Semi-portable extinguishers used on...

🔍 Key Concepts

• 46 CFR Subchapter W – Look at the sections on fire protection equipment for inspected vessels • USCG portable extinguisher size classifications (I, II, III, IV, V) and how they relate to weight/capacity • The specific definition of semi-portable versus portable fire extinguishers in Coast Guard regulations

💭 Think About

• Which extinguisher sizes are clearly defined as small, hand-carried ‘portable’ types, and which are larger units that usually have hoses and are more fixed in place? • Think about where semi-portable extinguishers are normally installed (e.g., machinery spaces) and what capacities are needed there. Which sizes fit that role? • Eliminate the options that you know are strictly portable hand extinguishers commonly found on small boats.

✅ Before You Answer

• Verify in 46 CFR 25.30 and related fire protection tables how the Coast Guard labels sizes I–V as portable vs semi-portable • Check which sizes require mounting brackets and fixed location versus simple hand stowage • Confirm which size numbers are associated with larger agent capacities appropriate for engine rooms on inspected vessels

Semi-portable extinguishers used on inspected vessels are sizes __________.

IV and V

III, IV, and V

I, II, and III

II, III, and IV