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. Jack

A jack is a mechanical lifting device used to raise a vehicle off the ground, usually so you can change a tire, inspect the underside, or perform basic repairs. It’s a crucial emergency tool found in most cars—especially alongside the spare tire.

  • Lifts part of the vehicle by supporting it under a strong point (usually near the wheel).
  • Allows you to remove and replace a wheel safely.
  • Works by using manual force, hydraulics, or screw mechanisms.
  • Common Types of Jacks: Scissor jack - Compact, hand-operated jack found in many cars, Hydraulic bottle jack - Small, powerful, uses hydraulic pressure (common with trucks/SUVs), Floor jack (trolley jack) - Roll-around shop jack with a handle—easy to use but not portable, Hi-lift jack - Tall, heavy-duty jack for off-road vehicles.
  • How to Use a Jack Safely:
    • Park on level ground and turn on hazard lights.
    • Apply the parking brake and block the wheels (to prevent rolling).
    • Locate the jack point under the car (check your owner’s manual).
    • Place the jack and raise the car slowly.
    • Never put any part of your body under the car without using jack stands.
Jack

Changing a tire of a Citroën Xsara with a jack to lift the vehicle. © Wikimedia.org/Santeri Viinamäki, CC BY-SA