UNIT 4 HYDRAULIC ACTUATOR

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Open Ended

What prior knowledge do you have about how hydraulic actuators work or where they might be used?

Multiple Choice

Which of the following best describes the significance of hydraulic actuators in industrial systems?

• They are used for decorative purposes only.

• They convert hydraulic energy into mechanical motion, enabling automation and control.

• They are primarily used for cooling systems.

• They function only as storage devices.

Open Ended

Explain how the selection of a hydraulic actuator depends on the type and direction of load to be moved.

Multiple Choice

What are the two types of motion that hydraulic actuators can produce?

• Linear and rotary motion

• Oscillating and vibrating motion

• Translational and helical motion

• Circular and elliptical motion

Multiple Select

Which of the following statements about hydraulic double acting piston cylinders are correct?

• They are used to move loads linearly.

• They allow fluid under pressure to be applied to either side of the piston.

• They are always single-acting.

• A four-way directional control valve is used to control their operation.

Fill in the Blank

A hydraulic cylinder is also known as a ___ actuator.

Open Ended

Describe the main components of a linear actuator as shown in the diagram.

Multiple Choice

Which type of actuator is commonly known as a hydraulic motor and is used to move a load in a rotational direction?

• Rotary actuator

• Linear actuator

• Angular actuator

• Solenoid actuator

Multiple Choice

Which of the following statements about angular actuators is correct?

• They move loads in a full 360-degree rotation.

• They are commonly used in industrial applications.

• They move loads at angles less than 360 degrees.

• They are a type of linear actuator.

Fill in the Blank

The actuator that contains two pistons and piston rod assemblies is called a ___-acting piston-type actuating cylinder.

Fill in the Blank

When fluid under pressure is directed into the cylinder through ports B and C, the two pistons move ___ .

Open Ended

Explain the working principle of a three-port, double-acting piston-type actuating cylinder as described in the slides.

Open Ended

Explain why proper installation of a hydraulic cylinder is important for its application and performance.

Multiple Choice

Which of the following mounting types is NOT shown in the diagram for proper installation of a cylinder?

• Foot

• Thread

• Clevis

• Swivel flange centre

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Multiple Choice

What could be a possible reason if a hydraulic cylinder extends but does not retract?

• Oil is not returning freely to the other side

• The piston rod is bent

• The cylinder is overfilled with oil

• The mounting bolts are loose

Fill in the Blank

Failure of hydraulic actuators may be caused by leaking at ring and ___

Multiple Select

Which of the following are included in the basic inspection and maintenance of hydraulic cylinders?

• Mounting

• Rod wiper

• Buckling

• All of the above

Open Ended

Reflecting on today's lesson about hydraulic actuators, what is one aspect you found most interesting or would like to learn more about?

Multiple Choice

Based on the outline provided, which of the following is NOT a main topic covered in Unit 4: Hydraulic Actuator?

• Introduction

• Types of Hydraulic Actuator and Function

• Hydraulic Fluid Properties

• Maintenance, Repair and Troubleshooting