Question 65Safety & Environmental - 1st Asst/Chief

The correct answer is D) All of the above. For a marine chemist to issue a "safe for workers, safe for hot-work" certificate for a compartment, all three conditions must be met: 1) The residues in the compartment must not be capable of producing any toxic gas under existing atmospheric conditions. 2) The concentration of combustible gases in the compartment's atmosphere must be less than 10 percent of the lower flammable limit. 3) The toxic gases in the compartment's atmosphere must be within permissible concentrations. All three criteria are required to ensure the compartment is safe for workers and hot-work operations. The other options (A, B, and C) are incorrect because they only address one or two of the necessary conditions, rather than the full set of requirements.