🔍 Key Concepts

• Fire main system requirements on MODUs under 46 CFR (Mobile Offshore Drilling Units) • When a fire pump is allowed to be used for non‑fire services • The idea of maintaining full fire-fighting capability even when the pump is used for something else

💭 Think About

• Ask yourself: If the main fire pump is being used for another purpose, what must still be true about its immediate availability for firefighting? • Consider which options ensure that correct pressure and flow are preserved on the fire main at all times. • Think about whether having just one of these conditions is enough, or whether the regulation expects a combination of protections.

✅ Before You Answer

• Verify which choice(s) ensure that the required fire main pressure is always available when needed. • Check whether the rules require a separate dedicated fire pump if the main pump is used for other services. • Confirm if the regulation talks about pressure control (reducing station, manifold) AND redundancy, not just one or the other.