a motor from an operable system for repair, it is vital that he/she follow a _____/_____ procedure | lockout/tagout |
| / Horsepower is defined as _____ft-lbs per minute or 746 watts | 33,000 |
| / The rated flow of a water meter, as stated by the manufacturer, is based upon ______ flow | continuous |
| / What is the minimum setback distance for fire hydrants to avoid large vehicle overhang | 2ft |
| / You must coordinate a plan for shutdown of a water storage facility so that the distribution system will still be able to _____ upon and after the shutdown | meet the customers demands |
| / What are the three main components of a centrifugal pump | impeller, case and shaft |
| / Condensation, evaporation, percolation, and precipitation are all components of the _______ cycle | hydrologic |
| / The State requires that _____ _____ be kept in storage for disinfection of new water lines | calcium hypochlorite |
| / If a major chlorine leak occurs, call the supplier and the _____. | tceq |
| / Powder activated carbon is commonly used to treat ____ and ____ problems in water | taste, odor |
| / The primary goal of coagulation, sedimentation and filtration is to remove ____. | turbidity |
| / The 2 pathogenic protozoans resistant to chlorination are: __________. | giardia and cryptosporidium |
| / The process of separating floc from water by gravity is called ____. | sedimentation |
| / ______ is the last barrier between the public and giardia or cryptosporidium | filtration |
| / All public water systems in Texas are required to use _____ as the final disinfectant | chlorine |
| / Water is stored to meet peak demand and to allow production facilities to operate at _______ rates | uniform |
| / The State recommends a TON (Threshold Odor Number) of less than ____. | 3 |
| / In Texas ___% of water is used for commercial, industrial or agricultural purposes | 75 |
| / In Texas ag water demands accounts for about ___% of the total water used | 57 |
| / The federal regulator of drinking water is the ___. | epa |
| / The primary state regulator of water utilities is the ____. | tceq |
| / To be classified as a pws, the system must have at least __ service connections or serve at least __ individuals at least ___ days out of the year | 15, 25, 60 |
| / Concentrations of fluoride greater than (>) ___mg.L can cause ____ in teeth over time | 2, mottling |
| / Low doses of heavy metals, such as lead and copper, can cause damage to the ______ _____ ______ over time | central nervous system |
| / The action level for lead is ____mg.L, and for copper is ____mg/L | 0.015 1.3 |
| / One by-product of chlorinated water is ____________, a suspected carcinogen when consumed in water over a lifetime | trihalomethane |
| / Chlorine is combined with ______ to form chloramines to prevent the formation of _._._._. in surface water | ammonia thms |
| / Supply systems must maintain a minimum water pressure of ___ psi under normal conditions and at least ___psi during emergencies | 35, 20 |
| / Service tap components usually consist of a tapping saddle, corporation stop, service line tubing, curb stop and a _____. | meter |
| / If a repaired main line must be returned to service quickly, dose it with ____mg/L Chlorine, for ___minutes | 500 mg/L 30 min |
| / The 2 primary categories of pumps are: ____ and _____. | centrifugal, positive displacement |
| / The "Texas Hazard Communications Act" is known as the "____ ___ ____ Act | right to know |
| / _____ all shoring from the top down and _____ from the bottom up | install, remove |
| 0 A physical link between a potable water supply and one of unknown or questionable quality is | a cross connection |
| 0 The purpose of stabilization is . | to prevent corrosion or excessive scale from entering the distribution system |
| 0 Core sampling is a viable way to check the condition of your | filters |
| 0 _____________ ______________ are used to cause particles to become destabilized and begin to clump together | primary coagulants |
| 0 The hydrologic cycle relates to . | movement of water in the environment |
| 0 ____________ has been implicated in more waterborne disease outbreaks than any other factor | improper treatment |
| 0 The filters in the treatment plant are 40 feet by 20 feet by 7 feet deep. The flow is 1500 gpm. What is the filtration rate | 40 x 20 = 800 sq ft 1500 / 800 = 1.875 rate |
| 0 ____________ corrosion is the corrosivity of dissimilar metals | galvanic |
| 0 pH, by definition is | the hydrogen ion concentration in water |
| 0 Generally, the more uniform the media, the _________ the rate of headloss | slower |
| 0 The most common operational complaint received by a water operator is . | taste and odor |
| 0 Combined filter effluent must be less than ______ NTU in 95% of allmeasurements (collected every four hours) for each month | .3 |
| 0 Total Coliform samples have a _______ hold time | 30 hour |
| 0 Extremely soft water can cause problems with pipes and fittings because it is | scale forming |
| 0 The best pH level for coagulation usually falls in the range of . | 7 - 9 |
| 0 Sedimentation basins have _____________ zones | 4 |
| 0 The two main substances that cause water hardness are . | magnesium and calcium |
| 0 When backwashing filters, bed expansion should be between ___________ percent | 30 - 50 % |
| 0 The two main softening methods used by treatment facilities are | ion-exchange and lime-soda ash |
| 0 Which disinfection method provides a residual safeguard | chlorination |
| 0 Filtration actually ____________ particulates | traps / stores |
| _ Velocity X Area = | Flow rate (velocity is Ft per Second) |
| _ 1 Acre is ______ sq ft | 43,560 sq ft |
| _ 1 MGD = ______ GPM | 694.4 gpm = 1 MGD |
| _ Waterborne pathogen live and grow | in the intestines of infected people |
| _ 1 cfs = | 449 gpm = 1 cfs |
| _ Vertical psi = | 1 ft = .433 psi 2.31 ft = 1 psi |
| _ 1 mile is _____ ft | 5280 |
| _Water weighs ______ per gal | 8.34 |
| _ Minutes in a day | 1440 |
| _ 694.4 gpm = | 1 MGD |
| _Cubic ft of water = | 7.48 gal |
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mensch
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