Chapter 6 - Lubrication

Question 1

What is the purpose of lubrication?

Answer 1

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Question 2

Name and describe the types of friction.

Answer 2

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Question 3

How is oil attracted to a surface to be lubricated?

Answer 3

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Question 4

Describe how oil will separate two metal surfaces sliding over one another.

Answer 4

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Question 5

Describe oiliness.

Answer 5

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Question 6

Describe how viscosity affects the lubricating qualities of oil

Answer 6

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Question 7

How is minimum power loss achieved through lubrication?

Answer 7

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Question 8

How does temperature affect viscosity?

Answer 8

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Question 9

Describe how viscosity is measured using the Saybolt viscosimeter

Answer 9

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Question 10

Which oil will change viscosity more due to temperature change

• an oil with a VI of 20 or
• an oil with a VI of 100?

Answer 10

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Question 11

Describe the oil wedge theory

Answer 11

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Question 12

Describe boundary lubrication

Answer 12

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Question 13

How is oxidation of oil controlled?

Answer 13

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Question 14

How is air (foam) controlled in oil?

Answer 14

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Question 15

How is water controlled in lubricating oils?

Answer 15

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Question 16

How is wear and load capacity enhanced in lubricating oils?

Answer 16

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Question 17

Why are extreme pressure oils never mixed with other oils?

Answer 17

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Question 18

What is the purpose of detergents and dispersants in oils and what oils are they used in?

Answer 18

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Question 19

Describe the following wasted oil or once-through system:

- squirt can

Answer 19

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Question 20

Describe the following wasted oil or once-through system:

- wick-feed oil

Answer 20

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Question 21

Describe the following wasted oil or once-through system:

- drip-feed Oiler

Answer 21

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Question 22

What quality of oil is used in the following system:

- once-through systems

Answer 22

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Question 23

What quality of oil is used in the following system:

- enclosed lubricating systems

Answer 23

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Question 24

Describe he following enclosed lubricating system:

- ring oiler

Answer 24

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Question 25

Describe he following enclosed lubricating system:

- splash lubrication

Answer 25

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Question 26

Describe he following enclosed lubricating system:

- oil bath lubrication

Answer 26

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Question 27

Describe he following enclosed lubricating system:

- re-circulating lubrication

Answer 27

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Question 28

Describe he following enclosed lubricating system:

- oil mist lubrication

Answer 28

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Question 29

How does overfilling the lubricating system affect its operation?

Answer 29

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Question 30

Describe both accurate and approximate methods of quality checks on used lubricating oil

Answer 30

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Question 31

What is grease composed of?

Answer 31

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Question 32

What properties of grease can be attributed to the thickener?

Answer 32

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Question 33

Describe the following:

- complex soap greases

Answer 33

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Question 34

Describe the following:

- non-soap greases

Answer 34

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Question 35

Describe the following:

- multi-purpose greases

Answer 35

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Question 36

Describe the following:

- extreme pressure greases (EP)

Answer 36

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Question 37

How does the National Grease Institute (NLGI) grade grease?

Answer 37

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Question 38

Describe the following:

- dropping point

Answer 38

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Question 39

Describe the following:

- directional fluidity

Answer 39

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Question 40

What factors are considered when choosing a grease for a certain application?

Answer 40

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Question 41

Describe how to hand-pack a bearing

Answer 41

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Question 42

How are grease guns advantageous over hand-packing?

Answer 42

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Question 43

How is metering achieved on a spring-compression grease cup?

Answer 43

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Question 44

Describe the operating principles of automatic lubricators

Answer 44

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Question 45

What conditions should be considered for the lubrication of open gears?

Answer 45

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Question 46

What factors should be considered for the lubrication of enclosed gears?

Answer 46

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Question 47

What type of lubricant should be considered for work-wheel and hyoid gears?

Answer 47

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Question 48

What should be watched for on a trial run with a new lubricant?

Answer 48

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Question 49

What lubricant should be used for high-speed operation and extreme temperatures?

Answer 49

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Question 50

What is the recommended oil level for oil bath lubricated ball bearings and why is it important?

Answer 50

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Question 51

Compare grease to oil as a lubricant.

Answer 51

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Question 52

What are the functions of the lubricant during machine operations?

Answer 52

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Question 53

What type of oil are used for machining operations?

Answer 53

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Question 54

What procedures should be followed when using cutting fluids?

Answer 54

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Question 55

What safety precautions should be used when handling lubricants?

Answer 55

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Question 56

What body or bodies regulate the handling, storage and disposal of lubricants?

Answer 56

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