There are several case studies and examples that you can include in your answers for the Mechanical Engineering optional subject. These examples will help you demonstrate your understanding and application of concepts in the field. Here are a few notable case studies and examples:

1. Case Study: Failure Analysis of the Tacoma Narrows Bridge
- The Tacoma Narrows Bridge was a suspension bridge in Washington, USA that collapsed in 1940 due to aeroelastic flutter.
- This case study showcases the importance of understanding structural dynamics and the effects of wind on bridge design.
- The failure led to advancements in bridge design and the study of fluid-structure interaction.

2. Example: Design and Analysis of Gas Turbine Engines
- Gas turbine engines are widely used in aircraft propulsion and power generation.
- By discussing the design considerations, thermodynamics, and aerodynamics involved in gas turbine engines, you can demonstrate your knowledge of these complex systems.
- You can also highlight the advancements in materials, cooling techniques, and efficiency improvements in modern gas turbine engines.

3. Case Study: Analysis of the Deepwater Horizon Oil Spill
- The Deepwater Horizon oil spill in 2010 was one of the largest oil spills in history.
- Mechanical engineers played a crucial role in analyzing the failure of the blowout preventer and the subsequent environmental impact.
- This case study highlights the importance of safety measures, risk assessment, and failure analysis in offshore drilling operations.

4. Example: Design and Optimization of Automotive Suspension Systems
- Automotive suspension systems play a vital role in providing comfort, stability, and handling of vehicles.
- By discussing the design considerations, types of suspensions, and optimization techniques, you can showcase your understanding of vehicle dynamics and mechanical design principles.
- You can also mention the advancements in active suspension systems and their impact on vehicle performance.

Including these case studies and examples in your answers will help you demonstrate your understanding of key concepts and their real-world applications in mechanical engineering. Remember to provide detailed explanations and highlight the significance of each case study or example in your responses.