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Sona Comstar Interview Questions and Answers
39 Interview questions
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
Estimating cycle time involves analyzing drawing complexity, material requirements, and production processes.
Identify the type of drawing: Is it a simple sketch or a detailed technical drawing?
Assess the materials involved: Different materials may require different processing times.
Evaluate the production method: For example, CNC machining may have a different cycle time than manual fabrication.
Consider the skill ...
A lathe machine is classified based on its size, design, and functionality.
Classification based on size: mini lathe, bench lathe, engine lathe, turret lathe, etc.
Classification based on design: horizontal lathe, vertical lathe, center lathe, etc.
Classification based on functionality: CNC lathe, manual lathe, automatic lathe, etc.
Different types of hardness include scratch hardness, indentation hardness, and rebound hardness.
Scratch hardness is the resistance of a material to scratching or abrasion.
Indentation hardness is the resistance of a material to permanent deformation caused by a constant load.
Rebound hardness is the ability of a material to absorb energy and return it upon impact.
Examples include Mohs scale for scratch hardness, Ro...
The full form of HRC scale is Rockwell Hardness Scale C.
HRC stands for Rockwell Hardness Scale C.
It is a measure of the hardness of a material, commonly used in metallurgy.
The HRC scale is often used to determine the hardness of steel.
Higher HRC values indicate harder materials.
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)
Sona Comstar HR Interview Questions
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
VLOOKUP is a function in Excel used to search for a value in a table and return a corresponding value from another column.
VLOOKUP stands for 'Vertical Lookup'.
It is commonly used in Excel to search for a value in the leftmost column of a table and return a value in the same row from a specified column.
The function requires four arguments: the value to search for, the range of cells to search in, the column index n...
HLOOKUP is a function in Excel used to search for a value in the top row of a table and return a value in the same column from a specified row.
HLOOKUP stands for Horizontal Lookup.
It is used to search for a value in the top row of a table and return a value in the same column from a specified row.
Syntax: =HLOOKUP(lookup_value, table_array, row_index_num, [range_lookup])
Example: =HLOOKUP(100, A1:D4, 3, FALSE) will ...
A differential is the difference between two values or rates.
In mathematics, a differential is the result of subtracting one value from another.
In economics, a differential may refer to the difference in prices between two similar products.
In physics, a differential can represent the rate of change of a quantity over time.
Sona Comstar Interview Experiences
66 interviews found
Anonymous
I applied via Company Website and was interviewed before May 2021. There was 1 interview round.
(2 Questions)
- Q1. Machines Breakdowns, PLC Programming and Turobelshooting
- Q2. Machines Breakdowns , Plc Programming, vfd Drives,
Interview Preparation Tips
Selected
I appeared for an interview in Jan 2025.
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
(2 Questions)
- Q1. This were candidate's specific technical skills are evaluated
- Q2. Problem solving questions
(2 Questions)
- Q1. Focus on clearly articulating your relevant skills and experience
- Q2. Tailaring your response to the specific job requirements
SHARIK AHMAD
Selected
I applied via Walk-in and was interviewed in Dec 2024. There was 1 interview round.
(2 Questions)
- 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)
- Q2. Explain function of hydraulic and pneumatic system
Selected
I appeared for an interview in Aug 2024.
(5 Questions)
- Q1. Gate driver related questions
- 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
- 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.
- Q4. Loss calculations
- Q5. Simulink related question
Selected
I appeared for an interview in Apr 2025, where I was asked the following questions.
- Q1. Production develop
- Q2. Swift handling , Quality
- Q3. Team work , Hard working, production schedule
- Q4. Measuring instrument tool
- Q5. 5S , Poka yoke, TPM
Selected
I appeared for an interview in Aug 2024.
(1 Question)
- Q1. About your work experience details and personal details
(1 Question)
- Q1. Test your cost estimation skills, asked to estimate cycle time for given drawing
- Ans.
Estimating cycle time involves analyzing drawing complexity, material requirements, and production processes.
Identify the type of drawing: Is it a simple sketch or a detailed technical drawing?
Assess the materials involved: Different materials may require different processing times.
Evaluate the production method: For example, CNC machining may have a different cycle time than manual fabrication.
Consider the skill level...
Selected
I appeared for an interview in Mar 2025, where I was asked the following questions.
- Q1. Quality related issues
- Q2. 5s, Kaizan in house Rejection
- Ans.
5S and Kaizen are methodologies to improve workplace efficiency and reduce in-house rejection rates.
5S stands for Sort, Set in order, Shine, Standardize, and Sustain, which helps organize the workplace.
Kaizen focuses on continuous improvement, encouraging small, incremental changes to enhance processes.
Example of 5S: Sorting tools in a manufacturing area to eliminate unnecessary items, reducing time spent searching.
Exa...
Selected
(1 Question)
- Q1. What is Thermo calpal
- Ans.
Thermo calpal is a type of refractory material used in furnaces to withstand high temperatures.
Thermo calpal is a heat-resistant material used in furnace linings.
It is designed to withstand extreme temperatures and thermal shock.
Thermo calpal helps to maintain the structural integrity of the furnace during operation.
Short and crisp aptitude test
(2 Questions)
- Q1. What is a differential
- Q2. What is the benefit of shifting to electric from IC
- Ans.
Shifting to electric vehicles from internal combustion engines offers environmental benefits, cost savings, and improved performance.
Reduction in greenhouse gas emissions and air pollution
Lower operating costs due to cheaper electricity compared to gasoline
Less maintenance required as electric vehicles have fewer moving parts
Instant torque and smoother acceleration for better driving experience
Government incentives and...
Interview Preparation Tips
Selected
I appeared for an interview in Dec 2024.
(1 Question)
- Q1. Introduction and reason for leaving
- Ans.
I am a dedicated and experienced engineer with a passion for production processes. I am seeking new challenges and opportunities for growth.
I have been working as a Junior Engineer in the production department of XYZ Company for the past 2 years.
I am looking for a new role that offers more opportunities for learning and career advancement.
I am excited about the possibility of working with a new team and contributing my...
Interview Preparation Tips
Selected
I appeared for an interview in Nov 2024, where I was asked the following questions.
- Q1. Process related
- Q2. Experience on the job
- Ans.
I have extensive experience managing teams, focusing on collaboration, performance, and achieving goals effectively.
Led a team of 10 in a project that increased productivity by 20% through effective delegation and motivation.
Implemented weekly check-ins to address team concerns and foster open communication, resulting in a 15% improvement in team morale.
Developed training programs that enhanced team skills, leading to ...
Interview Preparation Tips
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The duration of Sona Comstar interview process can vary, but typically it takes about less than 2 weeks to complete.
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