eli5: How is leaving your engine running while refueling dangerous?

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Like people leave their engines idling while waiting for a pump and that’s not an issue… and if there was a chance of a spark traveling back along the line and ignigting the tank (and thus, the station), then why doesn’t this happen during normal operation?

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Anonymous 0 Comments

You’re filling the tank at a gas station with your car running. You expect the auto fill to trip and shut down the pump when the tank is full. Sometimes it doesn’t trip and ends up pumping gasoline all over the ground. This fuel on the ground vaporizes and if anything is hot enough near it, or a spark, kaboom.

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