🔍 Key Concepts

• Boiler operation after water washing of the fireside • Effects of rapid vs gradual heating on boiler brickwork, tubes, and refractory • Proper use of forced draft, burners, and steam when drying a boiler

💭 Think About

• Think about which method will dry the furnace and gas passages thoroughly while keeping metal and refractory stress low. • Ask: Does this procedure use heat and airflow in a way that is controlled and gradual, or could it cause cracking, warping, or carryover of moisture? • Which option best matches the kind of normal operating equipment you would safely use during boiler warm‑up and drying, rather than a special or extreme method?

✅ Before You Answer

• Identify which choices involve direct firing and consider if the cycle and duration seem reasonable for a slow, even warm‑up. • Check if any option might lead to thermal shock or damage to refractory/brickwork because of too much heat too quickly or very high‑temperature steam. • Consider whether simply moving air or placing drying agents would be sufficient to drive moisture out of thick metal and refractory surfaces after a water wash.