Mahindra & Mahindra Mechanical Engineer Interview Questions and Answers

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 fuel.

• Lower compression ratios in petrol engines allow for s...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 diesel engines are commonly found in trucks, buses, and he...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 scale, while micrometers have a screw mechanism for measureme...read more

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 conductor to generate an electrical current.

• The electrical curren...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

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 import and export data from other software applications.

• Exam...read more