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50+ DENSO Interview Questions and Answers

Updated 14 Dec 2024
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Q1. AC is an electrical appliance but sold in Electronics shop why so?

Ans.

AC is sold in Electronics shops because it is an electrical appliance that utilizes electronic components for its operation.

  • ACs use electronic components like capacitors, resistors, and microcontrollers for regulating temperature and controlling functions.

  • Electronics shops specialize in selling a wide range of electronic devices, including appliances like ACs.

  • ACs are considered as part of the electronics category due to their reliance on electronic technology for operation.

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Q2. How can you operate 4 different light bulbs under different trigger condition?

Ans.

To operate 4 different light bulbs under different trigger conditions, use a combination of switches, timers, sensors, and programming.

  • Use individual switches to control each light bulb independently.

  • Set up timers to automatically turn on/off specific light bulbs at scheduled times.

  • Utilize sensors such as motion sensors or light sensors to trigger certain light bulbs based on environmental conditions.

  • Program a microcontroller or smart home system to control the operation of a...read more

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Q3. How can you make a transistor if semiconductor material is given to you (by japanese panelist)

Ans.

To make a transistor, semiconductor material can be used to create a structure with three layers: emitter, base, and collector.

  • Start by doping the semiconductor material with impurities to create the different layers.

  • Use lithography and etching techniques to define the structure of the transistor.

  • Add metal contacts to the different layers to allow for electrical connections.

  • Test the transistor to ensure proper functionality and characteristics.

  • Examples: Silicon can be doped w...read more

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Q4. What is the list count of vernier caliper?

Ans.

The list count of vernier caliper is 20.

  • Vernier caliper has two scales - main scale and vernier scale.

  • The main scale has 10 divisions, each division is 1 mm.

  • The vernier scale has 9 divisions, each division is 0.9 mm.

  • The list count is the number of smallest divisions on the vernier scale that coincide with a division on the main scale.

  • In case of vernier caliper, the list count is 20.

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Q5. What is quality?why you do Mechanical Engineering?

Ans.

Quality is meeting or exceeding customer expectations through consistent and reliable products or services.

  • Quality is a measure of how well a product or service meets customer needs and expectations.

  • It involves ensuring that products or services are consistent and reliable.

  • Quality is achieved through a combination of processes, systems, and people.

  • Mechanical engineering is a field that focuses on designing and developing mechanical systems and products that meet quality stand...read more

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Q6. What is the difference between Quality Assurance (QA) and Quality Control (QC)?

Ans.

QA focuses on preventing defects in the production process, while QC focuses on identifying defects in the final product.

  • QA is process oriented, focusing on preventing defects by setting up processes and standards.

  • QC is product oriented, focusing on identifying defects in the final product through inspections and testing.

  • QA involves activities like process design, training, and audits to ensure quality standards are met.

  • QC involves activities like product testing, sampling, a...read more

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Q7. How much speed did you drive if coming by personel vehicle

Ans.

I always drive within the speed limit to ensure safety and compliance with traffic laws.

  • I always follow the speed limit and drive safely

  • I prioritize safety and compliance with traffic laws over speed

  • I never exceed the speed limit while driving

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Q8. What is 5s in the plant

Ans.

5S is a workplace organization method that uses a set of principles to create and maintain an organized, clean, and efficient work environment.

  • Sort - separate necessary items from unnecessary ones

  • Set in order - arrange necessary items in a logical manner

  • Shine - clean the work area and equipment

  • Standardize - establish procedures for maintaining the first three S's

  • Sustain - ensure that the first four S's are followed consistently over time

  • Example: organizing tools in a toolbox ...read more

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Q9. How to check true position on CMM

Ans.

True position on CMM can be checked using a combination of software and hardware tools.

  • Use a calibrated probe to measure the feature location

  • Compare the measured location with the nominal location

  • Calculate the deviation and compare it with the tolerance

  • Use software tools like GD&T to analyze the results

  • Ensure the CMM is calibrated and the probe is in good condition

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Q10. How to indicate fundamental deviation of hole in BIS system?

Ans.

Fundamental deviation of hole in BIS system can be indicated by specifying the tolerance zone and the position of the hole.

  • Specify the tolerance zone for the hole based on the BIS system standards.

