To hire a mechanical engineer, you have to ask the right questions that will enable you to learn as much as possible about their skills and knowledge. Mechanical engineering is a challenging industry that requires mathematical intelligence, creative skills, and technical expertise.
One way to better understand your candidates’ knowledge is to use assessments such as the Mechanical Reasoning test. The test requires candidates to answer questions based on their knowledge of physics and mechanics.
Another crucial part of assessing applicants is the interview stage. But what questions should you ask?
Discover 70 interview questions for mechanical engineering roles, with sample answers to help you hire the right person.
Table of contents
- 26 general interview questions for mechanical engineers
- 5 sample answers to general interview questions for mechanical engineers
- 20 behavioral interview questions to learn more about mechanical engineers
- 5 sample answers to behavioral interview questions for mechanical engineers
- 24 personality interview questions for mechanical engineers
- 5 sample answers to personality interview questions for mechanical engineers
- When should you use skill assessments in your hiring process?
- Use our interview questions and skill tests to hire talented mechanical engineers
- ✅ Find and hire the best mechanical engineers with TestGorilla
26 general interview questions for mechanical engineers
Check out these 26 common interview questions for mechanical engineer roles to better understand your candidates’ knowledge, skills, and work experience in engineering.
1. How did you decide to go into mechanical engineering?
2. Talk about your first engineering design.
3. What skills do you think a mechanical engineer should have?
4. How would you explain complex designs to someone without experience in mechanical engineering?
5. What are the different types of fits?
6. What do you do to improve your engineering skills?
7. Define a process-flow diagram.
8. How do hydraulics work on a machine?
9. What is the difference between a strut and a column?
10. What is the second law of thermodynamics?
11. Explain the difference between a tube and a pipe.
12. What elements do you need to increase the corrosion resistance of steel?
13. What computer programs do you use in mechanical engineering?
14. What are the different types of springs?
15. Do you have experience with using torque?
16. Explain the advantages of cycloidal and involute gears.
17. Define hydraulic brake, mechanical brake, and electric brake.
18. Can you give examples of some of the guidelines for designing castings?
19. What is a universal coupling? How do you use it?
20. Do you prefer to use pneumatics to control machinery or another method?
21. What is mechanical refrigeration?
22. What is the difference between metal and non-metal materials?
23. Describe the similarities between strain and stress.
24. What does a greenfield project mean?
25. What is meant by pitting?
26. Can you explain what coal is?
5 sample answers to general interview questions for mechanical engineers
Use these sample answers to five of the common mechanical engineer interview questions when assessing applicants’ responses.
1. How would you explain complex designs to someone without experience in mechanical engineering?
Candidates should talk about their communication skills and ability to describe engineering designs when answering this question.
For example, they might use images or videos to explain cycloidal and involute gears. Candidates should be able to strike a balance between simplifying terms and being direct in their explanation.
Send candidates a Communication test to better assess their verbal and non-verbal communication skills and professional etiquette. According to research, 68% of employees say they’ve wasted time because of inefficient communication, so hiring someone who can express their ideas clearly is essential.
2. What are the different types of fits?
The ideal candidate will know what mechanical fits are. They should get a bonus point if they explain each fit and how it works in the context of engineering work. You can also compare their answers after they have completed the Mechanical Reasoning test.
Below are the different types of fits in mechanical engineering:
- Clearance fit: The air space or clearance between two shafts is called clearance fit. This fit allows more free movement when bolts and shaft holes slide freely without obstruction.
- Interference fit: Engineers use interference to fit two mated parts, meaning there will always be an overlap in the joints. You can do this by pushing two components together with force.
- Transition fit: A transition fit falls between clearance and interference. The tolerance zone of the shaft has to align with the other mating parts. This fit is usually smaller compared to interference.
3. Define a process-flow diagram.
A process-flow diagram (PFD) is a flowchart that shows the relationships between equipment, plant processes, and other significant components at an industrial plant. Mechanical engineers can use this diagram to improve a process or create a new one, improving quality control and efficiency.
4. What computer programs do you use in mechanical engineering?
Strong candidates will be familiar with the most popular software tools used in engineering. They could provide examples of software that has helped them to complete specific tasks.
