Which of the following is NOT a type of basic mechanism?

Hydraulic systems are classified as complex mechanisms rather than basic ones. Basic mechanisms typically include simple machines such as gears, pulleys, and inclined planes. These simple machines serve foundational roles in mechanical systems by transmitting force and motion in straightforward ways.

Gears are used for transmitting torque and rotational motion efficiently, while pulleys reduce the effort needed to lift objects by changing the direction of force. Inclined planes help in elevating objects with reduced exertion. In contrast, hydraulic systems involve fluid mechanics and often comprise multiple components working together, which makes them more on the complexity spectrum of mechanical systems, often used for applications requiring force multiplication through hydraulic pressure, rather than the simple mechanical advantages provided by basic mechanisms.