Question 4 of 30
A combustible gas indicator will operate correctly ONLY when the
hydrocarbon content of the atmosphere is less than the U.E.L.
atmosphere is deficient in oxygen
compartment to be tested is free of CO2 **Correct answer : hydrocarbon content of the atmosphere is less than the U.E.L.**
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Answer & Explanation
The correct answer is Option A: hydrocarbon content of the atmosphere is less than the U.E.L..
Combustible gas indicators are designed to measure gas concentrations up to the Upper Explosive Limit (U.E.L). Above this level, the mixture is too rich to burn, potentially resulting in inaccurate or misleading readings.