You have the factory standing behind the certified pre-owned car, plus you'll be buying a car that the original manufacturer has inspected to ensure that it is worthy of certification. The only downside to certified pre-owned cars is that they are generally more expensive than other used cars.ot all used cars can qualify for certified pre-owned programs, and terms vary from one brand to the next, but any true certified pre-owned program will include at least a 100-point inspection of the car. If problems are found, the factory-trained technicians will fix it or disqualify the car from the program.
hydrogen is flammable yes, but not very. because it is the least dense element it disperses very quickly meaning if it were to leak out of something it would disperse before it could ignite. It also burns very fast and has a higher ignition temperature than gasoline (gasoline is between 228 and 500, hydrogen is 550).
The ignition temperature is affected by the chemical properties of the flammable liquid. When a flammable liquid is in its liquid state, it will not ignite. It will only burn when in its gaseous state.In addition to ignition temperature, other properties associated with the flammability of a liquid are its flash point, flammable range, and vapor density.The flash point is the temperature at which a flammable liquid vaporizes and is therefore able to ignite.Liquids with a flash point under 40 Â°C are considered combustible liquids. Gasoline has a flash point of about -45 Â°C.he ignition temperature is affected by the chemical properties of the flammable liquid. When a flammable liquid is in its liquid state, it will not ignite. It will only burn when in its gaseous state.