| Pascal's law | pressure exerted on a fluid in an enclosed container is transmitted equally and undiminished to all parts of the container and acts as right angles to enclosing walls. |
| When is mechanical advantage achieved in a hydraulic system ? | By having an output piston that is larger than the input piston |
| Viscosity | is the internal resistance to flow |
| viscosity increases as ........ | temp decreases |
| what happens if fluid is to thick ? | it causes power loss and higher operating temps |
| what happens if the fluid is too thin? | it will lead to excessive wear of parts that are under load or that move due to friction |
| Flash point | is the temp at which a fluid gives off enough vapour to ignite momentarily when exposed to a flame. A high flash point is desirable for hydraulic fluid |
| fire point | is the temp at which a fluid gives off enough vapour to ignite and continue to burn when exposed to a flame.A high fire point is also desirable |
| if the system is contaminated with the wrong fluid you must....? | drain and flush. the system before operation |
| can you mix hydraulic fluid ? | NO NEVER. |
| Vegetable based fluid also called ... | MIL-H-7644 |
| Vegetable based fluid id died ..... | Blue |
| mineral based fluid is also called ? | MIL-H-5606 |
| It is died | RED |
| what kind of seals and hoses does MIL-H-5606 use ? | Neoprene |
| phosphate ester based is died ? | PURPLE |
| phosphate is used in what kind of aircraft ? | modern large aircraft and high performance |
| fire resistant to ...... | 6000 degrees F (almost non flammable ) |
| Phosphate Ester is also called | MIL-H-8446 |
| The most common trade name is | SKYDROL |
| seals and hoses consist of | Butyl, sillicon rubber and teflon |
| MIL-H-8446 can be flushed with ? | Trichloroethylene |
| What is the most widely used fluid in general aviation aircraft ? | MIL-H-5606 (Mineral based) |
| what are the effects of air getting into the system ? | air causes spongy response during system operation |
| What the effects of water getting into the system ? | will cause corrosion of metallic surfaces, microorganisms will grow and spread in hydraulic fluid and will clog filters and reduce system performance |