  • Measure the actual position of the hole and compare it to the specified tolerance zone.

  • If the actual position of the hole falls outside the tolerance zone, indicate it as a fundamental deviation.

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Q11. What mechanism is used to convert linear motion of plunger to rotary motion of pointer in D.T.I?

Ans.

A rack and pinion mechanism is used to convert linear motion of plunger to rotary motion of pointer in D.T.I.

  • Rack and pinion mechanism consists of a gear (pinion) that meshes with a linear gear (rack) to convert linear motion into rotary motion.

  • As the plunger moves linearly, it engages with the rack which in turn rotates the pinion, causing the pointer to move.

  • This mechanism is commonly used in devices like dial indicators to accurately measure small distances.

  • The rack and pi...read more

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Q12. What is line balance

Ans.

Line balance refers to the equal distribution of work among different stations in a production line.

  • Line balance ensures that each station in a production line has a similar workload.

  • It helps in optimizing the efficiency and productivity of the production process.

  • Line balancing techniques involve analyzing the tasks, cycle times, and capacities of each station to achieve optimal balance.

  • An example of line balance is when a car assembly line is designed to ensure that each sta...read more

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Q13. How to decide torque

Ans.

Torque is decided based on the required force and the distance from the axis of rotation.

  • Determine the required force for the task

  • Calculate the distance from the axis of rotation

  • Use the formula T = F x d to calculate torque

  • Consider any external factors that may affect torque requirements

  • Choose a motor or engine with sufficient torque output

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Q14. What is the process of cooling in AC

Ans.

AC cooling process involves refrigerant absorbing heat from indoor air and releasing it outside.

  • Refrigerant absorbs heat from indoor air through evaporator coils

  • The warm refrigerant is then pumped to the condenser coils located outside

  • Condenser coils release the heat absorbed from indoor air to the outside environment

  • The refrigerant then goes back to the evaporator coils to repeat the cycle

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Q15. Are you abhle to understand what you read and write

Ans.

Yes, I am able to understand what I read and write.

  • I have good reading and writing skills in English.

  • I am able to comprehend technical manuals and instructions.

  • I can write reports and fill out forms accurately.

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Q16. How to do instrument selection

Ans.

Instrument selection involves identifying the appropriate tools and equipment for a specific task or process.

  • Identify the purpose of the instrument

  • Consider the accuracy and precision required

  • Evaluate the cost and availability

  • Ensure the instrument is compatible with other equipment

  • Consider the maintenance and calibration requirements

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Q17. How to improve shopfloor

Ans.

Improving shopfloor requires optimizing processes, training employees, and utilizing technology.

  • Analyze current processes and identify areas for improvement

  • Invest in employee training and development

  • Implement technology such as automation and data analytics

  • Regularly review and adjust processes to ensure efficiency

  • Encourage employee feedback and suggestions

  • Maintain a clean and organized workspace

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Q18. What is an advantage of mass production?

Ans.

Mass production allows for lower costs due to economies of scale.

  • Lower production costs per unit

  • Increased efficiency in production processes

  • Ability to meet high demand quickly

  • Consistent quality control measures

  • Examples: assembly line production in automotive industry, electronics manufacturing

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Q19. How to calculate gear strength ?

Ans.

Gear strength is calculated using the Lewis equation which takes into account the material properties and geometry of the gear.

  • The Lewis equation is used to calculate gear strength

  • The equation takes into account material properties and gear geometry

  • The equation is: Pd / (K * Y * J) = W

  • Where P is the power transmitted, d is the pitch diameter, K is the load distribution factor, Y is the Lewis form factor, J is the geometry factor, and W is the allowable bending stress

  • The allow...read more

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Q20. How to calculate wiping angle ?

Ans.

Wiping angle is calculated using the formula: wiping angle = 2 x arctan (wiper blade length / radius of curvature)

  • Wiping angle is the angle between the wiper blade and the windshield

  • It is important to calculate the wiping angle to ensure proper coverage of the windshield

  • The formula takes into account the length of the wiper blade and the radius of curvature of the windshield

  • The wiping angle can be adjusted by changing the position of the wiper arm on the windshield

  • Example: If...read more

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Q21. How to work with union

Ans.

