Hydraulic Actuator Quiz

What is the function of a linear actuator?

• Control the operation of hydraulic systems

• Move the load at certain angle less than 360

• Move the load linearly

• Move the load in rotation direction

What type of valve is normally used to control the operation of a double-acting piston-type actuating cylinder?

• Check valve

• Gate valve

• Butterfly valve

• Four-way directional control valve

What is the purpose of a rod wiper in a hydraulic cylinder?

• To prevent leakage at ring and gasket

• To protect the piston rod from contaminants

• To avoid side loading to cylinder

• To maintain proper alignment and load movement

What may cause failure of hydraulic actuators related to mounting?

What should be inspected for maintenance of a hydraulic cylinder related to load alignment?

What is a common sign of friction that may indicate maintenance is needed for a hydraulic cylinder?

• Jerky movement

• Leakage

• Buckling

• Cushion effect

What should be inspected for maintenance of a hydraulic motor related to noise and vibration level?

• Pressure

• Drain port

• Leakage

• Slide title 29

What is the purpose of a four-way directional control valve in a hydraulic system?

• To allow displaced fluid to flow from the opposite end of the cylinder

• To move the load linearly

• To direct fluid under pressure to either end of the cylinder

• To control the operation of hydraulic systems

What is the purpose of a double-acting piston-type actuating cylinder with two pistons and piston rod assemblies?

• To move two mechanisms at the same time

• To protect the piston rod from contaminants

• To prevent leakage at ring and gasket

• To avoid side loading to cylinder

What is the function of a check valve in a hydraulic system?

• To allow displaced fluid to flow from the opposite end of the cylinder

• To move the load linearly

• To direct fluid under pressure to either end of the cylinder

• To prevent backflow of fluid