absolutly no light, all is reflected and you had a little one way mirror about one millimeter in diameter in which no light could escape from the shere(it could only enter) and you shone in with a high power laser, what would happen? would it heat up and explode or would there just be an intense build up of light or what?
some of them do , others are just pumps , thats why they should be vey near of the hydrants , you know , water is very heavy to be effectively and fast carried in an emergency situation
No, unless it's a tanker truck. They're the ones that look like the trucks that haul milk. Usually firefighters tap into the hydrants if they're available.
Some do for rural fires, some use hydrants for city fires
Change the battery. The beep is a reminder that the battery is dying. Is the replacement battery brand new? If it's old or used it may have lost some of it's charge. Try to carefully clean it. If neither works, get a new smoke detector. It would guarantee that it would stop beeping and would be safer if it's the detector that's dying.
Depends on the engine. Some are tankers and some are pumpers. You see those fire hydrant things along the street, that's where they get water.
