Which of the following is not an advantage of corrugated and ring-reinforced furnaces?

Corrugated and ring-reinforced furnaces are designed with specific features that enhance their performance in various applications. The advantage of producing greater turbulence in the furnace is related to enhancing heat transfer efficiency; however, this turbulence can also have negative effects such as increased wear and tear or uneven heat distribution under certain conditions.

Options related to the benefits of corrugations and reinforcement generally focus on structural integrity and heat transfer efficiency. For instance, corrugations are crucial in managing thermal expansion differences, helping to prevent stress-related damage within the furnace. Additionally, the design of corrugated furnaces typically provides an increased surface area, allowing more heat transfer between the combustion gases and the water or steam inside, which improves the overall efficiency of the furnace.

Reinforced furnaces can indeed utilize thicker materials, which helps to withstand higher pressures and temperatures, ultimately leading to better heat transfer as well.

In contrast, the claim that corrugations cause greater turbulence does not fit within the conventional understanding of the advantages provided by such designs, thus making it the correct answer for this question. The focus is primarily on enhancing performance without introducing the complexities that could arise from excessive turbulence.