need help with questions

[scotthall]

Hey yo, i'm new to the board & would like to ask some questions:-

1 - 3 methods of limiting water damage at a premises during firefighting?

2 - what categories do lift rescues fall into?

3 - how far apart are hydrants spaced?

4 - when using foam attack on liquid, why would the higher % be used at the mainline variable inductor?

thanks in advance for any help

[kurnal]

1- use sprays not jets, use shut off branches, divert/ channel water safely away by sheeting and dollies
2- Emergency Special Services
3- Depends on the risk- industrial or residential
4- % depends on many things- type of concentrate, if you need a stiffer less wet foam, feeding multiple branchpipes, to overcome reduced efficiency through backpressure  due to pumping against head.

Whats the test- probationary firefighter? Good luck- but the understanding is more important than knowing the right answer.

[wee brian]

Kurnal - you will be pleased to know that - I havent the faintest Idea what he is talking about. I bow down to your experience mate.

I'm not bad on most subjects but the only fires I have ever put out are ones that I started myself......

Respect

[Graeme]

me too

I can detect them but candles are my limit for puting them out.

[Wiz]

Ditto

If it ain't in BS5839 I ain't gotta clue.

Unless maybe, my hero, Kurnal, knowing we are out of our depth, has made it all up!!!!!

[kurnal]

Wiz
No heroics just easy questions to a guy whose only answer to a vigilon panel is a big hammer.
Thought me mate Lucky may be able to offer a few pearls of wisdom on this one tho....

[scotthall]

Thanks kurnal your a big help. cheers again

[Wiz]

Wiz
No heroics just easy questions to a guy whose only answer to a vigilon panel is a big hammer.
Thought me mate Lucky may be able to offer a few pearls of wisdom on this one tho....

Listen mate, everybody needs a hero, or two.

My other hero is Lucky. Unfortunately, he couldn't make it into this room in time to add his 'special' comments. However, he is bound to make it to here at some time and will surely make his presence felt. By the way, I have recently found him stumbling around in the 'training' and 'operations' rooms doing his normal thing. He hasn't been the same since the jelly-coptor crash you were both involved in

[fireftrm]

For foam the higher percentage is used when the burning liquid degrades the foam. For most foams 3% is used for hydrocarbon fires, but 6% is used when the HC is a polar solvent, that is a hydrocarbon soluble in water. Normally these are alcohols (beer, whisky and wine wouldn't work if alcohol wasn't a polar solvent!) which will draw the water into them and as the bubble is water the foam layer is damaged. Increasing the foam concentrate will strengthen the foam. We use Alcohol resistant foam (Angus Alcoseal, Niagara would be an equivalent) but still operate 3% for standard hydrocarbon and 6% for polar solvents.

Hydrants are located exactly as Kurnal says - depends on the risk and the location of mains.

Others exactly as Kurnal says.