Daimler India Commercial Vehicles Mechanical Technician Interview Questions and Answers

An engine is the power source of a vehicle that converts fuel into mechanical energy.

• An engine is a complex machine that converts fuel into mechanical energy to power a vehicle.

• It consists of various components such as cylinders, pistons, crankshaft, and camshaft.

• There are different types of engines such as gasoline, diesel, electric, and hybrid.

• Regular maintenance and proper care are essential for the engine's longevi

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

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

Current pollution standards vary by country, focusing on air, water, and soil quality to protect public health and the environment.

• The U.S. Environmental Protection Agency (EPA) sets National Ambient Air Quality Standards (NAAQS) for pollutants like PM2.5 and ozone.

• The European Union has established directives for air quality, including limits on nitrogen dioxide (NO2) and particulate matter (PM10).

• Water quality standa...read more

Automobiles are complex machines designed for transportation, while mechanical systems encompass a broader range of machinery and devices.

• Automobiles are specifically designed for transportation, e.g., cars, trucks.

• Mechanical systems include a wide range of devices, e.g., engines, gears.

• Automobiles integrate various mechanical components like engines and transmissions.

• Mechanical engineering principles apply to both fie...read more

Gear boxes are mechanical devices used to increase or decrease the speed or torque of a motor.

• Types include manual, automatic, CVT, DCT, and sequential gearboxes

• Manual gearboxes require the driver to manually shift gears using a clutch pedal

• Automatic gearboxes shift gears automatically without the need for manual input

• CVT (Continuously Variable Transmission) provides seamless gear shifts without distinct gear ratios

• DCT...read more

Hydrometer is used to check battery water specific gravity

• Hydrometer is a device used to measure the specific gravity of battery water

• It helps determine the state of charge and health of the battery

• Specific gravity is a measure of the electrolyte concentration in the battery

• Hydrometers are commonly used in automotive and marine batteries