I see alot of the yellow hydrant signs where I live in the UK and I wondered what they mean. I take it the signify a hydrant in the vicinity but sometimes they have numbers on top and bottom. What do they mean?
Here's an example: http://www.mawwfire.gov.uk/images/hydrant_sign.gif
2007-05-25 05:17:08 · 4 answers · asked by Solid 2 in Science & Mathematics ➔ Other - Science
The top number is the diameter of the water main pipe - in this case 100mm.
The bottom number is the distance they have to go to find the hydrant plate in the ground - in this case 3m.
2007-05-25 05:30:22 · answer #1 · answered by Philip W 7 · 2⤊ 0⤋
Hospital maybe? I have no idea...I live in the US. If it does indicate a hydrant, maybe the numbers signify a coordinate for location for city/firefighter folks.
100th block of grid 3 say.....beats me. Just a wild guess.
2007-05-25 13:51:08 · answer #2 · answered by Anonymous · 0⤊ 0⤋
I think the number indicate the water pressure or gallons per minute or something.
2007-05-25 12:20:39 · answer #3 · answered by Lady Geologist 7 · 0⤊ 1⤋
probaly that hydrogen has 100 protons and 3 electrons
making it a positive charge
2007-05-25 12:24:11 · answer #4 · answered by Anonymous 4 · 0⤊ 4⤋