Marelli Senior R&D Engineer Interview Questions and Answers

First round is aptitude test all type of questions asked like verbal, reasoning and Technical

Q1. Explain stress, strain curve diagram with example?
Ans. 
Stress-strain curve shows relationship between stress and strain in a material under tension.
• Stress-strain curve is a graphical representation of how a material deforms under stress.

• It typically consists of a linear elastic region, a yield point, plastic deformation, and ultimate failure.

• Example: Steel has a high yield strength, so its stress-strain curve shows a steep initial slope.

• Example: Rubber has a low yield stre...read more
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Q2. What is DOF? How many degrees of freedom from any object
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DOF stands for Degrees of Freedom. It refers to the number of independent parameters that define the configuration of an object.
• DOF is the number of ways a rigid body can move in 3D space.

• For a rigid body in 3D space, there are 6 degrees of freedom - 3 translational and 3 rotational.

• Examples of DOF include linear motion along x, y, z axes and rotational motion around x, y, z axes.
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Q1. Explain various GD&T
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Geometric Dimensioning and Tolerancing (GD&T) is a system for defining and communicating engineering tolerances.
• GD&T is used to specify the allowable variations in form, size, and orientation of features on a part.

• It uses symbols, such as concentricity, flatness, and perpendicularity, to communicate the desired tolerances.

• GD&T helps ensure that parts fit together properly and function as intended.

• Examples of GD&T symbo...read more
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Q2. Explain DFM, DFS, DFA
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DFM, DFS, and DFA stand for Design for Manufacturing, Design for Service, and Design for Assembly, respectively.
• DFM focuses on designing products that are easy and cost-effective to manufacture.

• DFS focuses on designing products that are easy to service and maintain.

• DFA focuses on designing products that are easy to assemble.

• Consideration of DFM, DFS, and DFA principles can lead to more efficient and cost-effective prod...read more
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Q1. Few questions about SFD and BMD
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Tough one to attempt

Q1. Asked questions related to few mechanical engineering topics
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Written test related to casting and plastic

Q1. Related to experience
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Q1. Expectation and why you want tomove
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Q1. Rate yourself for power electronics circuit designing
Ans. 
I rate myself 8 out of 10 for power electronics circuit designing.
• I have extensive experience in designing power electronics circuits for various applications.

• I am proficient in using simulation tools like LTSpice and MATLAB for circuit analysis and design.

• I have designed and implemented several power electronics circuits, including DC-DC converters, inverters, and motor drives.

• I keep myself updated with the latest tre...read more
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Q2. Currently Which kind of work you are doing? Which technique you follow to solve if any problems occure in the team
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I am currently working as a Sr. Engineer in design.
• I am responsible for designing and developing new products.

• I collaborate with cross-functional teams to gather requirements and ensure design feasibility.

• I use various techniques like brainstorming, prototyping, and simulation to solve problems.

• I encourage open communication and teamwork to address any issues that arise within the team.

• I also conduct regular design rev...read more
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Q1. Part drawing 2D or 3D
Ans. 
2D is a flat picture while 3D is one that has depth.
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Q2. Sketcher 2d drawings
Ans. 
First of all we sketch 2d drawings after we assembly the complete object
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Q3. Assembly all part drawing
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When 2D sketch complete, after we calling parts to make complete assembly.
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Q4. Generative Sheet metal
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Q5. Generative drafting
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