Tech Mahindra Design Engineer Interview Questions and Answers

Q1. Questions regarding different CAD softwares
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Q2. Questions regarding automobile parts
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Q1. Designing of different Parts in UG NX
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Designing of different parts in UG NX
• UG NX is a computer-aided design software used for designing various parts

• Designing parts in UG NX involves creating 3D models, defining dimensions, and adding features

• The software offers a wide range of tools and features for efficient part design

• Examples of parts that can be designed in UG NX include mechanical components, electrical enclosures, and consumer products
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Q1. What is gd&t and what is the use of gd&t
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GD&T stands for Geometric Dimensioning and Tolerancing. It is a system for defining and communicating engineering tolerances.
• GD&T is a symbolic language used on engineering drawings to specify the allowable variations in form, size, and orientation of features.

• It helps to ensure that parts and assemblies will fit together and function properly.

• GD&T uses symbols such as concentricity, flatness, perpendicularity, and pos...read more
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Q2. Explain about 321 principle
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The 321 principle is a design principle that involves prioritizing features based on their importance and impact.
• 3 - Must-have features that are essential for the product

• 2 - Should-have features that are important but not critical

• 1 - Nice-to-have features that are desirable but not necessary

• Prioritizing features based on their impact on the overall design and user experience
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Q1. Which part they will give you for remastering?
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Remastering involves enhancing existing designs for improved functionality and aesthetics, focusing on user needs and modern standards.
• Evaluate the current design for usability issues, such as a medical device that may need ergonomic adjustments.

• Incorporate modern materials for durability, like using carbon fiber in aerospace components.

• Update the design to meet current safety standards, such as revising a consumer pro...read more
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Q1. 1] Creating 3d model. 2] WHAT IS CASTING PROCESS 3] WHAT IS SHEET METAL 4] GD&T
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Casting process involves pouring molten metal into a mold to create a desired shape. Sheet metal is metal formed into thin, flat pieces. GD&T stands for Geometric Dimensioning and Tolerancing.
• Casting process involves melting metal and pouring it into a mold to create a specific shape.

• Sheet metal is metal that has been formed into thin, flat pieces, often used in manufacturing for various applications.

• GD&T is a system f...read more
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Q2. WHAT IS GD&T IN MECHANICAL? DESCRIBLE ALL IN DETAILS .
Ans. 
GD&T stands for Geometric Dimensioning and Tolerancing, a system used in mechanical engineering to define and communicate engineering tolerances.
• GD&T is a symbolic language used on engineering drawings to specify the allowable variation in form, size, and orientation of features.

• It helps ensure that parts and assemblies will fit together and function properly.

• GD&T uses symbols such as squares, circles, and triangles to...read more
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Q3. WHICH POINTS CONSIDERED DURING CASTING FEASIBLITY?
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Points to consider during casting feasibility include material selection, part geometry, draft angles, wall thickness, and surface finish.
• Material selection - Choose a material suitable for the part's function and properties.

• Part geometry - Ensure the part can be easily cast without complex shapes or undercuts.

• Draft angles - Include draft angles to allow for easy removal of the part from the mold.

• Wall thickness - Maint...read more
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Q4. UG NX COMMANDS?
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UG NX is a software used for designing, engineering, and manufacturing products.
• UG NX commands are used for creating and editing 3D models.

• Some common UG NX commands include Extrude, Revolve, Fillet, and Sweep.

• Commands can be accessed through the toolbar or by typing in the command line.

• UG NX also has advanced features like synchronous technology for flexible editing.

• Users can customize commands and create macros for r...read more
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Q1. Walk me through your profile.
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I am a passionate Design Engineer with expertise in product development, CAD modeling, and innovative design solutions.
• Bachelor's degree in Mechanical Engineering from XYZ University.

• 3 years of experience in product design at ABC Corp, focusing on consumer electronics.

• Proficient in CAD software like SolidWorks and AutoCAD, having designed components for a new smartphone model.

• Led a team project that reduced production ...read more
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Q2. What are your responsibilities in your previous organisation?
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Q3. Are you aware of GD&T?
Ans. 
Yes, GD&T stands for Geometric Dimensioning and Tolerancing, a system for defining and communicating engineering tolerances.
• GD&T is a system used in engineering to define and communicate tolerances for manufacturing and inspection.

• It uses symbols, such as concentricity, flatness, and perpendicularity, to specify geometric characteristics of parts.

• GD&T helps ensure that parts are manufactured and inspected consistently ...read more
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Q4. Which are the operations performed on sheet metal to increase the strength of it without changing thickness?
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Operations like bending, folding, and crimping can increase the strength of sheet metal without changing its thickness.
• Bending: This process involves bending the sheet metal along a straight line to increase its strength.

• Folding: Folding the sheet metal creates multiple layers, increasing its strength.

• Crimping: Crimping involves creating small indentations or folds in the sheet metal to increase its rigidity.

• Rolling: R...read more
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Q5. Do you know modelling in CREO?
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Yes, I am familiar with modeling in CREO, a powerful CAD software for 3D design and engineering.
• Proficient in creating parametric models using CREO's robust feature-based design tools.

• Experience with assembly modeling, allowing for the integration of multiple components into a single assembly.

• Skilled in using advanced surfacing techniques for complex geometries, such as automotive body panels.

• Familiar with simulation t...read more
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Q6. What are the parts that you've designed in creo and what is the application?
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I have designed various parts in Creo for applications in automotive, aerospace, and consumer electronics industries.
• Designed engine components for automotive industry

• Designed aircraft structural components for aerospace industry

• Designed smartphone casings for consumer electronics industry
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Q7. From your experience what are the factors that needs to be considered while designing a component for sheet metal and plastic?
Ans. 
Factors to consider when designing components for sheet metal and plastic
• Material selection based on properties and application requirements

• Design for manufacturability to ensure ease of production and cost-effectiveness

• Consideration of material thickness and bending radius for sheet metal components

• Wall thickness, draft angles, and rib design for plastic components

• Integration of features like fastening methods, mounti...read more
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Q8. What are your salary expectations?
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Q1. What do you know about MBD?
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MBD stands for Model-Based Design, a methodology used in engineering to develop systems using models as the primary source of information.
• MBD involves creating a model of the system being designed, which can be used for simulation, verification, and automatic code generation.

• It helps in reducing development time and costs by allowing engineers to test and validate designs before physical implementation.

• Popular tools us...read more
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Q2. Do you know the symbol of position tolerance?
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Yes, the symbol for position tolerance is a circle with a horizontal line through the middle.
• The symbol for position tolerance is a circle with a horizontal line through the middle

• It is used in engineering drawings to specify the allowable deviation in the location of a feature

• Position tolerance controls the location of a feature relative to a specified datum
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Online aptittude test - 1 hr

Q1. Introduce yourself questions on the projects that you have done questions on hobbies
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Q1. Tell about yourself tell about company location behavior questions
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