For instance, mechanical engineers can use programs such as Solid Edge to create 3D designs, while MATLAB focuses on equations and mathematical analysis of chemicals or materials.
However, not all projects require using complex computer programs. Some candidates might prefer to use Microsoft Excel when documenting projects, for example.
Use a Microsoft Excel test to better understand your candidates’ technical skills and ability to perform basic calculations. This way, you can also determine whether they require any additional training when they join the company.
5. Define hydraulic brake, mechanical brake, and electric brake.
Mechanical engineers will often need to make use of brakes in their roles. Therefore, candidates should know what they are and how they may use them:
- Hydraulic: This brake uses a special type of hydraulic fluid to move pressure from the controlling mechanism to the brake controls. You can find these breaks in automobiles or light trucks.
- Mechanical: Engineers use mechanical brakes the most because they dissipate kinetic energy to slow or stop machinery and wheels. The sudden friction ensures there is no more force in the brake.
- Electric: These electromagnetic brakes use a rapid electrical current to stop the rotation of moving parts. Using mechanical resistance, this brake can be used in hybrid and electric vehicles.
Companies need to hire professionals who have enough experience and knowledge of how to use different components in their work, such as breaks.
20 behavioral interview questions to learn more about mechanical engineers
Below are 20 behavioral interview questions for mechanical engineer applicants. Choose a few questions to learn more about your candidates’ engineering mindset and processes.
1. Tell me about a time you disagreed with a team member. How did you resolve the conflict?
2. How do you check a project for flaws?
3. What is your approach to changing deadlines? How does this affect your work?
4. You join a multidisciplinary team but they don’t trust your judgment. What do you do?
5. How do you prioritize projects under pressure?
6. Describe a time you went above and beyond to finish a design.
7. How do you maintain professional relationships with stakeholders?
8. How would you calculate the power of a machine?
9. Can you provide an example of when you had to optimize a mechanical design to meet weight and strength requirements?
10. How do you troubleshoot and solve problems with a mechanical system?
11. Tell me about a time you worked with a team to design something from scratch.
12. How do you respond to negative feedback?
13. How do you provide feedback to other team members?
14. You have two projects that are due on the same day. What do you do?
15. Describe a time you used problem-solving skills to figure out a design problem.
16. What practices do you follow to catch any errors in your work?
17. Explain a written technical report or presentation you had to complete.
18. Do you often take the lead in projects?
19. Give an example of a mechanical design flaw you found during testing. How did you fix it?
20. If an engineer injures themself at work, what steps should you follow?
5 sample answers to behavioral interview questions for mechanical engineers
Review these sample answers to some of the behavioral interview questions above to hire the right candidate. Every response will be unique, but it should still include relevant facts and personal examples.
1. Tell me about a time you disagreed with a team member. How did you resolve the conflict?
Team members are bound to experience conflict, especially in demanding jobs. New research has discovered that over 36% of employees face disagreements regularly. Therefore, your candidates must have the skills and patience to resolve conflict professionally.
For example, the candidate may choose to set up a meeting with the other party to explain their reasoning and work on finding a solution together. To handle conflict situations, all team members should communicate frequently and know how to give and receive feedback.
Send candidates a Problem-solving test to see how they respond to challenging situations in the workplace.
2. What is your approach to changing deadlines? How does this affect your work?
In the engineering industry, deadlines can change incredibly quickly. Some factors that cause these changes include resource delays or weather conditions. Candidates should have the right approach when it comes to tight or challenging deadlines.
Some candidates might drop unnecessary tasks to meet the deadline, while others may create a comprehensive to-do list to avoid getting overwhelmed. There isn’t a right or wrong answer, but you should make a note of what each candidate says during their interviews.
Use a Time Management test to determine how well candidates prioritize, plan, and execute projects in mechanical engineering.
3. Can you provide an example of when you had to optimize a mechanical design to meet weight and strength requirements?
Experienced candidates can prove their expertise with weight and strength management by providing a relevant example. They should explain previous designs and how they collaborated with team members to meet project requirements.
For example, they could talk about the creation of a robotic arm for new machinery. In this case, they may have had to use light materials to design an arm that could move heavy objects around the manufacturing facility.
