# Hydraulic principles

 The flashcards below were created by user Byronallen on FreezingBlue Flashcards. 4 Advantages of hydraulics systems? Lighter weightEase of installationSimplification of inspectionMinimum maintenance requirements Hydraulic systems are almost _____% efficient. 100% Hydraulic fluid is considered to be compressible or incompressible. incompressible The pressure exerted by a column of liquid is determined by height of the column or the volume of the container? height of the column Pascal's law states that the pressure in a closed system is transmitted ____and ____ to _____parts of the system. equally and undiminished to all parts of the system Force per unit area is a measure of? Pressure, measured in PSI or Kilos per square cm The relationship between Force, area, and pressure may be expressed using the formula? F=AxP In a hydraulic system the relationship between the area of the piston, distance it moves , and the volume of displaced fluid may be expressed by the formula______. Volume = Area x Distance What are 2 major advantage to hydraulic systems over mechanical systems? 1 Large gain in mechanical advantage by using different sized pistons.2 Ease that force can be transmitted over large distances A good hydraulic fluid must possess 4 propeties. Proper viscosityChemical stabilityHigh flashpointHigh firepoint What is the proper viscosity for hydraulic fluid? Thick enough to seal and lubricate but not too thick as to offer excessive friction _______ is the internal resistance to fluid flow of a liquid. Viscosity The temperature that a fluid gives off vapor in sufficient quantity to ignite momentarily is called? Flash point 3 types of hydraulic fluid currently being used in civilian aircraft are: Vegetable based (Mil-H-7644)Mineral based (Mil-H-5606)Synthetic (Skydrol) Is it permissible to mix different types of hydraulic fluid? No What is an example of a phosphate ester based fluid? Skydrol Vegetable base hydraulic fluid is essentially ______ oil and ______. Castor oil and alcohol Vegetable based hydraulic fluid is dyed _____. Blue What hydraulic fluid is dyed red ? Mil-H-5606 The most widely used hydraulic fluid in use today? Skydrol Skydrol is colored ? light purple Synthetic hydraulic fluid was designed to provide a _____ resistant hydraulic fluid Fire resistant If skydrol is spilled , it should be cleaned immediately with ______ and _______. Soap and water What fluid can be used to flush the hydraulic system of these fluids 1 vegetable 2 mineral 3 synthetic 1 Alcohol2 Naptha , varsol or stoddart solvents3 trichlorethylene What seal materials are used with the following hydraulic fluids: 1 Vegetable 2 Mineral 3 Synthetic 1 Natural rubber2 Neoprene3 Butyl rubber or ethylene-propylene elastomers The additives in 5606 help reduce____. Foaming AuthorByronallen ID124900 Card SetHydraulic principles Descriptioname principles of hydraulics airframe Updated2011-12-23T05:31:46Z Show Answers