Working with unions requires clear communication, respect, and a willingness to negotiate.

  • Establish open lines of communication with union representatives

  • Respect the collective bargaining agreement and union rules

  • Negotiate in good faith to find mutually beneficial solutions

  • Be prepared to compromise and find creative solutions

  • Stay informed about labor laws and regulations

  • Address any grievances or disputes promptly and fairly

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Q22. What Material use in TIG welding

Ans.

Various materials can be used in TIG welding, including stainless steel, aluminum, copper, nickel, titanium, and more.

  • Stainless steel

  • Aluminum

  • Copper

  • Nickel

  • Titanium

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Q23. What is lead time

Ans.

Lead time is the time it takes to complete a process from start to finish.

  • Lead time includes all the steps involved in a process, from planning to delivery.

  • It is an important metric for businesses to measure and improve efficiency.

  • Lead time can vary depending on the complexity of the process and the resources available.

  • For example, the lead time for manufacturing a car can be several months, while the lead time for delivering a pizza can be less than an hour.

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Q24. What is the concept of Kaizen?

Ans.

Kaizen is a Japanese business philosophy of continuous improvement involving all employees.

  • Kaizen focuses on making small, incremental changes to processes in order to improve efficiency and quality.

  • It involves all employees in the organization, from top management to frontline workers, in identifying and implementing improvements.

  • Kaizen emphasizes the importance of standardizing processes and then continuously improving them.

  • Examples of Kaizen practices include daily team me...read more

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Q25. What is the name of arthing 5 type

Ans.

The five types of earthing are: plate earthing, pipe earthing, rod earthing, strip earthing, and water pipe earthing.

  • Plate earthing involves burying a metal plate in the ground and connecting it to the electrical system.

  • Pipe earthing uses a metal pipe driven into the ground and connected to the electrical system.

  • Rod earthing utilizes a metal rod driven into the ground and connected to the electrical system.

  • Strip earthing involves burying a metal strip in the ground and connec...read more

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Q26. GD&T symbols & explanation

Ans.

GD&T symbols are used to specify geometric tolerances on engineering drawings.

  • GD&T stands for Geometric Dimensioning and Tolerancing

  • It is a system of symbols used to specify the allowable variation in form and size of features on a part

  • Examples of GD&T symbols include: flatness, perpendicularity, concentricity, and position

  • GD&T is important for ensuring parts are manufactured to the correct specifications and fit together properly

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Q27. What is FMEA

Ans.

FMEA stands for Failure Mode and Effects Analysis. It is a systematic approach to identify and prevent potential failures in a process or product.

  • FMEA is used to identify potential failures in a process or product and their effects on the system.

  • It involves analyzing the likelihood of failure, severity of the consequences, and the ability to detect the failure before it occurs.

  • FMEA is commonly used in industries such as automotive, aerospace, and healthcare to improve product...read more

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Q28. Siesa analysis of copper crimping is done how?

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Q29. What is the 5S methodology?

Ans.

5S methodology is a systematic approach to workplace organization and standardization.

  • Sort: Separate necessary items from unnecessary items and remove clutter.

  • Set in Order: Organize necessary items in a logical and efficient manner.

  • Shine: Clean and maintain the work area to ensure safety and efficiency.

  • Standardize: Establish and maintain standards for organization and cleanliness.

  • Sustain: Implement practices to sustain the improvements made through 5S.

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Q30. What is quality control?

Ans.

Quality control is a process used to ensure that products or services meet specified requirements and standards.

  • Quality control involves monitoring and inspecting products or services to identify defects or deviations from standards.

  • It includes implementing corrective actions to address any issues found during the inspection process.

  • Quality control aims to improve processes and prevent defects from occurring in the future.

  • Examples of quality control measures include statistic...read more

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Q31. What is continual improvement ?

Ans.

Continual improvement is the ongoing process of making small, incremental changes to processes, products, or services to achieve better results.

  • Involves identifying areas for improvement

  • Implementing changes

  • Monitoring the impact of changes

  • Evaluating results

  • Repeating the cycle to make further improvements

  • Examples: Kaizen in Lean manufacturing, Six Sigma methodology

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Q32. Problem solving examples

Ans.

I once resolved a conflict between two team members by facilitating a meeting and encouraging open communication.

