5th Class Power Engineering Exam 2026 – 400 Free Practice Questions to Pass the Exam

Flue gas baffles in bent tube boilers serve to improve heat transfer efficiency. Their primary function is to redirect the flow of flue gases within the boiler, maximizing the contact between the gases and the surfaces of the heat exchange tubes. This increased surface interaction enhances the transfer of heat from the flue gas to the boiler's water, leading to more efficient steam generation.

By carefully designing the placement and configuration of these baffles, engineers can optimize the flow patterns, thereby ensuring that heat is captured effectively and reducing the amount of wasted energy. Improved heat transfer also minimizes the formation of hot spots and ensures a more uniform temperature throughout the heat exchanger surfaces, contributing to the overall operational efficiency of the boiler.

Other options provided may touch on important aspects of boiler operation, but they do not accurately characterize the specific function of flue gas baffles. For instance, enhancing structural integrity primarily pertains to the support and framework of the boiler, while reducing emissions involves different technologies focused on treating exhaust gases. Thus, the role of flue gas baffles is distinctly about facilitating better heat transfer within the system.