CWQAP 4.5

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Questions and Answers

What is the primary function of an actuator?

To eliminate the need for motion

To convert energy into torque (correct)

To generate energy independently

To store energy for later use

Which energy source does a hydraulic actuator primarily use?

Pressurized gas

Mechanical energy

Pressurized liquid (correct)

Electric current

What happens when hydraulic oil is pumped to the bottom side of the piston in a hydraulic actuator?

The actuator will malfunction

The valve will close

The piston will remain still

The valve will open (correct)

What is typically attached to the piston in a hydraulic piston actuator?

A valve stem Signup and view all the answers

Which of the following is NOT a type of actuator mentioned?

Mechanical actuator Signup and view all the answers

What role does the piston play in a hydraulic piston actuator?

It converts hydraulic pressure into motion for the valve stem. Signup and view all the answers

Which of the following best describes how a hydraulic piston actuator operates?

It employs pressurized liquid to move the piston, controlling valve positions. Signup and view all the answers

What happens to the valve when hydraulic oil is pumped to the top of the piston?

The valve will close completely. Signup and view all the answers

What type of motion can hydraulic actuators both introduce and prevent?

Linear or rotational motion. Signup and view all the answers

What is typically used as the pressurized liquid in a hydraulic actuator?

Oil Signup and view all the answers

In a hydraulic actuator, what is the primary force that moves the valve stem?

Pressure of the hydraulic oil Signup and view all the answers

Which of the following is NOT a characteristic of an actuator?

It can only introduce motion, not prevent it Signup and view all the answers

In a hydraulic piston actuator, what is the direct effect of pumping hydraulic oil to the bottom side of the piston?

The valve stem moves up Signup and view all the answers

What is the purpose of the cylinder assembly in a hydraulic valve actuator?

To house and guide the piston Signup and view all the answers

Which of the following statements BEST describes the primary function of a hydraulic piston actuator?

To convert energy into linear motion for valve control Signup and view all the answers

What mechanism does a hydraulic piston actuator use to control a valve stem?

A pressurized liquid Signup and view all the answers

When hydraulic oil is pumped to the bottom side of the piston in a hydraulic actuator, what is the resulting action?

The valve will open Signup and view all the answers

What happens when a hydraulic valve actuator's piston moves up and down?

It moves and positions the valve stem Signup and view all the answers

Which statement accurately describes the operation of a hydraulic actuator?

It employs both electric and pressure mechanisms Signup and view all the answers

What role does hydraulic oil play in a hydraulic piston actuator?

It serves as the pressurized medium for movement Signup and view all the answers

Study Notes

Actuator Principles

An actuator is a motor that converts energy into torque, controlling or moving a mechanism or system it's incorporated into.
Actuators can introduce motion as well as prevent it.
Actuators typically run on electric or pressure (hydraulic or pneumatic) energy.

Hydraulic Piston Actuator Principles

A hydraulic actuator uses pressurized liquid (usually oil) to position the valve stem.
A hydraulic valve actuator consists of a cylinder assembly attached to a valve.
Inside the cylinder, a piston moves up and down, attached to the valve stem.
When hydraulic oil is pumped to the top of the piston, the valve closes.
When hydraulic oil is pumped to the bottom side of the piston, the valve opens.

Actuator Principles

An actuator is a motor that converts energy into torque, controlling or moving a mechanism or system it's incorporated into.
Actuators can introduce motion as well as prevent it.
Actuators typically run on electric or pressure (hydraulic or pneumatic) energy.

Hydraulic Piston Actuator Principles

A hydraulic actuator uses pressurized liquid (usually oil) to position the valve stem.
A hydraulic valve actuator consists of a cylinder assembly attached to a valve.
Inside the cylinder, a piston moves up and down, attached to the valve stem.
When hydraulic oil is pumped to the top of the piston, the valve closes.
When hydraulic oil is pumped to the bottom side of the piston, the valve opens.

Actuator Principles

An actuator is a motor that converts energy into torque, controlling or moving a mechanism or system it's incorporated into.
Actuators can introduce motion as well as prevent it.
Actuators typically run on electric or pressure (hydraulic or pneumatic) energy.

Hydraulic Piston Actuator Principles

A hydraulic actuator uses pressurized liquid (usually oil) to position the valve stem.
A hydraulic valve actuator consists of a cylinder assembly attached to a valve.
Inside the cylinder, a piston moves up and down, attached to the valve stem.
When hydraulic oil is pumped to the top of the piston, the valve closes.
When hydraulic oil is pumped to the bottom side of the piston, the valve opens.

Actuator Principles

An actuator is a motor that converts energy into torque, controlling or moving a mechanism or system it's incorporated into.
Actuators can introduce motion as well as prevent it.
Actuators typically run on electric or pressure (hydraulic or pneumatic) energy.

Hydraulic Piston Actuator Principles

A hydraulic actuator uses pressurized liquid (usually oil) to position the valve stem.
A hydraulic valve actuator consists of a cylinder assembly attached to a valve.
Inside the cylinder, a piston moves up and down, attached to the valve stem.
When hydraulic oil is pumped to the top of the piston, the valve closes.
When hydraulic oil is pumped to the bottom side of the piston, the valve opens.