Mahindra Susten Manufacturing Engineer Interview: Rounds, Questions and Preparation

What the job involves

A Manufacturing Engineer in the EV and cleantech sector plans, optimises, and scales production lines for components such as battery packs, solar modules, or power electronics. Day to day, you work on line balancing, process documentation, quality checks, and continuous improvement to hit cost, yield, and safety targets. You collaborate with design, quality, and supply chain teams to move products from prototype to mass production.

Role and Sector Knowledge

1. 1

   What does a Manufacturing Engineer do differently in an EV battery pack line compared to a traditional automotive assembly line?

   Highlight cleanliness, torque control, thermal management, and high-voltage safety. Mention traceability of cells and modules.

2. 2

   Walk me through the key steps in assembling a solar photovoltaic module.

   Cover cell sorting, stringing, layup, lamination, framing, and testing. Mention EL and flash tests for quality.

3. 3

   Why is Mahindra Susten or a similar cleantech company interesting to you as a manufacturing engineer?

   Connect personal interest in renewable energy or EVs to the company's projects. Show you know they work on solar EPC or clean energy solutions.

4. 4

   How would you explain the difference between a process FMEA and a control plan to a new operator?

   Say FMEA identifies what can go wrong and its severity, while the control plan lists how you will prevent or detect it. Use a simple example like a weld joint.

Technical Deep Dive

1. 5

   How do you calculate takt time and use it to balance a production line?

   Give the formula: available production time divided by customer demand. Explain how you redistribute tasks to match takt time.

2. 6

   What is the purpose of a torque check in battery pack assembly, and how would you set up a torque monitoring process?

   Mention safety and connection reliability. Describe using calibrated torque wrenches, setting upper and lower limits, and logging data.

3. 7

   Explain how SPC helps in controlling a soldering or welding process in EV component manufacturing.

   Talk about control charts, upper and lower control limits, and reacting to trends before defects occur. Give a specific parameter like temperature or current.

4. 8

   What are the common defects in solar module lamination, and how would you reduce them?

   List bubbles, delamination, and cell cracks. Suggest optimising lamination temperature, pressure, and time, plus incoming material checks.

Practical Scenarios

1. 9

   You notice that a battery pack assembly station is consistently missing its cycle time by 10 seconds. How do you investigate and fix it?

   Start with time study and waste analysis. Check for tooling issues, operator fatigue, or material shortage. Propose a quick kaizen and then a permanent fix.

2. 10

   A batch of solar modules fails the electroluminescence test due to micro-cracks. What steps will you take on the shop floor?

   Contain the batch, trace back to stringing or handling steps, review operator technique, and adjust equipment settings. Suggest training and handling fixtures.

3. 11

   Your production line needs to increase output by 20 percent without new capital equipment. What lean tools would you apply?

   Mention line balancing, reducing changeover time with SMED, eliminating motion waste, and cross-training operators. Show a structured approach.

4. 12

   How would you design a poka-yoke for a connector that is sometimes plugged in the wrong orientation?

   Suggest a physical keying feature, colour coding, or a sensor that prevents start until correct insertion. Explain how it prevents defects without relying on operator memory.

Behavioural and HR

1. 13

   Tell me about a time you worked in a team to complete a project under a tight deadline.

   Use STAR format. Focus on your specific contribution, how you coordinated, and the measurable outcome.

2. 14

   This role may require you to spend long hours on the shop floor. How do you feel about that?

   Show enthusiasm for hands-on work and learning from the ground up. Mention any prior internship or workshop experience.

3. 15

   Describe a situation where you had to convince someone to follow a new process or idea.

   Pick a college project or internship example. Explain how you listened to concerns, presented data, and got buy-in.

4. 16

   Where do you see yourself in three years in the EV or cleantech manufacturing field?

   Show a realistic growth path, such as becoming a process expert or leading a small team. Tie it to continuous learning and company growth.