Volkswagen Mechanical Quality Engineer Interview Questions and Answers

Q1. What is DOC & mufflers
Ans. 
DOC stands for Diesel Oxidation Catalyst, a device used to reduce harmful emissions in diesel engines. Mufflers are components that reduce noise produced by the engine.
• DOC is a device used in diesel engines to convert harmful pollutants into less harmful substances.

• Mufflers are components in the exhaust system that reduce noise produced by the engine.

• DOCs are commonly used in vehicles to meet emission standards.

• Muffler...read more
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Q2. What is starting & presser pipe
Ans. 
Starting & presser pipe is a term used in mechanical engineering to refer to pipes used for starting and pressurizing systems.
• Starting pipe is used to supply initial fluid or gas to start a system

• Presser pipe is used to maintain pressure in a system

• Examples include starting and presser pipes in hydraulic systems or pneumatic systems
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Q1. What is the capacity of diesel and petrol
Ans. 
Diesel has higher energy density than petrol, resulting in better fuel efficiency.
• Diesel has a higher energy density than petrol, meaning it can provide more energy per unit volume.

• Petrol is more volatile and burns faster than diesel.

• The capacity of diesel and petrol tanks in vehicles can vary depending on the size of the vehicle and its fuel efficiency.

• For example, a typical car may have a petrol tank capacity of arou...read more
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Q2. Difference b/w petrol engine & diesel engine
Ans. 
Petrol engines use spark ignition, while diesel engines use compression ignition.
• Petrol engines use a spark plug to ignite the fuel-air mixture, while diesel engines rely on compression to ignite the fuel.

• Petrol engines are lighter and more responsive, while diesel engines are more fuel-efficient and have higher torque.

• Petrol engines are more common in cars and motorcycles, while diesel engines are often used in trucks
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Q3. What is meant by LNTD
Ans. 
LNTD stands for Logarithmic Mean Temperature Difference.
• LNTD is a term used in heat transfer calculations to determine the overall temperature difference between two fluids in a heat exchanger.

• It is calculated using the formula LNTD = (ΔT1 - ΔT2) / ln(ΔT1 / ΔT2), where ΔT1 and ΔT2 are the temperature differences at the two ends of the heat exchanger.

• LNTD is important in designing efficient heat exchangers to maximize h...read more
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Q1. What about your work experience
Ans. 7 year experience in automobile industry
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Q2. What about your qualifications
Ans. I have completed my automobile diploma in diesel machanic
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Q1. Where do you leave
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Q1. What is the meaning of automobile
Ans. 
An automobile is a vehicle designed for transportation that is powered by an internal combustion engine or electric motor.
• Automobiles are commonly used for personal transportation, as well as for commercial purposes such as delivery services or transportation of goods.

• They typically have four wheels and are designed to carry passengers, although some vehicles like trucks and buses are also considered automobiles.

• Exampl...read more
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Q1. What about your self
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Q1. Technician said
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Q2. Service technicians
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Q3. Service advisor
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Q4. Floor supervisor
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Q5. Service final quality inspection
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Q6. Technician completed
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Easy interview , very friendly employee.

Q1. About your information
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Q2. Technical questions
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Q1. Practical instutes
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Yes i want aptitude test plz share on me email
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Q1. Mechanical engineering Quality assurance
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Q2. Which type of ic engine
Ans. 
Internal combustion engines are classified into two main types: spark ignition (SI) engines and compression ignition (CI) engines.
• Spark ignition (SI) engines use a spark plug to ignite the fuel-air mixture, commonly found in gasoline engines.

• Compression ignition (CI) engines rely on the heat generated by compressing the air in the cylinder to ignite the fuel, commonly found in diesel engines.

• Each type of engine has its...read more
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Q3. Instrumental calibration
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Q4. How do you use instrument
Ans. 
Instruments are used in various ways in mechanical engineering, such as for measuring, testing, and analyzing different parameters.
• Instruments are used for measuring various parameters like temperature, pressure, flow rate, etc.

• Instruments are used for testing the performance of mechanical systems and components.

• Instruments are used for analyzing data and making informed decisions based on the results.

• Examples include ...read more
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Q5. What about a quality control
Ans. 
Quality control is essential in ensuring products meet standards and specifications.
• Quality control involves monitoring and testing products to ensure they meet specified standards.

• It helps identify defects or issues early in the production process.

• Quality control can involve inspections, testing, and audits to ensure consistency and reliability.

• Examples include checking dimensions of a part, testing the strength of a
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