From the large machines you see roaming about a construction site to the brakes in your vehicle, hydraulics are at work everywhere. Their agility and strength are truly astounding. Just about everywhere you turn, you are going to see something that uses this technology. To help you learn more about where hydraulic systems are commonly used, check out these three examples. 1. Car Brakes When you drive in your car, you just assume it is going to stop and start when you want it to.