What is the generally accepted method of determining whether the atmosphere within a cargo tank is explosive, too rich, or too lean to support combustion?

Correct Answer: Option B — Use an explosimeter.

Under USCG Deck Safety, SOLAS Chapter III, and 46 CFR regulations, when addressing 'What is the generally accepted method of determining whether the atmosphere within a cargo tank is explosive, too rich, or too lean to support combustion', the mandated standard is: 'Use an explosimeter.'.