Which of the following is an example of a typical robot actuator?

• A. Hydraulic cylinders
• B. Pneumatic cylinders
• C. Servo motors
• D. All of the above are typical robot actuators

Answer: (D)

Actuators are devices that turn energy into motion or force in a robot. Hydraulic cylinders use pressurized fluid to produce large linear forces, making them ideal for heavy lifting. Pneumatic cylinders use compressed air for linear motion that’s fast and simple, good for quick, light to moderate loads. Servo motors are electric motors paired with feedback that allow precise control of position, speed, and torque, which is essential for accurate manipulation and rotation. In real robots, you’ll see a mix of these types because each offers different advantages for speed, force, and precision. Because all three are common actuator types, the best answer is that all of the above are typical robot actuators.