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23 Cards in this Set
- Front
- Back
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What's the main use of a fire hydrant
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The main use of a fire hydrant is for flushing, filling water trucks and street sweepers and fire fighting.
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What are your two main types of fire hydrants
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There is dry barrel fire hydrants and wet barrel fire hydrants
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What is a dry barrel fire hydrant
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Dry barrel fire hydrants are usually used in places were freezing may occur and does not have water at the top
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What is the wet barrel fire hydrant
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A wet barrel fire hydrant is always filled and is not suitable for any place where freezing may occur
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What are the install requirements for dry and wet fire hydrants
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Fire hydrant should be near intersection also should be set back from the curb a minimum of 2 feet and should have a breakaway plans flange that is 2 inches above the finish ground surface. Recommended spacing is 350 feet for businesses and 600 feet for residential areas
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Water storage must be a will to provide water times of what
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Anytime there's a power failure pump failure or were large quantities are needed for firefighting
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What types of tanks are there
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Clear well tanks, elevated tanks, standpipes, ground-level tanks, buried tanks and pressurized tanks,
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What is an elevated tank and it's pros and cons
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Looks: like a ball on a stand
Pros: pumping cost, pressure fluctuation, auxiliary power, small amounts of storage. Cons: expensive to build and looks ugly |
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What is the standpipe tank and it's pros and cons
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Looks: like a soda can
Pros: sheet to bill more stories and elevated tank Cons: lower portion unusable unless pumped |
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What is a ground-level tank and it's pros and cons
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Looks: like a cake
Pros: it's cheap to Bill and reduces auxiliary power Cons: needs lots of space and aesthetics |
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What is a buried reservoir and it's pros and cons
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Looks: tank hidden underneath earth
Pros: looks better and can use the space above Cons: expensive to build, can leak, and the tank can float if water falls in there |
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What is a hydropneumatic tank and pros and cons
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Looks: above ground tank with an air compressor on the side
Pros: cheap, allows for surge protection , reduces pumping requirements Cons: you do need external power because of low amount of storage |
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What are important requirements of a tank
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You should have overflow discharge close to the floor with a screen and at least two pipe diameters above the finish floor. Tank should be re coated at least every 20 years
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What kind of monitoring devices should you have a tank
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You should have float target, pressure transducer, and sonic level sensors.
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What is a pressure transducer
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It allows you to convert actual pressure in the tank to something a computer can read
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What is a sonic level sensor
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It allows you to check the flow rate in the tank and converted to something a computer can read
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What kind of water quality monitoring devices should you have anything in a tank
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You should be able to check the temperature, the chlorine residual and nitrification. And tank mixers
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Why are tank mixers important
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They remove stratification of the water
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Why must the interior of a tank be coated and what rating must a coating be
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The interior of a tank needs to be coded to withstand wetting and drying, abrasion from sand and ice, and any chemicals such as chlorine chloramines and ozone. The coding coating should be NSF 61 compliant
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What is cathodic protection
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It's a chemical or electrical protection so that the tank does not corrode. There are two types of cathodic protection: active cathodic protection and passive cathodic protection
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What is active cathodic protection
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Active cathodic protection reverses the current flow of electrons that dissolved iron
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What is passive cathodic protection
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Passive cathodic protection actually has sacrificial anode's, zinc rods, or plates in the water which will react instead of the tank
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Attack should be drained and inspected every how many years. And what should you check for
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Attend should be drain inspected every 3 to 5 years to do the routine maintenance. In concrete tanks check for cracks and corrosion and In steel tanks check for coating failure, corrosion, sand deposits, and overflows.
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