  • Identified the root cause of the conflict

  • Scheduled a meeting with both team members

  • Encouraged open communication and active listening

  • Facilitated a discussion to find a mutually beneficial solution

  • Followed up with both team members to ensure the solution was working

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Q33. How to handle warranty parts

Ans.

Warranty parts should be properly documented, tracked, and analyzed to identify trends and improve product quality.

  • Create a system to track warranty parts including serial numbers, dates, and reasons for return

  • Analyze warranty parts data to identify common issues and trends

  • Work with suppliers to address recurring issues and improve product quality

  • Implement corrective actions based on warranty parts analysis to prevent future failures

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Q34. What is 5'S,5M,Kpi,?

Ans.

5S is a workplace organization method that uses a list of five Japanese words: seiri, seiton, seiso, seiketsu, and shitsuke. 5M is a method for improving workplace safety and efficiency. KPI stands for Key Performance Indicator.

  • 5S focuses on organizing the workplace to improve efficiency and reduce waste.

  • 5M stands for Man, Machine, Material, Method, and Measurement and is used to identify areas for improvement in workplace safety and efficiency.

  • KPIs are measurable values used...read more

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Q35. How many arthing in electric

Ans.

Earthing is an important safety measure in electrical systems.

  • Earthing provides a path for fault current to flow safely to the ground.

  • There are different types of earthing systems such as TN, TT, and IT.

  • The number of earthing points depends on the type of system and the size of the installation.

  • For example, a small domestic installation may have one earth rod, while a large industrial installation may have multiple earth pits.

  • Earthing is essential to protect people and equipm...read more

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Q36. tell us about ohm's law

Ans.

Ohm's law states that the current flowing through a conductor is directly proportional to the voltage across it, given constant resistance.

  • Ohm's law is represented by the formula V = IR, where V is voltage, I is current, and R is resistance.

  • It is named after German physicist Georg Simon Ohm.

  • It is commonly used in electrical engineering to calculate the relationship between voltage, current, and resistance.

  • Ohm's law is applicable to both DC (direct current) and AC (alternating...read more

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Q37. What is angle of projection

Ans.

Angle of projection is the angle at which an object is projected from the horizontal.

  • Angle of projection is crucial in determining the trajectory of a projectile.

  • It is measured from the horizontal axis to the direction of projection.

  • Different angles of projection result in different ranges and heights of the projectile.

  • For example, a 45-degree angle of projection will result in the maximum range for a projectile launched from the ground.

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Q38. Tell about joins, sql queries

Ans.

Joins in SQL are used to combine rows from two or more tables based on a related column between them.

  • Types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN

  • INNER JOIN returns rows when there is at least one match in both tables

  • LEFT JOIN returns all rows from the left table and the matched rows from the right table

  • RIGHT JOIN returns all rows from the right table and the matched rows from the left table

  • FULL JOIN returns rows when there is a match in one of the t...read more

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Q39. Tell about worst situation

Ans.

Being the only analyst on a critical project with tight deadlines and facing technical issues

  • Working on a project with tight deadlines

  • Facing technical issues without immediate support

  • Being the only analyst responsible for resolving the issues

  • Feeling overwhelmed and stressed

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Ans.

Creativity is the ability to think outside the box and come up with unique and innovative ideas.

  • It involves using imagination and originality

  • It can be applied in various fields such as art, music, writing, and problem-solving

  • It requires a willingness to take risks and experiment

  • Examples include creating a new product, designing a unique logo, or finding a creative solution to a complex problem

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Q41. How many types of transformer

Ans.

There are mainly two types of transformers: Step-up transformers and Step-down transformers.

  • Step-up transformers increase the voltage from primary to secondary winding.

  • Step-down transformers decrease the voltage from primary to secondary winding.

  • Examples include power transformers, distribution transformers, and instrument transformers.

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Q42. What is 5s ?

Ans.

5S is a workplace organization method that uses a list of five Japanese words: seiri, seiton, seiso, seiketsu, and shitsuke.

  • Sort (Seiri) - Separate needed tools, materials, and instructions from unneeded ones.

  • Set in order (Seiton) - Arrange the needed items so that they are easy to use.

  • Shine (Seiso) - Clean and inspect the work area and equipment regularly.

