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Flashcards in Hydraulics Deck (11)
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1
Q

What is the key property of liquids?

A

They are virtually incompressible

2
Q

What does virtually incompressible mean?

A

You can’t squash them

Their volumes and densities stay the same

3
Q

What can you do as a result of liquids being incompressible and able to flow?

A

Apply a force at one point in the liquid and it will be transmitted to other points in the liquid

4
Q

What does the balloon with holes in example show?

A

Thé force applied to water at the top of the balloon is transmitted to the water in other parts of the balloon

Pressure can be transmitted throughout a liquid

5
Q

Hoe is pressure in a liquid transmitted?

A

Pressure in a liquid is transmitted equally in all directions

6
Q

What is pressure measured in?

A

Pa

Pascals

7
Q

How do you work out pressure?

A

Force / cross sectional area

8
Q

What are hydraulics systems used as?

A

Force multipliers- they use a small force to produce a bigger force using liquid and cross sectional area

9
Q

What does a simple hydraulics system usually have?

A

Two pistons
One with a smaller cross sectional area than the other but as pressure is transmitted equally through a liquid the pressure at both pistons is the same

10
Q

Explain how a hydraulics system works?

A

1st piston a pressure is exerted on the liquids using a small force over a small area
This pressure is transmitted to the second piston
The second piston has a larger area so there will be a larger force

11
Q

What are hydraulics systems used in?

A

Car braking systems
Hydraulic car jacks
Deployment of landing gear on some aircraft