Question 729 Deck Safety

70% to pass

Which instrument is suitable for determining the presence of explosive concentrations of fuel oil vapors in tanks?

A A flame safety lamp
B A liquid cargo meter
C A combustible gas indicator
D All of the above
AI Explanation

The correct answer is C) A combustible gas indicator. A combustible gas indicator is specifically designed to detect the presence of explosive concentrations of fuel vapors, which is essential for safely working around fuel tanks. It measures the concentration of flammable gases and vapors in the air, allowing for the detection of potentially hazardous conditions. The other options are not suitable for this purpose. A flame safety lamp is used to detect the presence of oxygen, but not specifically for fuel vapors. A liquid cargo meter measures the volume or level of liquid cargo, but does not detect explosive gas concentrations.

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Official Resources
46 CFR Lifesaving Equipment USCG Marine Safety Center USCG National Maritime Center
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