  • Standardize (Seiketsu) - Maintain and standardize the first three Ss.

  • Sustain (Shitsuke) - Ensure that the 5S system is ma...read more

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Q43. What is poke yoke ?

Ans.

Poke yoke is a Japanese term for mistake-proofing or error prevention in manufacturing processes.

  • Poke yoke aims to prevent errors by designing processes in a way that makes it impossible for mistakes to occur.

  • Examples of poke yoke include using sensors to detect errors in production lines or designing products with features that prevent incorrect assembly.

  • It helps in improving quality, reducing defects, and increasing efficiency in manufacturing operations.

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Q44. What is Tool angle

Ans.

Tool angle refers to the angle between the cutting edge of a tool and the workpiece being machined.

  • Tool angle affects the cutting forces, chip formation, and surface finish of the machined part.

  • Different types of tools have different optimal tool angles for specific machining operations.

  • Examples of tool angles include rake angle, clearance angle, and cutting edge angle.

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Q45. What is sprue bush

Ans.

A sprue bush is a component used in injection molding to direct molten plastic into the mold cavity.

  • Sprue bush is typically made of hardened steel to withstand high temperatures and pressure.

  • It is designed to evenly distribute the molten plastic to prevent defects in the final product.

  • The size and shape of the sprue bush can affect the flow of plastic and the overall quality of the molded part.

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Q46. How to read a book

Ans.

Reading a book involves active engagement with the text and requires focus and concentration.

  • Choose a quiet and comfortable environment to read in

  • Set aside dedicated time for reading

  • Engage with the text by taking notes or highlighting important passages

  • Read actively by asking questions and making connections to your own experiences

  • Take breaks to avoid eye strain and mental fatigue

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Q47. 8D analysis steps

Ans.

8D analysis is a problem-solving method used to identify, correct, and prevent recurring problems.

  • Define the problem

  • Form a team

  • Containment actions

  • Root cause analysis

  • Corrective actions

  • Implement permanent corrective actions

  • Prevent recurrence

  • Recognize team efforts

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Q48. 7QC tools steps

Ans.

The 7QC tools are a set of quality control tools used for problem-solving and process improvement.

  • Identify the problem or process to be improved

  • Collect data related to the problem

  • Display data visually using tools like histograms or scatter plots

  • Analyze the data to identify root causes of the problem

  • Brainstorm and implement solutions

  • Monitor the results of the implemented solutions

  • Standardize the process to prevent recurrence of the problem

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Q49. Different of file and quality

Ans.

File refers to a document or data stored on a computer, while quality refers to the standard of excellence or fitness for purpose.

  • File is a digital record or document, while quality is a measure of how well something meets a standard or requirement.

  • File can be saved, edited, and shared, while quality is a characteristic that cannot be changed once established.

  • Examples of files include documents, images, videos, and audio recordings, while examples of quality include durabilit...read more

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Q50. Structure and working of engine

Ans.

The engine is the main component of a vehicle that converts fuel into mechanical energy to power the vehicle.

  • Engines can be classified into different types such as internal combustion engines, diesel engines, and electric motors.

  • The structure of an engine typically includes components such as cylinders, pistons, crankshaft, and camshaft.

  • The working of an engine involves the intake of air and fuel mixture, compression, combustion, and exhaust of gases.

  • Regular maintenance and q...read more

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Q51. Starter motor function?

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Q52. Direct f2f with HR.

Ans.

Answering a question about direct f2f with HR

  • Direct face-to-face communication with HR is important for effective communication

  • It allows for a more personal and human connection

  • It can help to clarify any misunderstandings or concerns

  • Examples: discussing job responsibilities, negotiating salary, addressing workplace issues

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Q53. What 5s in area

Ans.

5S is a workplace organization method that uses a list of five Japanese words: seiri, seiton, seiso, seiketsu, and shitsuke.

  • Sort (Seiri) - Separate needed tools, materials, and instructions from unneeded ones.

  • Set in order (Seiton) - Arrange items in a neat and efficient manner for easy access.

  • Shine (Seiso) - Clean and inspect the work area regularly to maintain cleanliness and order.

  • Standardize (Seiketsu) - Establish standards and procedures for maintaining the first three S'...read more

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