Red Seal Automotive Service Technician Practice Exam

How does a strut differ from a shock absorber?

1. A strut provides structural support, while a shock merely dampens motion

2. They serve the same purpose

3. A shock absorber is more durable than a strut

4. A strut is found in manual vehicles only

The correct answer is: A strut provides structural support, while a shock merely dampens motion

The distinction between a strut and a shock absorber is primarily function-based, which is encapsulated in the statement that a strut provides structural support, while a shock absorber primarily dampens motion. A strut is an integral part of the vehicle's suspension system, playing a dual role. It functions as a suspension component that helps to absorb shock from road irregularities, but it also supports the vehicle's weight and contributes to the structural integrity of the suspension system. Essentially, struts are designed to maintain the geometry of the vehicle's suspension, allowing for consistent handling and stability during driving. On the other hand, a shock absorber's primary role is to control the oscillation of the springs by dissipating energy and controlling the rebound during and after a bump. While shock absorbers are critical for ride quality and vehicle control, they do not provide structural support to the suspension system in the same way that struts do. This understanding underlines why the correct choice emphasizes the dual functionality of struts compared to the more singular role of shock absorbers.