Lubrication basics Flashcards
___ is friction between two surfaces NOT in motion.
Static friction
___ Friction is present and many pieces of power plant equipment with ball bearings.
Rolling
___ are desirable lubricants because they are virtually incompressible and support very heavy loads.
Mineral oils
Lubricants are classified by their ___.
Viscosity
___ refers to the weight or pressure on the two contacting surfaces in a rotating piece of machinery.
Load
Even with a good lubricant, such as oil, solid friction can be replaced with ___.
– Fluid friction
– solid friction
– static friction
X sliding friction
? Unknown
___ may be used on components that cannot retain a supply of oil, such as open bearing or gears.
Grease
Which of the following will NOT affect a lubricants viscosity?
– Temperature of machinery
– the application method
– load on machinery
– machinery speed
The application method
Lubricant’s ___ is determined by the measure of time it takes a fluid to flow through a calibrated flow device.
Viscosity
Static friction is friction between two surfaces not in motion and is encountered ___.
Upon start up
What is the single most common reason for operating equipment failure?
Wear
What is the single most important property of a lubricant?
Viscosity
___ Is produced when the roughness of two surfaces contact one another.
Solid friction
Greece is a mixture of ___.
Oil and soap
An example of solid lubricant is a ___.
Non stick Frying pan
