Brain Teasers Optical Illusions Puzzle Hunts Codes & Ciphers Mechanical Puzzles
Personal Links
Browse Teasers
Search Teasers

Where There's Smoke There's Fire?

Science brain teasers require understanding of the physical or biological world and the laws that govern it.


Puzzle ID:#23326
Fun:*** (2.92)
Difficulty:** (2.08)
Submitted By:od-1Aca****
Corrected By:Dave




Mr. Od-1 had just bought a new factory to start producing hydrogen gas for his alternatively fueled vehicles. For safety reasons, there could be no flammable materials in the factory, just steel and concrete. Nothing was even painted. He then hired a company to install a state of the art fire protection system. They had installed hundreds of highly sensitive smoke detectors throughout the factory. Each was linked to a sprinkler control unit so, if triggered, it would immediately open the sprinkler above the fire. Thus, it would save the whole factory from water damage in the event of a fire. After much testing, the system was working perfectly. But when Mr.Od-1 inspected the system, he couldn't believe the colossal mistake they had made. He called the designers of the system in and explained to them, "This is a hydrogen plant. There are no flammable materials allowed in the plant, and employees wear fire proof clothing while in the plant; the only thing that can catch fire is the hydrogen itself." Understanding their mistake, the system designers rebuilt the system.
What had they done wrong?


They had installed smoke detectors only, with no heat detection system.
Burning hydrogen doesn't produce any smoke or fumes. There were no other flammable items allowed in the plant, so a fire could have burned for some time undetected by the smoke detectors.


What Next?


See another brain teaser just like this one...

Or, just get a random brain teaser

If you become a registered user you can vote on this brain teaser, keep track of
which ones you have seen, and even make your own.


Back to Top

Online Now
4 users and 501 guests

Users In Chat
Follow Braingle!
Tap into all 20,000+ of our brain teasers, riddles and puzzles on your iPhone or iPad.
Braingle in the iTunes App Store
Copyright © 1999-2017 | FAQ | Widgets | Links | Green | Subscribe | Contact | Privacy | Conditions | Advertise | Braingle Time: 2:20 am
Sign In Create a free account