🔍 Key Concepts

• fuel oil heater construction and how steam and oil are separated (tube vs. shell side) • What oil in steam drains indicates about the integrity of the heater (possible tube leak) • The safest immediate response when fuel oil may be leaking into the steam side

💭 Think About

• Ask yourself: If oil is getting into the steam drain, what failure inside the heater could cause that, and how serious is it? • Which choice best prevents spreading contamination into other parts of the system while keeping the plant safe? • Which options could actually make a leak or contamination problem worse rather than better?

✅ Before You Answer

• Verify which action removes the suspect heater from service instead of continuing to operate it. • Check which options would increase pressure or flow through a possibly damaged heater and why that’s risky. • Confirm which response aligns with standard engineering practice when a heat‑exchanger tube leak is suspected.