Okaya EV Vehicle Test Engineer Interview: Rounds, Questions and Preparation

What the job involves

Vehicle Test Engineers in the EV sector plan and run tests on electric two-wheelers and three-wheelers to validate battery, motor, controller, and vehicle-level performance, safety, and durability. Day to day they prepare test vehicles and instrumentation, execute road and lab tests, log data, and report issues to design and quality teams. At fast-growing EV makers like Okaya EV, they also support homologation, field failure analysis, and continuous improvement of test methods.

Role and EV Fundamentals

1. 1

   What does a Vehicle Test Engineer do in an EV company, and how is it different from a design engineer?

   Explain that test engineers validate designs through physical testing, while design engineers create the systems. Mention activities like test planning, instrumentation, data analysis, and issue reporting.

2. 2

   Walk me through the main components of an electric two-wheeler powertrain and what each does.

   Cover battery pack, BMS, motor, motor controller, throttle, and display. Briefly state the function of each and how they interact.

3. 3

   What is the difference between a battery cell, module, and pack? Why does this matter for testing?

   Explain the hierarchy and that testing happens at each level. Mention that pack-level tests include vibration, thermal, and safety checks, while cell-level tests focus on capacity and cycle life.

4. 4

   Why is regenerative braking important in EVs, and how would you test it?

   State that it recovers energy and extends range. For testing, mention measuring energy recovery, braking feel, and controller response under different speeds and battery states.

Testing Methods and Instrumentation

1. 5

   How would you plan a range test for an electric scooter? What factors would you control?

   Mention route selection, payload, tyre pressure, ambient temperature, and battery SOC start point. Also note the need for repeatable conditions and data logging of speed, current, and voltage.

2. 6

   What is CAN bus, and how is it useful in vehicle testing?

   Describe CAN as a communication protocol between electronic control units. Explain that it lets you log real-time data like motor RPM, battery voltage, and fault codes without extra sensors.

3. 7

   What sensors or instruments would you use to measure vehicle speed, motor temperature, and battery current?

   Name common options: wheel speed sensor or GPS for speed, thermocouples or RTDs for temperature, and shunt or Hall-effect sensors for current. Mention data loggers for recording.

4. 8

   How do you ensure your test data is reliable and repeatable?

   Talk about calibration, controlled conditions, multiple runs, and documenting anomalies. Mention using the same test setup and checking for sensor drift.

Practical Scenarios and Troubleshooting

1. 9

   During a road test, the scooter suddenly loses power. How would you diagnose the issue?

   Suggest checking for fault codes, battery SOC and voltage, controller temperature, and loose connections. Describe a step-by-step approach from simple checks to deeper diagnostics.

2. 10

   You notice the battery pack gets unusually hot during fast charging. What could be the reasons and what would you do?

   Mention possible causes like high ambient temperature, cell imbalance, BMS issue, or charger fault. State that you would stop the test, record data, and escalate to the battery team.

3. 11

   How would you test whether a new brake system meets safety requirements?

   Describe braking distance tests at different speeds, wet and dry conditions, and repeated stops for fade. Mention comparing results to internal or regulatory standards.

4. 12

   A test vehicle shows lower than expected range. How would you investigate?

   Check tyre pressure, riding style, payload, and route. Then look at battery health, motor efficiency, and controller settings. Suggest comparing with a baseline vehicle.

Behavioural and HR Questions

1. 13

   Tell me about a time you worked in a team to solve a technical problem.

   Use a project or internship example. Highlight your role, how you communicated, and the outcome. Keep it concise and focused on teamwork.

2. 14

   Why do you want to work in the EV sector, and why our company?

   Show passion for clean mobility and awareness of the company's products or growth. Connect your skills to the role and mention a willingness to learn.

3. 15

   Describe a situation where you had to learn something new quickly.

   Pick a relevant example like learning a testing tool or software. Explain your approach and how you applied the new knowledge.

4. 16

   Are you comfortable with field testing, travel, and working in a fast-paced environment?

   Answer honestly and positively. Mention adaptability and readiness to do hands-on work, which is common in growing EV companies.