Zypp Electric Vehicle Test Engineer Interview: Rounds, Questions and Preparation

What the job involves

A Vehicle Test Engineer in the EV and mobility sector plans and executes tests on electric two-wheelers and three-wheelers, covering battery performance, motor controllers, brakes, suspension, and rider safety systems. Day to day, you run road and lab tests, log data from sensors and CAN bus, analyse failures, and work with design and production teams to fix issues before vehicles go into fleet service. At fast-growing companies like Zypp Electric, you also test vehicles under real delivery and rental conditions to ensure reliability and low downtime.

Role and EV Technical Knowledge

1. 1

   What are the key differences between testing an electric two-wheeler and a petrol two-wheeler?

   Cover battery pack, BMS, motor controller, regen braking, absence of gears, and new safety risks like high-voltage handling and thermal runaway.

2. 2

   How would you test a battery pack for a delivery fleet that runs 80 to 100 km per day?

   Mention depth of discharge, cycle life testing, temperature effects, fast charging impact, and real-world range validation under load.

3. 3

   What is CAN bus and why is it important in vehicle testing?

   Explain it as a communication protocol between ECUs, and how you use it to log motor RPM, battery voltage, current, temperature, and fault codes.

4. 4

   What sensors and instruments would you use to measure brake performance on an e-scooter?

   Include wheel speed sensors, accelerometers, brake pressure sensors, and a data logger to calculate stopping distance and deceleration.

Practical Testing and Diagnosis Scenarios

1. 5

   A fleet e-scooter shows sudden power loss after 20 minutes of riding. How would you approach the diagnosis?

   Start with battery voltage and temperature logs, check BMS fault codes, motor controller temperature, and loose connections, then reproduce the issue under similar load.

2. 6

   During a road test, the vehicle pulls to one side while braking. What could be the causes and how would you test them?

   Consider uneven brake pad wear, misaligned wheels, suspension imbalance, or tyre pressure differences, and suggest a controlled test with measurements.

3. 7

   How would you plan a durability test for a new suspension setup on a three-wheeler used for goods delivery?

   Cover test route selection, load conditions, number of cycles, data logging of shock travel and vibration, and pass/fail criteria.

4. 8

   You notice the motor controller overheating during a long uphill test. What data would you collect and what fixes would you suggest?

   Log controller temperature, current draw, ambient temperature, and duty cycle, then suggest derating, better cooling, or firmware tuning.

Standards, Safety, and Documentation

1. 9

   What safety precautions must be followed when working on a high-voltage EV battery pack?

   Mention PPE, insulated tools, lockout-tagout, voltage verification, working in pairs, and following manufacturer service procedures.

2. 10

   Which Indian or international standards apply to electric two-wheeler testing?

   Reference AIS 038, AIS 156 for battery safety, CMVR, and relevant ISO or IEC standards for electrical safety and EMC.

3. 11

   How do you document a test failure so that the design team can act on it quickly?

   Describe a clear test report with vehicle ID, test conditions, data logs, photos, observed behaviour, and a root cause hypothesis.

4. 12

   What is the difference between validation testing and verification testing?

   Verification checks if the product meets specified requirements, while validation checks if it meets the actual user need and works in real conditions.

Behavioural and HR Questions

1. 13

   Tell us about a time you worked on a project with a tight deadline. How did you manage it?

   Use a STAR example from college projects or internships, focusing on prioritisation, teamwork, and delivering a working result.

2. 14

   Why do you want to work in the EV mobility sector, especially with a fast-growing company?

   Show genuine interest in clean mobility, willingness to learn fast, and comfort with field testing and startup pace.

3. 15

   This role requires frequent road tests and sometimes early morning or late evening shifts. Are you comfortable with that?

   Answer honestly, mention any prior experience with field work or long hours, and express adaptability without overpromising.

4. 16

   Describe a situation where you found a mistake in your own work. What did you do?

   Show ownership, quick correction, and what you changed in your process to avoid repeating the mistake.