How is solid trash and garbage generally admitted to a solid-waste incinerator on most ships?

Correct Answer: Option C — The trash is admitted manually via a loading door.

Most marine solid-waste incinerators are designed for batch processing. Solid trash and garbage are manually loaded through a secure, interlocked door to ensure the combustion chamber remains sealed during operation, preventing the escape of smoke or flames and maintaining the negative pressure required for safe and efficient incineration.