Cummins Junior Engineer Trainee Interview Questions and Answers

Two stroke and four stroke engines differ in their working cycles and efficiency.

• Two stroke engines complete a power cycle in two strokes of the piston, while four stroke engines complete it in four strokes.

• Two stroke engines have a simpler design and are lighter, but are less fuel efficient and produce more emissions.

• Four stroke engines have separate intake, compression, power, and exhaust strokes, resulting in better...read more

Diesel engines and petrol engines differ in fuel type, ignition process, compression ratio, and efficiency.

• Fuel type: Diesel engines use diesel fuel, while petrol engines use gasoline.

• Ignition process: Diesel engines use compression ignition, while petrol engines use spark ignition.

• Compression ratio: Diesel engines have higher compression ratios than petrol engines.

• Efficiency: Diesel engines are generally more fuel-eff...read more

A turbocharger is a device that increases the efficiency and power output of an internal combustion engine.

• A turbocharger uses exhaust gases to drive a turbine, which in turn drives a compressor to force more air into the engine.

• By increasing the amount of air entering the engine, a turbocharger allows more fuel to be burned, resulting in increased power.

• Turbochargers are commonly used in diesel engines and high-perfor...read more