Polycab India Design Engineer Interview: Rounds, Questions and Preparation

What the job involves

Design Engineers in manufacturing and automobile sectors create and refine product designs, components, and systems using CAD tools and engineering principles. They work on new product development, cost reduction, and quality improvement, often collaborating with production and quality teams. At companies like Polycab India, they may design electrical products such as wires, cables, and switchgear, ensuring compliance with standards and manufacturability.

Role and Technical Knowledge

1. 1

   What is GD&T and why is it important in design engineering?

   Explain that GD&T (Geometric Dimensioning and Tolerancing) defines allowable variations in form, orientation, and location, ensuring parts fit and function correctly. Mention its role in reducing manufacturing costs and improving quality.

2. 2

   How do you select materials for a new product? What factors do you consider?

   Discuss mechanical properties (strength, hardness), thermal and electrical conductivity, corrosion resistance, cost, availability, and manufacturability. Give an example like choosing copper for electrical conductors due to high conductivity.

3. 3

   Explain the difference between design for manufacturing (DFM) and design for assembly (DFA).

   DFM focuses on simplifying manufacturing processes to reduce cost and time, while DFA aims to reduce the number of parts and ease assembly. Both are part of DFMA to optimize product design.

4. 4

   What are the key considerations when designing a product for the Indian market?

   Highlight cost sensitivity, local manufacturing capabilities, compliance with BIS standards, voltage fluctuations, and environmental conditions like high humidity and temperature.

Practical Scenarios

1. 5

   You are designing a new cable for Polycab. How would you ensure it meets safety and performance standards?

   Discuss referring to IS 694 or IEC 60227 standards, conducting tests for insulation resistance, voltage withstand, and flammability, and using simulation tools to validate design before prototyping.

2. 6

   A component you designed is failing in the field. How would you approach root cause analysis?

   Mention using tools like Fishbone diagram, 5 Whys, and FMEA. Suggest collecting field data, inspecting failed parts, and testing hypotheses to identify design or manufacturing defects.

3. 7

   How would you reduce the cost of an existing product without compromising quality?

   Talk about value engineering, material substitution, optimizing tolerances, reducing part count, and negotiating with suppliers. Emphasize testing to ensure quality is maintained.

4. 8

   You need to design a new switchgear enclosure. What steps would you follow from concept to production?

   Outline requirements gathering, concept design, CAD modeling, simulation (thermal, structural), prototyping, testing, design review, and collaboration with manufacturing for production.

Behavioural and Situational

1. 9

   Tell me about a time you worked in a team to complete a project. What was your role?

   Use STAR method: describe the situation, task, action, and result. Highlight your contribution, teamwork, and any challenges overcome.

2. 10

   Describe a situation where you had to learn a new software or tool quickly.

   Show adaptability and self-learning. Mention the tool, how you learned it (online courses, tutorials), and how you applied it to solve a problem.

3. 11

   How do you handle criticism of your design work?

   Emphasize openness to feedback, focusing on improvement, and using criticism to refine designs. Give an example of incorporating feedback positively.

4. 12

   Give an example of a time you missed a deadline. What did you do?

   Be honest, explain the reason, and focus on corrective actions taken, such as better planning or communication. Show accountability and learning.

HR and Company Fit

1. 13

   Why do you want to work as a Design Engineer in the manufacturing sector?

   Express passion for creating tangible products, solving real-world problems, and contributing to India's manufacturing growth. Mention interest in continuous learning and innovation.

2. 14

   What do you know about Polycab India and its products?

   Research Polycab's product lines (wires, cables, switchgear, fans, etc.), its market position, and recent initiatives. Show genuine interest in the company's work.

3. 15

   Where do you see yourself in five years?

   Align your goals with the company's growth. Mention gaining expertise, taking on leadership roles, and contributing to innovative projects.

4. 16

   How do you handle working under pressure?

   Discuss prioritization, time management, and staying calm. Give an example from academics or internships where you managed multiple tasks effectively.