A combustible gas indicator will operate correctly ONLY when the
Direct Answer
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.
All Options
Detailed Explanation & Context
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.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Advanced Training for Oil Tanker Cargo Operations (TASCO).
Practice Full TASCO Set 6
Test yourself with 30 interactive questions, live timer, and instant score.