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23 Cards in this Set
- Front
- Back
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What are the 3 main points in the British standard on hydrants? |
65mm round thread outlet to enable standpipe to be attached Minimum water flow of 2000 litres per minute minimum pressure of 1.7 bar, with water flowing Anti clockwise opening |
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Where does water in hydrants come from? And how much does it cost? |
Normal mains water supply (just like taps) Originates from reservoirs then goes to treatment plants, pumping stations, trunk mains and service mains. It uses gravity then pumping stations It is free |
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What equipment makes up the hydrant gear? |
Double headed stand pipe Hydrant bar Hydrant key |
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Name parts of the double headed standpipe? |
Pressure release lug Double headed outlet Instantaneous coupling Standpipe shaft Blank cap |
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What is the difference between hard suction and lay flat? |
Hard suction is designed to withstand external atmospheric pressure Lay flat hose is designed to withstand internal atmospheric pressure |
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How do you secure a hose to a ladder? |
Use hose becket, personal line and round turn two half hitches or hose can be carried aloft then tied using a long line Only one long line per ladder and should be left to the side against a string |
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How to haul aloft a hose (carrying it up the ladder)? |
Placed under No1s arm and then over their back and the side on which they will dismount is the opposite side to which the branch will be carried Must be in control at the bottom to then go up |
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What are the two methods of controlling the hose at the bottom of the ladder? |
Person footing the ladder can feed it through with one hand Or Someone can stand behind and feed it through hand over hand about one pace behind the footer |
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How carrying a hose reel up a ladder differs from a normal main jet? |
An overhand knot is done in the hose reel to prevent it slipping off |
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What are all hydrants used today called? |
Screw down hydrants |
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Different types of leak detection devices for hydrants? |
Magnetic and screw on |
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When do hydrants get tested? |
Yearly visually and every 4 years fully Between April and September but can also be October |
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Rules of care and repair for hoses? |
Hose should be ramped when laid across roads Should not be kinked when under pressure Should Not be made up frozen Should be underrun and cleaned before being stowed |
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Hose identification for the areas? Bandit strap? |
Orange- eastern Yellow- southern Green- western Black- training centres |
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What couplings are used for 45-70mm hose? |
Instantaneous couplings |
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Requirements of a good hose? |
Reliable in use Resistant to bursting, leaking, chemical damage or kinking when passing around bends/corners Not stretch 5% in length and 10% in diameter Light and easy to handle and able to be made up wet or dry Durable- resistant to abrasion and easy to repair Smooth surfaced internally to minimise frictional loss Capable of withstanding pressure changes and shock |
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Two different types of female couplings? |
Pressure release instantaneous coupling (1 knob) Two pull release couplings (fitted on hoses) |
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Storz couplings why are they used for? |
90 & 150mm hose and also the 90mm adaptor kit (changes stir couplings to normal instantaneous ones) |
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How to clean a hose? |
Broom and cold water should be enough but can use lukewarm soapy water and if not then send it off to be cleaned |
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What hoses can be used for soft suction? |
70mm and 90mm and 150mm |
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Rosenbauer project 2 what is its working pressure range and lpm? |
Between 3.5-7bar and can throw 57m at 7 bar can produce a solid jet at 630lpm or max flow rate 930lpm with jet/spray combo |
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Specs of delta attack 400/500/ RB101? |
Pistol grip handle Stirrup handle on off Flow rate control ring Spinning teeth Pattern adjustment collar Effective operation for pulse sprays 130,230,300,400 lpm Working pressure 6 bar but will still work effectively down to 3 bar |
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Hose reels specs? |
Yellow 18m long 1 drum on each side of appliance 4 lengths on each side Connected via Mac Donald couplings 22mm internal bore Delta attack 100 is the branch Flow settings- 50 100 150 and 230lpm |
