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This informative book is designed for students who want to pass the quiz with confidence. Packed with clear explanations and visual examples, it keeps you engaged while helping you learn faster and succeed.

1. Diesel

Diesel is a type of liquid fuel made from crude oil, used in diesel engines—which are common in trucks, buses, trains, farm equipment, and some cars.

  • A heavier, oilier fuel than gasoline (petrol).
  • Contains more energy per liter, which makes it more fuel-efficient for long distances or heavy loads.
  • Made through refining crude oil in a similar process as gasoline.
  • Diesel vehicles can be noisier and produce more NOx and soot.
  • Many new models use diesel particulate filters (DPF) and AdBlue to reduce emissions.
  • Diesel cars may not be allowed in some low-emission zones in cities.
  • How Diesel Works in an Engine:
    • Air is compressed inside the engine's cylinder.
    • Diesel is injected into the compressed air.
    • The heat from compression ignites the fuel (no spark plug needed).
    • This combustion pushes pistons, powering the vehicle.
Diesel

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