Question 72Steam Plants - Assistant Engineer70% to pass
The useful life of furnace refractory is affected most by _______________.
AI Explanation
The correct answer is C) large and rapid changes in furnace temperature.
The useful life of furnace refractory, which is the heat-resistant material lining the inside of a furnace, is most affected by large and rapid changes in furnace temperature. Sudden temperature fluctuations can cause the refractory material to expand and contract, leading to cracking, spalling, and accelerated deterioration. This is a key factor that impacts the lifespan of the refractory lining.
The other options are incorrect because they do not have as direct an impact on the refractory as the rapid changes in furnace temperature. The quality of the fuel, improper boiler water treatment, and high steady steaming loads can affect other aspects of furnace operation, but they are not the primary drivers of refractory degradation.
Related Questions
#70 A corbel is used in a boiler furnace to _______________.#71 A secondary function of the refractory installed in a marine boiler is to _______________.#73 An advantage of using boiler furnace studded water wall tubes packed with refractory is that _______________.#74 Which of the tube types listed can be considered to serve as downcomers at low firing rates, and as generating tubes at high firing rates on some boilers? #75 In a D-type boiler, which of the tubes listed would be located in the generating tube bank?