Lubrication

Question 0

What are some negative effects of friction

Answer 0

Causes wear
generates waste heat
is resistant to movement increasing power consumption

Question 1

Friction resistance movement what is the lubricants main job

Answer 1

To reduce resistance

Question 2

Positive effects of friction

Answer 2

Provides traction between rolling elements
promotes accurate tracking in bearing raceways
provides a means of starting stopping and acceleration

Question 3

Three types of friction

Answer 3

Sliding
rolling
fluid

Question 4

What is sliding friction

Answer 4

Produce when one surface slides across another

Question 5

What is rolling friction

Answer 5

Movement of one surface rolling over another

Question 6

What is fluid friction

Answer 6

Resistance to flow within the fluid

Question 7

How does a lubricant reduce friction

Answer 7

Separates the moving surfaces with a film that has less friction that a moving surface

Question 8

What are four functions of a lubricant

Answer 8

Protect against corrosion
carry away heat
carry away contaminants
help seal

Question 9

What is a full film lubrication

Answer 9

Think enough to completely separate the surfaces within a continuous film

Question 10

What is the last elasto-hydrodynamic film lubrication

Answer 10

Completely separates two surfaces and is therefore a type of fulfillment lubrication

Question 11

How is a boundary film formed

Answer 11

Low speeds
Viscosity is too low to support the load
Not enough lube

Question 12

How is an oil wedge created

Answer 12

Uses the rotation of the shaft to form an oil wedge that forces a full film of fluid into the loaded area

Question 13

What is viscosity

Answer 13

Measurement of fluid friction

Fluids that have low viscosity, flow easy

Question 14

Does viscosity effect film strength

Answer 14

Yes

Question 15

Three factors that affect viscosity

Answer 15

Temperature
pressure
speed

Question 16

What is pour point

Answer 16

Lowest temperature at which an oil is observed to flow

Question 17

What are centistokes

Answer 17

Unit of viscosity that has been excepted by industry worldwide

Question 18

Viscosity index is a number that

Answer 18

Identifies the amount of change in the viscosity of a lubricant over a temperature range

Question 19

What is it called when a vapor above an oil will ignite when a flame is passed over it

Answer 19

Flash point

Question 20

How is a low temperature engine grade indicated

Answer 20

With a “W”

Question 21

Oils without a “W” are for what season

Answer 21

Summer

Question 22

What is the purpose of a multigrade engine oil

Answer 22

To accommodate the start up in conditions that are both hot and cold

Question 23

Where are naptha based oil’s mainly used

Answer 23

North America

Question 24

Between Paraffin and naptha what has a very high wax content

Answer 24

Paraffin

Question 25

What based oil's do not wear out

Answer 25

Petroleum based

Question 26

What are problems are synthetic oils developed to solve

Answer 26

To solve lubricating problems.

Question 27

Is there wax in synthetic oil's

Answer 27

No

Question 28

What are additives

Answer 28

Chemicals that are added to the base oil to enhance the performance of the oil under specific operating conditions

Question 29

What percentage do additives make up of oil

Answer 29

22%

Question 30

What do you rust and corrosion inhibitors avoid

Answer 30

Costly maintenance and repair fees

Question 31

Two types of corrosion

Answer 31

Rusting and acid attack

Question 32

Extreme pressure additive protect against what

Answer 32

Welding of surface asperities when metal to metal contact occurs.

Question 33

Common types of solid additives

Answer 33

Graphite molybdenum Teflon

Question 34

How far up the lowest rolling element in an oil bath should the oil be

Answer 34

1/3 to 1/2 way up the lowest rolling element

Question 35

What does a bottle oiler rely on to lubricate

Answer 35

Vibrations

Question 36

What does a wick feed oiler rely on

Answer 36

Capillary action or attraction

Question 37

Drop feed oiler relies on what to lubricate

Answer 37

Gravity

Question 38

How does a ring or chain oiler work

Answer 38

Hangs from the shaft and dips into an oil bath and transfers oil onto the shaft to flow into the bearing

Question 39

How does a pressure lubrication system work

Answer 39

A pump delivers the oil onto the shaft which flows on to the bearings

Question 40

Two types of air activated lubrication systems

Answer 40

Oil mist and the air oil system

Question 41

What applications is a blocked lubricator used for

Answer 41

Large stationary engines and reciprocating compressors

Question 42

What is it called when oil is circulated through The machines bearings and back through the filters on the lubrication console to remove any contaminants that are in the system

Answer 42

Oil line flushing

Question 43

Greece is a liquid lubricant mixed with what

Answer 43

Thickener

Question 44

List three properties of a multipurpose grease

Answer 44

Wide temperature range water resistant Mechanically stable in high speed bearings

Question 45

Is a lower number of grease going to be thicker or thinner

Answer 45

Thinner

Question 46

What are the two methods of applying grease

Answer 46

Single point and centralized

Question 47

Single point Greece message don't need any what?

Answer 47

Pumps Metering Valves