Lubrication Flashcards
What type of oil or grease would be used in a heavy load situation?
Extreme pressure lubricant
The most common measurement of kinematic viscosity is what?
Centistokes
When grease moves in a bearing, it tends to shear. This is known as:
Directional fluidity
What type of lubricant is used under shock load conditions?
EP lubricant
Viscosity is defined as which of the following?
Measurement of a fluid’s resistance to flow
A grease lubricant soluble in water is which of the following?
Sodium
How many cubic inches are in 1 US gallon?
231
What does 1 cubic foot of oil weigh?
Between 55 and 58 lbs
What happens to a fluid when it vaporizes?
It implodes
What is detergent in oil used for?
It keeps the internal parts of a system clean
What is aeration in reference to oils?
When oil is air entrained
How much pressure does the weight of 1 cubic foot of oil generate?
0.4 psi
What is laminar flow?
Oil flowing in a smooth flow pattern
What is Bernoulli’s principal?
If flow is constant, the sum of kinetic and potential energy is constant
What are the three types of friction?
Fluid, rolling, sliding
What is mist lubrication used for?
High speed bearings and high velocity roller chain
What is pour point?
The lowest temperature at which oil will flow
How are gearboxes lubricated?
Splash method
When pressure is applied to fluid at rest, force is transmitted equally in all directions at right angles to the containing surface. This is known as?
Pascal’s law
What is the best lubrication condition?
Full film
What type of gear oil is used for high heat and heavy loads?
EP
What type of lubricant to use if gears in a gearbox are wearing?
EP oil
What type of testing is performed on oil to check for metallic contaminants?
