🔍 Key Concepts

• Function and location of the mud drum in a water-tube boiler • Where sediment and sludge tend to collect in a boiler • Purpose of a bottom blow and what it is trying to remove

💭 Think About

• In a water-tube boiler, where does the heaviest sludge and scale naturally settle, high or low, and in which drum or area? • Is a bottom blow valve placed where clean steam is produced, or where dirty water and sediment collect? • Which component in the answer choices is specifically associated with collecting boiler mud, scale, and impurities?

✅ Before You Answer

• Identify which part of the boiler is lowest in the circulation system and designed to collect sludge • Eliminate any components that mainly handle steam space rather than water and mud • Confirm which option is specifically known for blowdown and sludge removal in water‑tube boilers