Basic Hydraulics System

What is Hydraulics a study of ?

• The movement of gases that convert fluid energy to mechanical energy

• The movement of oil that converts fluid energy into mechanical energy.

• The movement of solids within a liquid.

• All of the above

What is the formula for calculating Force ?

• Density v Volume

• Length x Width

• 3.142 x Atmospheric pressure

• Pressure x Area

What type of directional control valve is pictured here ?

• 3 way 3 position

• 4 way 3 position

• 2 way 2 position

• 5 way 3 position

What is the approx pressure range that Hydraulic systems operate in ?

• 20 - 40 psi

• 50-70 psi

• 700 - 9000

• 80 - 100 psi

What must you NEVER do with respect to a hydraulic hose leak ?

• Turn off the hydraulic pump before you start working on it

• Clean up oil spills immediately

• Lock and Tag the electrical switch and put the keys in your pocket.

• Place your finger over the leak in an attempt to stop this

When refilling oil after servicing a hydraulic system which type of oil should be used ?

• Re- use the old oil

• Specification 7345-12

• Use oil according to the manufacturers specification

• Car gearbox oil

What properties should hydraulic possess ?

• Ability to absorb water and get thin at high temperature

• Ability to absorb water and get thick at low temperatures

• Ability to reject water and remain stable across temperature range

• It should smell nice

What is the symbol pictured ?

• Flow control valve

• Double acting cylinder

• Adjustable Pressure Relief Valve

• Non Return Valve

Once hydraulic oil has done mechanical work where does it return to ?

• To the engineering factory drains

• Back to the tank or reservoir

• To the Atmosphere

• Non of the above

The basic idea behind any hydraulic system is very simple: Force that is applied at one point is tranitted to another point using________

• A compressible fluid

• An incompressible fluid

• A cold compress

• A hot compress