Introduction to Hydraulics Flashcards
Define work.
Force applied over a distance.
Work = Force x Distance.
Define power.
The rate at which work is done.
Power = Force x Distance / Time.
Define pressure.
The force on a unit of area.
Why is pressure transmitted almost instantly through hydraulic fluid?
Because hydraulic fluid is almost incompressible.
Why does a cylinder have a lower load capacity when it retracts as opposed to when it extends?
Because there is less surface area on the retraction side due to the cylinder rod.
How can you increase the force exerted by a cylinder of any given size?
By increasing the pressure.
To increase the load capacity at a given pressure would you use a large or small cylinder?
Large.
Does a pump produce pressure, flow or both?
Flow.
Which moves faster at a given flow rate, a small or large cylinder?
Small diameter cylinder.
How does a reduction in pipe size effect pressure?
Decreases the pressure.
How does a decrease in pipe size effect velocity?
Increases the velocity.
Which flow is the most efficient for transmitting power, laminar or turbulent?
Laminar.
When the velocity of fluid increases, does the pressure increase or decrease?
Decreases.
What produces pressure?
Resistance to flow.
How does pressure effect the output of a cylinder?
It effects force.