Through their design process, they might have met the necessary strength and weight conditions, while getting creative ideas from other team members.
It’s worth using a Critical Thinking test to assess your applicants’ capacity to analyze information. This test will determine which candidates can solve complex problems and use creativity to devise new approaches.
4. Tell me about a time you worked with a team to design something from scratch.
For this question, candidates should give an answer that shows their communication, teamwork, and creativity skills. They might discuss their work in a previous job and how it expanded their knowledge of mechanical engineering.
Statistics show that 89% of employees say creativity helps them achieve business objectives, so hiring a candidate who is able to come up with innovative strategies is essential.
A strong example will include enough information about the main goal and the process.
For instance, applicants might have worked as a team to design the technical components and create an automated testing system. Building something from scratch requires plenty of teamwork and consistent communication.
5. What practices do you follow to catch any errors in your work?
Everyone has their unique process when it comes to identifying errors. The ideal candidate will explain how they catch errors in mechanical designs and prevent them from happening again.
You could also test their attention to detail by giving them visual designs with inconsistencies and mistakes. Those who notice the errors quickly may have more experience with designs and quality control.
Send candidates an Attention to Detail (Visual) test to see whether they’re able to catch visual errors and notice small details.
24 personality interview questions for mechanical engineers
Here are 24 personality interview questions for mechanical engineer candidates. Use these questions to learn more about their behavior and career goals.
1. Do you prefer to work independently or in a team?
2. What is your least favorite task in the role of a mechanical engineer?
3. Describe a time when you failed to accomplish a task in your job.
4. How do you stay up-to-date with the latest technology?
5. What is your most successful engineering project?
6. What will be your biggest challenge in this mechanical engineering position?
7. Where do you see yourself in five years?
8. What is the first thing you designed on your own?
9. How do you set personal development goals?
10. What is the best way of learning from your mistakes?
11. How do you motivate your team to complete challenging tasks?
12. Why do you want to be a mechanical engineer for our company?
13. What inspires you to work in the engineering industry?
14. Have you ever taken online courses? Would you consider it?
15. Describe the steps you take when developing plans for a project.
16. Who was your go-to person when you encountered a problem on a design project?
17. What do you do when you face an angry client?
18. What are some unique ways of documenting your tasks?
19. Which traits make you a stronger mechanical engineer?
20. What steps do you take to maintain a safe work environment?
21. Would you rather lead design teams or follow others?
22. Share an example of how you have applied your skills to on-site work.
23. What is your most significant weakness as an engineer?
24. How has your education prepared you for this career?
5 sample answers to personality interview questions for mechanical engineers
Refer to these sample answers to evaluate the candidates’ responses when choosing someone for your mechanical engineering role.
1. Describe a time when you failed to accomplish a task in your job.
There will be times candidates have failed to complete a specific task. However, the key to assessing your applicants’ responses is to focus on how they learned from the challenge rather than on their struggles.
For example, candidates might discuss their experience with meeting project requirements. As they respond, note how they fixed the mistake or found ways to complete projects without compromising on weight and strength requirements.
You can also use a Big 5 (OCEAN) personality test to evaluate how the applicants’ traits could help them handle their mechanical engineer duties and challenges.
2. What will be your biggest challenge in this mechanical engineering position?
Every candidate will have fears or concerns about accepting a new role. They might have previously faced specific challenges in mechanical engineering that make it hard for them to remain confident.
Research suggests that employees are concerned about limited growth opportunities or not being able to develop their skills in a demanding job. Applicants might share similar concerns.
You can note down their responses to better understand their weaknesses, strengths, and personal concerns. Be wary of candidates who don’t express any worries – they may not be completely honest during the interview.
3. Would you rather lead design teams or follow others?
This question will help you determine whether the candidate is a potential leader. Some candidates have natural leadership capabilities when it comes to teamwork. They might want to delegate tasks and support those who are new or struggling.
Candidates who prefer to follow are also just as valuable. Followers tend to be open-minded and have strong communication skills. Selecting a candidate will depend on who you’d want to join your team, how they could contribute to upcoming design projects, and which applicants match your company’s mission and vision.
Consider sending candidates a Leadership and People Management test to evaluate their leadership skills and ability to guide others at the job.
