Notecards Flashcards
Any force, which can stop or retard the movement of a body
Resistance
Energy can neither be created nor destroyed, although it may change from one form to another
Law of conservation of energy
An important consideration when dealing with energy is
The state or condition in which it is found
The application of a force to cause movement of an object through a distance
Work
How does a positive displacement pump work?
As the piston is pulled out and increasing volume is formed within the housing, the body and portal food to entered, filling the void. The plunger pushes in the ball at the in wet port closes. The food is pushed out while the ball at the outlet port is opened.
The volume of fluid flowing through tubing in a period of time is
Rate of flow
The generation of heat by working energy traveling through a system to a point of work
System in efficiency
A common food for a hydraulic system consist of
Paraffinic and naphthalenic petroleum oils
Besides acting as a medium for energy transmission the second most important function of a petroleum base fluid is
To act as a lubricant
The process of reducing friction between relatively moving surfaces, which are in contact is
Lubrication
The resistance of a liquid molecules to flow or slide past each other
Viscosity
Say Bo universal second is abbreviated as
SUS or SSU
American Society for testing materials is abbreviated as
ASTM
As high-temperature oxidation at pump outlet occurs resonance materials are formed, but dissolve in the oil when a hot surface is encountered
The resins come out of a solution for a varnish coding, the hot surface this causes moving parts to stick
Other than varnish, resonance materials can also form
Sledge which combines with dirt and floats around in the system plugging small openings
Dirt and a hydraulic fluid can
Plug, sensing orifices, causing moving parts to stick in where excessively
A high-pressure line with a pinhole leak, spraying and oil mist into the air is
A combustible mixture, which can be easily ignited by an open flame
Synthetic fire, resistant materials are man-made liquids, which are
Praised for their resistance to burning while performing close to petroleum oil with respect to lubrication