Fires occur when a competent ignition source and a fuel come together, provided what condition is met?

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Multiple Choice

Fires occur when a competent ignition source and a fuel come together, provided what condition is met?

Explanation:
Ignition requires heat to be transferred from the ignition source to the fuel for a sufficient time so the fuel reaches and maintains its ignition temperature. Even with a competent source and the presence of oxygen, without staying in contact long enough, heat is lost to the surroundings and the fuel won’t ignite. So the essential condition is that the contact lasts long enough for enough heat transfer to occur to ignite the fuel.

Ignition requires heat to be transferred from the ignition source to the fuel for a sufficient time so the fuel reaches and maintains its ignition temperature. Even with a competent source and the presence of oxygen, without staying in contact long enough, heat is lost to the surroundings and the fuel won’t ignite. So the essential condition is that the contact lasts long enough for enough heat transfer to occur to ignite the fuel.

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