🔍 Key Concepts

• Small passenger vessel fire protection regulations in 46 CFR Subchapter T • Maintenance and servicing intervals for fixed and semiportable fire extinguishing systems • Difference between inspection frequency and replacement of premixed foam agent

💭 Think About

• Is the required interval for replacing premixed foam the same as for all fire system inspections, or is it a specific, longer/shorter period? • Think about why premixed foam might need replacement at a set time, even if it hasn’t been used. What changes over time? • Consider which of the choices sounds like a typical regulatory replacement cycle for chemicals that can degrade.

✅ Before You Answer

• Verify the exact wording in 46 CFR for small passenger vessels on premixed foam replacement, not just general extinguisher checks. • Check whether regulations distinguish between periodic replacement and replacement only after use. • Confirm that the required time interval is expressed in months and matches one of the listed options.