Chapter 76- Lubrication Principles Flashcards
The intermeshing of gear tether is a place where lubrication
Shock absorption is very important
The lubricant performs a number of functions name two
Reduce wear
Reduce corrosion
Friction can be defined as
Resistance to motion
The separation of two surfaces which is brought about by an inter posing liquid is called
Lubrication
Lubrication can be achieved by using
Grease or oil
A material which is commonly used as a solid lubricant it
Molybdenum disulphide
Lubricant for an anti friction bearing is
Barium and lithium based grease
The majority of lubricants are
Mineral oils
Which type of grease is the cheapest and most commonly used?
Calcium based
The kind of grease used for heavily loaded machinery operating at slow speeds is the
Specialty grease
A semi- solid lubricant (3)
Has high viscosity
It to seal out dirt from bearings
Cannot be used for high temperatures
A semi solid lubricant (1) (bearings)
Is less likely to drip or splash from bearings
Greases are a mixture of mineral oil and
Soap
If ambient temperatures are low, the proffered lubricant is
Semi-solid lubricant
The property of an oil indicates its ability to support a load is
Viscosity
The resistance of a liquid to internal deformation or shear is known as
Viscosity
The ___________ number of an oil indicates the acidity of an oil.
Neutralization
Which type of oil produces a higher fluid friction
A high viscosity oil
If an oils viscosity changes much when little temperature changes then it will have a
Low viscosity index