4. How do you stay up-to-date with the latest technology?
Since mechanical engineering focuses on technology, it’s essential that candidates have experience with mechanical power machines and engineering products. They should monitor recent technological advancements and how they might change or benefit the industry.
Some ways of staying up-to-date with technology are to:
- Read news from reputable sources (including blogs or specialized websites)
- Join social events and tech conferences
- Review the latest mechanical engineering job descriptions
- Use Google trends
- Find updated research reports on technology
- Sign up for relevant newsletters
- Connect with other professionals in their field
- Follow tech leaders on social media
5. How do you motivate your team to complete challenging tasks?
Mechanical engineering can be a very demanding industry.
For example, designing intricate blueprints for the manufacturing of complex machines is an especially challenging task. There may be times when team members struggle to complete their duties. The ideal candidate will know exactly how to motivate them and provide support.
Only 32% of US employees feel engaged in their work. To increase this percentage, hire candidates motivated to succeed and grow.
A Motivation test can tell you more about a candidate’s personality traits. Hiring determined mechanical engineers is key to building a positive work culture and maintaining employee motivation.
When should you use skill assessments in your hiring process?
You should use skill assessments before conducting your interviews. These tests can help you identify talented professionals with the right skills and knowledge to perform their duties.
When they complete an assessment, candidates have to answer questions related to their current skills, level of expertise, or values and mindset.
For example, you may use a 16 Types personality test to better understand their behavior and mindset. To evaluate their cognitive function, use assessments such as the Following Instructions test.
Once your candidates complete each test, you can compare their answers. These data-driven results are key to recognizing skilled mechanical engineers.
Use our interview questions and skill tests to hire talented mechanical engineers
Now that you have a wide set of interview questions you could use, it’s time to find the best skill tests.
Search our test library to discover assessments related to cognitive function, personality, situational judgment, programming, and more. These tests can help you objectively assess candidates and quickly shortlist the best.
For more guidance, sign up for a free 30-minute live demo. Our team can suggest relevant skill tests that can enhance your hiring process. With extra support, you won’t have to spend long choosing and interviewing job applicants.
Are you ready to find a skilled mechanical engineer? Use our comprehensive skill assessments and interview questions to hire the best.
- What was the first thing you ever designed? ...
- How would you explain a car's wheel and axle system to a layperson? ...
- Why do customers buy a product? ...
- What do you enjoy about working on a team? ...
- What is a new engineering skill you've acquired in the last year?
- Don't Underestimate the Tool Test. ...
- Theoretical Concepts Aren't Enough to Crack the Interview. ...
- Begin Working on Industry-Oriented Projects. ...
- Only 6.4% of Mechanical Engineers Are Employable. ...
- Pick Your Domain and Specialize in It.
Technical interview questions may cover what kinds of materials you've previously worked with, what your CAD (computer-aided design) software of choice may be, and whether you have experience with mechanical refrigeration.What are 3 skills you need to be a mechanical engineer? ›
- Creativity. Mechanical engineers design and build complex pieces of equipment and machinery. ...
- Listening skills. Mechanical engineers often work on projects with others, such as architects and computer scientists. ...
- Math skills. ...
- Mechanical skills. ...
- Problem-solving skills.
In physics and engineering, the quality factor or Q factor is a dimensionless parameter that describes how underdamped an oscillator or resonator is. It is defined as the ratio of the initial energy stored in the resonator to the energy lost in one radian of the cycle of oscillation.What is the top skill a mechanical engineer must have? ›
- Excellent technical skills, including computer-aid design experience.
- The ability to work under pressure.
- Problem-solving skills.
- Interpersonal and teamworking skills.
- Excellent verbal and written communication skills.
- Commercial awareness.
- Ask clarifying questions before you even start writing code. ...
- Talk through your code (think out loud) to give the interviewer a window into your thoughts. ...
- Speak clearly and precisely. ...
- If you're stuck, stay calm, think out loud, and try new ideas.
- What do you enjoy most about being an engineer?
- What was your very first engineering design?
- What is your favorite CAD design software and why?
- Have you developed any new engineering skills recently?
- What is the most important skill for an engineer?
