BMW Mechanical Engineer Interview Questions and Answers

A diesel generator works by converting diesel fuel into mechanical energy which is then converted into electrical energy.

• Diesel fuel is injected into the combustion chamber where it ignites and creates high pressure gases that push the piston down, creating mechanical energy.

• The mechanical energy is then converted into electrical energy through the use of an alternator.

• The alternator uses a magnetic field and a conduct...read more

A diesel engine works by compressing air in the cylinder, which heats up and ignites the fuel injected into the cylinder.

• Air is drawn into the cylinder and compressed by the piston

• The compressed air heats up and ignites the fuel injected into the cylinder

• The explosion pushes the piston down, which turns the crankshaft and powers the engine

• Diesel engines are more efficient than gasoline engines because they compress the...read more

A train doesn't need a differential because its wheels are fixed to the same axle and rotate at the same speed.

• Train wheels are fixed to the same axle

• Wheels rotate at the same speed

• Differential is used in vehicles with wheels that rotate at different speeds

• Differential allows for smooth turning

Petrol engines have lower compression ratios compared to diesel engines.

• Petrol engines have lower compression ratios to prevent knocking or detonation.

• Diesel engines have higher compression ratios to ignite the fuel without spark plugs.

• Higher compression ratios in diesel engines result in better fuel efficiency and torque.

• Petrol engines require lower compression ratios to accommodate the lower octane rating of petrol f...read more

I am a mechanical engineer with expertise in designing and analyzing mechanical systems.

• I have a Bachelor's degree in Mechanical Engineering from XYZ University.

• I have worked as a mechanical engineer for 5 years at ABC Company, where I designed and optimized mechanical components for various projects.

• I am proficient in CAD software such as AutoCAD and SolidWorks, and have experience in conducting simulations and stress...read more

Petrol engines use spark ignition while diesel engines use compression ignition.

• Petrol engines use spark plugs to ignite the fuel-air mixture, while diesel engines rely on compression to ignite the fuel.

• Petrol engines have a higher power-to-weight ratio compared to diesel engines.

• Diesel engines are more fuel-efficient than petrol engines.

• Petrol engines are typically used in cars, motorcycles, and small vehicles, while ...read more

Vernier calipers and micrometers are precision measuring tools used in mechanical engineering.

• Vernier calipers are used to measure dimensions with high accuracy, typically up to 0.02 mm.

• Micrometers are used for even more precise measurements, typically up to 0.001 mm.

• Both tools are commonly used in mechanical engineering for dimensional inspection and quality control.

• Vernier calipers have a sliding scale and a main sca...read more

I chose mechanical engineering because of my fascination with steam power and its applications.

• I have always been intrigued by the power and versatility of steam as a source of energy.

• Steam technology has a long history and has played a crucial role in the development of various industries.

• I find the principles of thermodynamics and fluid mechanics involved in steam systems to be intellectually stimulating.

• Working with...read more

Excel is a spreadsheet software used for organizing, analyzing and manipulating data.

• Excel allows users to create tables, charts, and graphs to represent data visually.

• It can perform complex calculations and analysis on large sets of data.

• Excel can be used for budgeting, financial analysis, project management, and more.

• It also has features for data validation, sorting, filtering, and conditional formatting.

• Excel can im...read more

Motivating workers is crucial for productivity and job satisfaction.

• Recognize and appreciate their efforts

• Provide opportunities for growth and development

• Create a positive work environment

• Set clear goals and expectations

• Offer incentives and rewards

• Encourage teamwork and collaboration

DWM stands for Desktop Window Manager, a Windows service responsible for managing visual effects and rendering of windows.

• DWM is responsible for rendering the desktop, windows, and all associated visual effects.

• It uses hardware acceleration to improve performance and reduce CPU usage.

• DWM was introduced in Windows Vista and is still used in current versions of Windows.

• Examples of visual effects managed by DWM include Ae