L9 Hydraulics & Pneumatics

What are the two important features of fluids used in hydraulic systems?

• Elasticity and viscosity

• Compressibility and ability to transmit light

• Incompressibility and ability to transmit pressure

• Density and transparency

Why is water not used in hydraulic systems for machinery?

• It is too expensive

• It causes parts of the system to rust

• It is not available in sufficient quantities

• It does not transmit pressure well

What role does a pump play in a hydraulic system?

• It cools down the hydraulic fluid

• It filters the hydraulic fluid

• It provides the pressure needed to move the fluid

• It seals the hydraulic fluid within the system

How is a hydraulic ram similar to a syringe?

• Both are used primarily in medical applications

• Both use a piston inside a cylinder to function

• Both are powered by electricity

• Both use air pressure to operate

What are the two main parts of a hydraulic cylinder as described in the image?

• Piston and fluid

• Barrel and piston

• Barrel and fluid

• Piston and lever

How does hydraulic fluid affect the movement of a hydraulic cylinder?

• It cools the cylinder

• It creates pressure that moves the piston

• It lubricates the piston

• It seals the cylinder

What is the primary function of hydraulic systems in commercial airplanes?

• To control the in-flight entertainment systems

• To adjust sections on the wings and the rudder for making turns and keeping the plane level

• To enhance the fuel efficiency of the airplane

• To increase the speed of the airplane during takeoff

What is the primary function of the heart in the circulatory system?

• To filter blood

• To provide the pressure needed to pump blood

• To produce blood cells

• To absorb nutrients

What is the primary medium used in pneumatic systems?

• Water

• Oil

• Air

• Electricity

Which of the following is NOT a tool powered by pneumatic systems?

• Screwdrivers

• Wrenches

• Jackhammers

• Electric drills