Sona Comstar Interview Questions, Process, and Tips

I have studied BE meachanical engineering
Selvam college of technology in namakkal and .I have 2 years experience on quality assurance. I would like to apply for this job and I can work well here
Thank you

Diversity equality and inclusion:
How to create a welcoming work place for all employees.
Draining and development:
How to identify skill gaps and provide training to help employees perform their roles

Q1. This were candidate's specific technical skills are evaluated
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Q2. Problem solving questions
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Q1. Focus on clearly articulating your relevant skills and experience
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Q2. Tailaring your response to the specific job requirements
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Q1. If single phase power is 220 volts, why is 3 phase 440 volts and not 660?
Ans. 
3 phase power is 440 volts instead of 660 volts due to the configuration of the phases and the relationship between them.
• 3 phase power consists of three separate voltages that are 120 degrees out of phase with each other

• The line-to-line voltage in a 3 phase system is √3 times the phase voltage

• In a 3 phase system, the line-to-line voltage is 440 volts (220 volts * √3)
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Q2. Explain function of hydraulic and pneumatic system
Ans. 
Hydraulic systems use liquid to transmit power, while pneumatic systems use gas.
• Hydraulic systems use oil or water as the fluid to transmit power

• Pneumatic systems use air or other gases as the fluid to transmit power

• Hydraulic systems are typically used in heavy machinery like excavators and cranes

• Pneumatic systems are commonly found in applications like air brakes in vehicles
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Q1. Gate driver related questions
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Q2. What are the criteria for selecting a MOSFET?
Ans. 
Criteria for selecting a MOSFET include voltage rating, current rating, switching speed, and package type.
• Voltage rating should be higher than the maximum voltage in the circuit

• Current rating should be higher than the maximum current in the circuit

• Switching speed should meet the requirements of the application

• Package type should be compatible with the PCB layout and assembly process
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Q3. Capacitor types
Ans. 
Capacitor types include electrolytic, ceramic, tantalum, and film capacitors.
• Electrolytic capacitors are polarized and have high capacitance values.

• Ceramic capacitors are non-polarized and have a wide range of capacitance values.

• Tantalum capacitors are polarized and have high stability and reliability.

• Film capacitors are non-polarized and have high precision and low leakage.
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Q4. Loss calculations
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Q5. Simulink related question
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Q1. About your work experience details and personal details
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Q1. Test your cost estimation skills, asked to estimate cycle time for given drawing
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