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14 Cards in this Set
- Front
- Back
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What are the requirements of a good hose |
Reliable in use Resistant to bursting Shouldn't stretch Light and easy to use Durable Smooth surfaced |
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The hose can stretch by way % |
5% max in length 10% max diameter |
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How much does the 45mm, 70mm & 90mm hose weigh, how long & max working pressure |
45mm = 9kg 23m 15 bar 70mm = 15kg 23m 15 bar 90mm = 23.5kg 30m 15 bar |
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How many of each hose are kept on the pump and reserve? |
10x 70mm 4x 45mm 50% reserve |
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What are the two types of couplings? |
Two pull release Single twist release |
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Whats the care of hoses |
Ramped when laid across a road Not linked when under pressure Not be made up when frozen Under grun and cleaned before stowage |
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What's the information about hosereels |
18.3m long x4 length on one reel Two reels per appliance 22mm in diameter |
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What is the optimum pressure of the delta attack and flow rates? |
Working pressure of 6 bar but can work on 3 bars Flow rate: 130, 230,300 or 400lpm |
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What are the functions of the rosenbaurer Project 2 |
Largest branch Combination of solid jet & spray simultaneously Effective working pressure between 3.5 - 7 bar pressure Throw of 57m Solid jet of 630lpm max 930lpm |
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Whats the flow rate of akron mercury |
950 1400 & 1900lpm The deluge nozzle has a flow rate of 1750lpm Foam nozzle flow rate is 950lpm |
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When is it used |
Water needs to be thrown a great distance Long periods if time Large volumes of water |
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Describe jet reaction |
For every action there is an opposite and equal reaction |
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When is the collecting breech used? |
Used to divide one supply into two separate supplies - High volumes of water |
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When is the collecting breech used |
Used where two low pressure supplies or deliveries are combined to give one good supply |
