Most Commonly Asked Interview Questions & Answers for Mechanical Engineers

 

Are you an aspiring mechanical engineer? If yes, then you must be aware of the top 10 mechanical design engineer interview questions that are asked in almost every interview. Most of the questions focus on the basic concepts of mechanical engineering, but there are also a few that focus on the specific skills required for the job.

 

Knowing the answers to these questions will not only help you prepare for the interview but also help you understand the role of a mechanical engineer better. So, without further ado, let's take a look at the top 10 interview questions for design mechanical engineer that you must be aware of.

 

Trending Cad Design Engineer Interview Questions in 2022

 

1. Describe the significance of CAD

Answer: Prosthetics, industrial and architectural design, shipbuilding, automobile and aerospace manufacturing, and many more fields employ CAD, which is a crucial industrial art. 

 

2. What steps comprise the process of product development?

Answer: Product development is a preliminary process where all of the design documentation is created depending on the expectations of the client, market, and budget. Manufacturing tools including machine tools, molds, etc. are needed for production. If none already exist, we will have to create them. 

The manufacturing equipment must then be purchased or created, which might take a long time and be expensive. Production, which includes part production and assembly, is the final step.

 

3. What abilities do you believe a mechanical engineer needs to have in order to succeed?

Answer: The purpose of this mechanical engineering interview question is for the interviewer to learn more about your viewpoint. You might respond, "Out of all the skills that a mechanical engineer must possess, the most significant is a problem-solving skill," or anything along those lines. In order to address a problem, a person must be able to consider several options and make decisions about what might happen. Additionally, they must be creative and attempt other methods if the first one doesn't work.

 

4. What was your college project, and how was the experience of working on it?

Answer: While I was in college, I worked on a project to build a hand pump. Under the direction of the HOD, a group of six students conducted an extensive study before drawing and writing stage-by-stage project reports. Overall, the experience was enjoyable and instructive.

Here, the interviewer checks whether the candidate actively participated in college group assignments. If the answer sounds satisfactory, now the applicant faces a round of technical analysis.

 

Technical Interview Questions for CAD Design Engineer

 

1. What distinguishes a hydraulic system from a pneumatic system?

Answer: Both hydraulic and pneumatic systems use fluid power, but there are some very important distinctions between them. For example:

1. Liquid is used in hydraulic systems to operate them. While in pneumatics, the system is operated with gas or air.
2. More power is generated by the hydraulic system. The pneumatic system has a lower power output.
3. The hydraulic system is difficult to use because of its high pressure. The pneumatic system, however, is simple to use.
4. The upkeep for hydraulic systems is extensive. The pneumatic system is inexpensive and simple to maintain.
5. In comparison to pneumatic systems, the working fluid in hydraulic systems is more expensive.
   
   

2. What distinguishes an electric motor from an electric generator?

Answer: An electric motor and an electric generator are identical in their basic operation. All motors function like generators in our everyday lives, and all generators act like motors. 

 

However, an electric generator produces electrical energy, as the name says. An electric motor consumes electricity. Aside from that, an electric generator converts mechanical energy into electrical energy and an electric motor converts electrical energy into mechanical energy.

3. What is the Rankine Cycle?

Answer: A thermodynamic cycle that transforms heat into mechanical energy is the Rankine cycle, often known as the Rankine vapour cycle. William Johnson Macquorn Rankine, a Scottish engineer and physicist best known for his studies of the thermodynamic characteristics of steam, is the name-bearer of the Rankine cycle. 

 

A Rankine cycle system consists of four components: a pump, a boiler, a turbine, and a condenser. The pump's responsibility is to pressurize water and send itsupply liquid to the boiler. The function of the boiler is to heat the waterliquid and convert it to steamvapour. A turbine is then driven by the steam generated in boilervapour. The turbine's task is to convert the kinetic energy of steam to mechanical energyheat energy from the heated fluid into useful energy. The steamvaporised liquid is subsequently cooled in the condenser so that it returns to a liquid state. The condenser's liquid is inflated by the pump, and the cycle keeps going.

4. Orthographic Drawing: What is it?

Answer: A two-dimensional representation of a three-dimensional object is called an orthographic sketch. The lines are orthogonal to the projection plane.

We witness objects from every angle, just as one would perceive them in three dimensions. This helps with the manufacturing process by allowing for easier management of the hidden features and linking components that are difficult to see in a three-dimensional item.

5. Mention different types of screw and what are their applications?

Answer: There are numerous varieties of screws. When working with wood, wood screws composed of bronze, brass, or steel are employed.

For drywall panels, drywall screws are utilised. W-type screws and S-type screws are the two varieties available.

Self-tapping screws can be used as metal sheet screws, wood screws, or drywall screws. They are employable without a drill.

Metal sheet screws are all-purpose fasteners that can be used to join rubber, plastic, metal, or plywood anywhere.

Pre-drilling is necessary for masonry screws since they lack a pointed end.

 

6. Explain mechanical refrigeration

Answer: A man-made heat-exchanger system is used in the mechanical refrigeration process to remove heat from a system. This refrigeration system could be magnetic, thermoelectric, cyclic, or non-cyclic. The use for which refrigeration is required determines the answer. It is also known as Carnot Cycle which is a perfect closed thermodynamic cycle that involves isothermal expansion to a desired set point, adiabatic extension to a desired location, isothermal compression, and adiabatic contraction back to the starting state for the working substance.

 

Conclusion 

The average salary of a mechanical engineer in India is around 4 lacs per annum.Because the fundamentals of technicality are crucial, the level of design engineer interview questions and answers is significantly greater than that of other interview questions. 

Unlock the premium access of Skill-free Lync's Mechanical Engineering course if you want to learn more about how the industry works. It is a fantastic introduction to the world of Mechanical Engineers. For engineers with the necessary skills, the course offers a wide range of positions. With a Skill-Lync degree in hand, you can become a part of the Mechanical Engineering sector in India right away by arming yourself with industry-relevant skills and tools.

All of these factors combined with a person who exudes confidence can aid in your success. Despite its challenges, mechanical engineering is a fantastic profession to pursue as a career. Understanding how things work and how they operate on a general basis as these events and machines are employed in our daily lives is fun.