Sterling Gtake E-Mobility Interview Questions, Process, and Tips

Q1. Tell me about yourself
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Q2. Question asked form resume only
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Q3. What is mosfet how battery works
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A MOSFET is a type of transistor used in electronic devices to control the flow of electrical current. A battery works by converting chemical energy into electrical energy.
• MOSFET stands for Metal-Oxide-Semiconductor Field-Effect Transistor.

• It is commonly used in amplifiers, switches, and digital circuits.

• A battery works by converting chemical energy stored in its electrodes into electrical energy through a chemical rea...read more
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Q1. Overall equipment effectiveness
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Overall Equipment Effectiveness (OEE) measures the efficiency of manufacturing processes by evaluating availability, performance, and quality.
• OEE = Availability x Performance x Quality; for example, if a machine runs 80% of the time, produces at 90% speed, and has 95% quality, OEE = 0.8 x 0.9 x 0.95.

• Availability considers downtime; if a machine is down for maintenance, it affects OEE.

• Performance measures speed; if a ma...read more
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Q2. Communication protocols
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Q3. HI-POTS testing,IR test, dynamic testing, Burn-in prosess, software flashing
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Q4. Knowledge about motor
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Q5. Knowledge about EV vehicle sensor like encoder,ABZ &Hall sensor,resolver
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Q6. MTBF and MTTR
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Q7. Manpower handling and rejection handling
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Q8. Knowledge about SAP opretion
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Q9. Knowledge about line balancing
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Q10. Knowledge about new setup installation and maintenance and troubleshooting of EOL testing machine
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Q11. Knowledge about pmsm motor and hub motors
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Q12. Knowledge about wiring harness and electrical connection
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Q1. Explain PMSM motor
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PMSM motor stands for Permanent Magnet Synchronous Motor, which is a type of AC motor that uses permanent magnets in the rotor.
• PMSM motors have high efficiency and power density.

• They are commonly used in applications requiring high precision and control, such as robotics and electric vehicles.

• PMSM motors have a sinusoidal back EMF waveform, which simplifies control algorithms.

• They do not require a rotor position sensor...read more
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Q2. Explain VSI with Diagram
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VSI stands for Voltage Source Inverter, a type of power electronics device used to convert DC power to AC power.
• VSI converts DC power to AC power by switching the voltage on and off at high frequency.

• It consists of power semiconductor devices like IGBTs or MOSFETs.

• VSI is commonly used in variable frequency drives, solar inverters, and UPS systems.

• The output waveform of VSI can be controlled by adjusting the switching f
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Formal aptitude questions

Q1. Basic questions
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Q1. Department oriented
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