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Why are fusees (flares) a poor choice for warning devices when fuel or other flammable liquid is leaking?
- A.Flares are illegal in every situation
- B.Flares last too long and confuse drivers
- C.Flares are too dim to be seen
- D.Their open flame can ignite vapors from the leak
Correct answer
D. Their open flame can ignite vapors from the leak
Why
A warning device that can start the fire it is warning about defeats its own purpose. Triangles and reflectors carry no ignition risk, which is why they are the standard choice around spills and damaged tanks.
Manual topic: Emergencies - Warning Devices · From the General Knowledge practice bank (GK-208).