Question 28Safety & Environmental - Assistant Engineer
70% to passThe reading of a combustible gas indicator indicates the percentage of the _______________.
Alower explosive limit of a flammable gas concentration
Bupper explosive limit of a flammable gas concentration
Cconcentration of flammable gas in a compartment
Dconcentration by weight of nonflammable gas in a compartment
AI Explanation
The correct answer is A) the lower explosive limit of a flammable gas concentration. A combustible gas indicator measures the percentage of the lower explosive limit (LEL) of a flammable gas. The LEL is the minimum concentration of a flammable gas in air below which the mixture will not ignite. Reading the LEL percentage allows you to determine how close the gas concentration is to the explosive range. Options B, C, and D do not accurately describe what a combustible gas indicator measures.
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