Only 6.4% of Mechanical Engineers are employable
When I say employable, it essentially means they are either employed in the core jobs, or they work in the teaching domains with respect to their core subject.
Manufacturing. Mechanical Design. System Dynamics and Control. Transportation Systems.
Mechanical engineering is one of the broadest engineering disciplines. Mechanical engineers design, develop, build, and test. They deal with anything that moves, from components to machines to the human body.Why should we hire you as mechanical engineer? ›
“Over the years, I have acquired relevant skills and experience, which I shall bring to your organization. I have also worked tirelessly on my communication abilities and teamwork skills, which I will put to use in my future career, which would be in your organization if I am selected for the position.Which engineer has highest salary? ›
- Systems Engineer. ...
- Electrical Engineer. ...
- Chemical Engineer. ...
- Big Data Engineer. ...
- Nuclear Engineer. ...
- Aerospace Engineer. ...
- Computer Hardware Engineer. ...
- Petroleum Engineer.
Emotional intelligence, communication, empathy, teamwork, leadership, and adaptability are examples of soft skills. All these skills help a mechanical engineer understand how to go about designing, maintaining, and building mechanical systems by communicating with team members and users.What are basic mechanical skills? ›
Basic mechanical skills using hand and power tools in an industrial environment. Topics include tool use and maintenance, lubrication, measuring, threads and fasteners, bench works, basic mechanical drawings, and basic shop calculations (English and metric).What is quality in mechanical engineering? ›
Quality in engineering is the standard by which a company measures and improves its products during the development process rather than after a team finishes the product.What is quality in mechanical? ›
Mechanical quality control is a set of mechanical checks that detects potential errors in translated content that are easily missed by the human eye. These include omissions, numerical errors, inconsistencies, and punctuation issues in the translation compared to the source text.What is QA and QC in mechanical? ›
Quality Assurance is the process or set of processes used to measure and assure the quality of a product and Quality Control is the process of ensuring products and services meet consumer expectations.
- Product design. Product design is creating and evaluating new products in terms of customer requirement and functionality. ...
- Proficiency in mechanical engineering tools. ...
- Software. ...
- Math. ...
- Creativity. ...
- Problem-solving. ...
- Teamwork. ...
- Attention to detail.
233512 MECHANICAL ENGINEER
Plans, designs, organises and oversees the assembly, erection, operation and maintenance of mechanical and process plant and installations. Registration or licensing may be required.
- 1 – Talking about the salary. ...
- 2 – Irrelevant or absurd questions. ...
- 3 – Talking bad about your last job. ...
- 4 – Being casual. ...
- 5 – Body language. ...
- 6 – Not being prepared. ...
- 7 – Showing off.
- Understand Your Audience. ...
- Sharpen Your Skills. ...
- Identify Your Unique Selling Points. ...
- Remember to Sell Your Soft Skills. ...
- Get Up to Date. ...
- Build Your Network.
- 1: What are the requirements? ...
- 2: How can I make it in a way that it works? ...
- 3: How can I reduce the carbon footprint? ...
- 4: What material is best suited for this application? ...
- 5: How can we produce it? ...
- 6: What is the most economical and efficient way to produce it?
- How long have you been with the company?
- Has your role changed since you've been here?
- What did you do before this?
- Why did you come to this company?
- What's your favorite part about working here?
- What's one challenge you occasionally or regularly face in your job?
The STAR method is a structured manner of responding to a behavioral-based interview question by discussing the specific situation, task, action, and result of the situation you are describing.Can a mechanical engineer make 300K a year? ›
Yes, engineers can make $300K.
However, the only engineers who earn that much money have worked their way up the corporate ladder. In many companies, for instance, the only way to reach a salary of $300K is by becoming a vice president (VP) or a senior vice president (SVP).
This salary is based on the intermediate level of mechanical engineering ranging between an entry-level candidate, who can make approximately $55,000 upon entry, and a senior-level candidate, who can make upwards of $200,000 in the top 10%.Can mechanical engineers make 100k? ›
Yes, you can make $100,000 per year as a mechanical engineer. The chances of earning over $100k for a mechanical engineer are actually pretty good because the highest-paid mechanical engineer positions typically pay at least $101,000 per year.What is a Level 5 mechanical engineering? ›
The Level 5 Advanced Technician Diplomas in Engineering focus on advanced engineering, with a wide choice of units to provide a flexible route to career success as a professional engineer.What is the hardest thing in mechanical engineering? ›
Thermodynamics is a hard class because of the subject matter. Thermodynamics, heat transfer, and fluids are all based on the same core principles and are all infamously known to be very difficult classes. Thermodynamics typically comes before heat transfer and fluids.
