Something that can ignite easily?
Petrol or diesel probably.
Or gas could.
Yes petrol does indeed burn easily, although it largely depends on the air/fuel mixture. - Too lean mixture => won't ignite - Too rich mixture => won't ignite Gasoline evaporates quite easily (that's why one shouldn't play with matches while handling it) which means that it can easily form a ignitable mixture with air.
There are several fuels for cars of varying combustability (if that's a word). LPG gas is the most easily ignited out in the open. Petrol evapourates when spread out and the vapour will easily ignite. If you put it in a container with a small surface area and throw a match in, it will probably go out. It needs to mix with air, at the righ proportions in order to combust. Diesel is the hardest…
The 3 conditions for combustion are: 1. Something flammable like "fuel" E.g: Wood, petrol, kerosene, alcohol(ethanol), methane, etc. 2. A right temperature to ignite. The fuel must be above a certain temperature, the temperature which something will ignite is the IGNITE POINT 3. It has to have fresh air: Oxygen
In common usage flammable liquids are the same as combustible liquids in terms of their ability to catch fire. However, in the technical usage of hazardous materials transportation and of fire prevention, a combustible liquid has a higher flash point than a flammable liquid and is therefore less easily ignited. So, yes, flammable liquids ignite more easily than do combustible liquids.
At normal outdoor ambient temperatures, and trying to light the fuels in their simple liquid states, petrol will ignite VERY easily, Diesel will not. If you soak a rag with the fuels - again the petrol will ignite and burn very easily with a 'whoosh'. The diesel soaked rag will ignite but it may take a few seconds to get going and flame will spread relatively gently across the rag. Inside the engines it is…