L&T Technology Services Senior Design Engineer Interview Questions, Process, and Tips

Defects in injection moulding can lead to product failures and increased costs, impacting quality and production efficiency.

• Short Shots: Occurs when the material doesn't fill the mold completely, leading to incomplete parts. Example: Missing sections in a plastic casing.

• Warpage: Distortion of the part after cooling, often due to uneven cooling rates. Example: A warped lid that doesn't fit properly.

• Sink Marks: Indentati...read more

Effective strategies to mitigate injection molding defects include process optimization, material selection, and design adjustments.

• Optimize injection speed: Adjusting the injection speed can reduce defects like short shots and voids.

• Control cooling time: Proper cooling time prevents warping and ensures uniform part dimensions.

• Select appropriate materials: Using high-quality materials can minimize issues like sink mark...read more

Plastics are versatile materials with various types, each having unique properties suitable for different applications.

• Polyethylene (PE): Lightweight, chemical-resistant, used in packaging.

• Polypropylene (PP): Durable, heat-resistant, used in automotive parts.

• Polyvinyl Chloride (PVC): Rigid or flexible, used in pipes and flooring.

• Polystyrene (PS): Rigid, good insulator, used in disposable cutlery.

• Polyethylene Terephthal...read more

Faced project delays and resource constraints; implemented agile methodologies and cross-functional collaboration to enhance efficiency.

• Identified bottlenecks in project timelines; introduced weekly stand-up meetings to improve communication and accountability.

• Faced resource shortages; collaborated with HR to streamline hiring processes, reducing time to onboard new engineers by 30%.

• Encountered design challenges with a...read more

Understanding CATIA's A Surface for rear combination design in automotive engineering.

• A Surfaces are used for complex shapes, like car body panels.

• Utilize the 'Surface' workbench in CATIA for creating A Surfaces.

• Example: Designing a rear combination lamp housing requires precise A Surface modeling.

• Ensure continuity with adjacent surfaces for optimal aesthetics and functionality.

• Use tools like 'Join' and 'Trim' to refin