3B1 ABSA Questions And Answers 2025/2026
3B1 ABSA Questions And Answers 2025/2026 Combustion air for the burners is preheated to ______ in the air heater section by combustion gases leaving the economizer section. - Correct Answer 350°C Most downcomers run horizontally between the steam drum and the mud drum. - Correct Answer False Steam bubbles form in the hottest tubes and rise to the steam drum where the steam is separated out of the water and steam mixture. Circulation is maintained by water returning to the mud drum through the cooler tubes. The hotter tubes (the risers) are the ones in the radiant area of the furnace and the hottest areas of the generating bank of tubes. - Correct Answer True What is the main advantage of the packaged boiler? - Correct Answer Low cost Generally, two types of draft fans are used. A(n) _____ ____ fan supplies air to the air preheater. The preheated air for combustion goes to the coal pulverizers and to the burners. A(n) ______ ____ fan exhausts the combustion gases from the air heater to the stack. - Correct Answer Forced draft, induced draft One square metre of heating surface equals 10 kilowatts. The heating surface of a boiler must be determined by computing the area of the surface involved in square metres. Where a computation is to be made of a curved surface, the surface with the greate
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