Arizona Driving Permit Written Practice Exam

The lower explosive limit (LEL) is the:

Maximum concentration of gas that will burn Minimum concentration of combustible gas or vapor in air that will ignite The temperature at which a gas freezes The lowest pressure a gas can be stored at

Correct Answer:

Minimum concentration of combustible gas or vapor in air that will ignite

Explanation:

LEL is the lowest concentration of gas in air capable of producing a flash of fire in the presence of an ignition source.

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