While civil engineering is primarily concerned with the design, construction, and maintenance of infrastructure and large$-$scale projects, it is also deeply intertwined with various theoretical frameworks. One theoretical question that could be posed is: "How does the application of fluid mechanics principles impact the design and operation of hydraulic structures in civil engineering projects?" This question delves into the theoretical underpinnings of fluid dynamics and its practical implications in civil engineering. It prompts exploration into topics such as Bernoulli's principle, the Navier$-$Stokes equations, and flow regimes, and their relevance in designing hydraulic structures like dams, channels, and pipelines. Additionally, it encourages analysis of how fluid mechanics theories inform decision$-$making processes related to optimizing the efficiency, safety, and sustainability of hydraulic systems in civil engineering applications. By grappling with this question, students or professionals in civil engineering can deepen their understanding of the fundamental principles governing fluid behavior and its profound influence on infrastructure design and operation.