Summary. Students are introduced to the five fundamental loads: compression, tension, shear, bending and torsion.Why is mechanical engineering so difficult? ›
The field of mechanical engineering ranks as one of the hardest majors in part because of its technical requirements. Students must take advanced mathematics and science courses as part of their training.How old is a mechanical engineer? ›
9.4% of all mechanical engineers are women, while 90.6% are men. The average age of an employed mechanical engineer is 40 years old.How old was the youngest mechanical engineer? ›
Richard Sibbick, 31, from Cardiff, has broken a 161-year record to become the youngest mechanical engineer to become a Fellow, the highest level of professional recognition from the IMechE.What is the first topic in mechanical engineering? ›
Mechanical Engineering Syllabus for first year includes Engineering Mathematics, Engineering Graphics, General Chemistry, Material Science, and Basic Electronics and Electronic Circuits.What is mechanics in simple words? ›
Mechanics is the branch of Physics dealing with the study of motion when subjected to forces or displacements, and the subsequent effects of the bodies on their environment.What should I learn first in mechanical engineering? ›
If you want to be a mechanical engineer, you'll need to start studying math and science, including calculus and thermodynamics, which is the study of heat and how it relates to other energy forms.What's your greatest weakness? ›
Answer “what is your greatest weakness” by choosing a skill that is not essential to the job you're applying to and by stressing exactly how you're practically addressing your weakness. Some skills that you can use as weaknesses include impatience, multitasking, self-criticism, and procrastination.What to answer to why should we hire you? ›
- Show that you have skills and experience to do the job and deliver great results. ...
- Highlight that you'll fit in and be a great addition to the team. ...
- Describe how hiring you will make their life easier and help them achieve more.
- Track your stressors. Keep a journal for a week or two to identify which situations create the most stress and how you respond to them. ...
- Develop healthy responses. ...
- Establish boundaries. ...
- Take time to recharge. ...
- Learn how to relax. ...
- Talk to your supervisor. ...
- Get some support.
- Be on time. ...
- Know the interviewer's name, its spelling, and pronunciation. ...
- Have some questions of your own prepared in advance. ...
- Bring several copies of your resume. ...
- Have a reliable pen and a small note pad with you. ...
- Greet the interviewer with a handshake and a smile.
- Tell me about yourself.
- Why are you interested in working for this company?
- Tell me about your education.
- Why have you chosen this particular field?
- Describe your best/worst boss.
- In a job, what interests you most/least?
- What is your major weakness?
Tell me about yourself and why you want to be a Mechanical Engineer? SUGGESTED ANSWER: “I am naturally an inquisitive person who enjoys working in a team environment where the ability to problem-solve and collaborate with others is an essential part of the role.How to prepare for mechanical design engineer interview? ›
Talk about the first engineering design you produced. What did you learn from it? Speaking about your engineering experience is a great way to help the interviewer get to know you better in a mechanical engineering job interview, as well as helping you to demonstrate how you approach different tasks.What are 3 questions engineers ask? ›
What do I want next? What do I want to learn next? Who do I want to learn from?What motivates you as a mechanical engineer? ›
Mechanical engineers design and build solutions to a range of problems, improving efficiency across a wide range of industries. By studying mechanical engineering, you can look forward to good job prospects, high salaries, and varied work.How do you pass an engineering interview? ›
- Show your social skills. While engineers need to be smart, they also need to be sociable. ...
- Bring up previous projects. ...
- Leave your electronics behind. ...
- Be thoughtful about your response. ...
- Show your thought process. ...
- Ask the right questions.
Tolerance is the total amount a dimension may vary and is the difference between the upper (maximum) and lower (minimum) limits. Because it is impossible to make everything to an exact size, tolerances are used on production drawings to control the parts.