Give an example of a time when you had to conduct research to find a solution to a design challenge.

Sample answer to the question

In my previous role as a Junior Mechanical Engineer, I encountered a design challenge when tasked with developing a more efficient cooling system for an industrial machine. To find a solution, I conducted thorough research on different cooling methods and technologies available in the market. I studied the principles of thermodynamics and the properties of various cooling fluids. Additionally, I reached out to industry experts and attended technical seminars to gather insights and expertise. After gathering all the necessary information, I proposed a novel cooling system design that utilized a combination of liquid cooling and heat sinks. This design proved to be highly effective in managing the machine's temperature and improving overall performance. By conducting extensive research and leveraging my knowledge of mechanical engineering principles, I was able to successfully overcome the design challenge and deliver a cutting-edge solution.

A more solid answer

During my time as a Junior Mechanical Engineer, I encountered a design challenge when tasked with optimizing the performance of a high-speed conveyor system. The system was experiencing excessive vibration, resulting in reduced efficiency and increased wear and tear. To find a solution, I embarked on a comprehensive research endeavor. Initially, I reviewed the system's specifications and conducted a thorough analysis of its mechanical components. This analysis revealed potential design flaws that could contribute to the vibration issue. To gain further insights, I consulted relevant academic journals, industry publications, and engineering forums. This enabled me to explore different theories and best practices for reducing vibration in similar systems. Through this research, I discovered the benefits of implementing damping techniques, such as tuned mass dampers, to mitigate vibrations. Leveraging my knowledge in mechanical engineering principles and my proficiency in CAD software, I developed a detailed design for the incorporation of tuned mass dampers into the conveyor system. This solution not only reduced vibration levels but also improved the system's overall efficiency and reliability. By conducting comprehensive research, analyzing data, and applying my engineering skills, I successfully resolved the design challenge and delivered a practical and effective solution.

Why this is a more solid answer:

The solid answer goes into greater detail, explaining the specific steps taken during the research process and the impact of the candidate's solution. It demonstrates their analytical skills, problem-solving abilities, and knowledge in thermodynamics and materials science. However, it could still benefit from providing more specific examples of the candidate's research sources and the exact improvements achieved through their solution.

An exceptional answer

As a Junior Mechanical Engineer, I encountered a complex design challenge when assigned to optimize the aerodynamic performance of a racing car. The goal was to reduce drag and increase downforce without compromising stability. To tackle this challenge, I conducted extensive research by studying the aerodynamics of high-performance vehicles, including race cars and aircraft. I familiarized myself with computational fluid dynamics (CFD) software, such as ANSYS Fluent, to simulate airflow around the car and identify areas of high drag. Additionally, I collaborated with the aerodynamics team and attended technical conferences to gain insights into cutting-edge aerodynamic concepts and technologies. Armed with this knowledge, I proposed several design modifications, including optimizing the vehicle's body shape, implementing aerodynamic appendages, and utilizing active aerodynamics. Using CAD software, I developed detailed 3D models to validate and refine these modifications. The final design enhancements resulted in a significant reduction in aerodynamic drag and an increase in downforce, ultimately improving the car's lap times and overall performance on the race track. Through my thorough research, innovative thinking, and collaboration with experts in the field, I successfully tackled the design challenge and contributed to the team's success.

Why this is an exceptional answer:

The exceptional answer provides a highly detailed account of the candidate's research process and the impact of their solution. It showcases their exceptional analytical skills, problem-solving abilities, and knowledge in thermodynamics and materials science. The candidate demonstrates their willingness to go above and beyond by familiarizing themselves with advanced CFD software and actively seeking collaboration with experts in the field. The solution provided not only achieved the primary objective but also resulted in significant performance improvements. However, to further enhance the answer, the candidate could provide specific metrics or results achieved through their design enhancements.

How to prepare for this question

Familiarize yourself with industry publications, academic journals, and engineering forums to stay updated on the latest research and best practices in your field.
Gain proficiency in CAD software and other engineering tools to effectively visualize and analyze design solutions.
Develop a solid understanding of thermodynamics and materials science principles to tackle complex design challenges.
Attend technical conferences, seminars, and workshops to network with experts in your field and gain insights into cutting-edge technologies and methodologies.
Collaborate with multidisciplinary teams and senior engineers to leverage their knowledge and expertise while solving design challenges.

What interviewers are evaluating

Analytical skills
Problem-solving skills
Knowledge in thermodynamics and materials science