According to the material, what is the explosive range (Exp Range) for Methane (CH4)?

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Multiple Choice

According to the material, what is the explosive range (Exp Range) for Methane (CH4)?

Explanation:
Understanding the explosive range means knowing the concentration window in air where methane can ignite and flame can propagate. For methane, this range is defined by the lower explosive limit (LEL) and the upper explosive limit (UEL). In air, methane typically has an LEL around 5% by volume and a UEL around 15% (some references list 15.4%). So the explosive range is about 5% to 15.4% methane in air. The option that matches this material value, 5-15.4%, is the best choice because it uses the precise upper limit given. Other ranges shift either the lower or upper bound and would not align with the stated figures.

Understanding the explosive range means knowing the concentration window in air where methane can ignite and flame can propagate. For methane, this range is defined by the lower explosive limit (LEL) and the upper explosive limit (UEL). In air, methane typically has an LEL around 5% by volume and a UEL around 15% (some references list 15.4%). So the explosive range is about 5% to 15.4% methane in air.

The option that matches this material value, 5-15.4%, is the best choice because it uses the precise upper limit given. Other ranges shift either the lower or upper bound and would not align with the stated figures.

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