Book

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. Semi-trailer truck

A semi-trailer truck (also called an articulated lorry, tractor-trailer, or simply semi) is a large freight vehicle consisting of two main parts: . Tractor unit – the front part with the engine, driver’s cab, and the coupling device (fifth wheel). Semi-trailer – the rear load-carrying unit without a front axle, supported at the front by the tractor unit and at the rear by its own wheels.

  • Often 16–18 meters long in standard form, but can be longer with special permits.
  • Long-distance cargo transport (containers, bulk goods, refrigerated loads, etc.).
  • The pivot joint allows the trailer to turn independently from the tractor, giving better maneuverability than a rigid truck of the same length.
  • Requires a heavy vehicle license in most countries.
  • Dangers: wide turning radius, longer stopping distance, blind spots.
Semi-trailer truck

A Mercedes semi-trailer truck. (Regensburg, Germany) © Wikimedia.org/High Contrast, CC BY-DE

Recess