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Flashcards in Lubrication Deck (22):
0

List three kinds of friction and provide examples for each

Sliding friction. Moving your workbench


Rolling friction. Roller bearing


Fluid friction. Cold roll

1

What type of friction would produce the greatest heat

Sliding friction

2

What is the definition of this Viscosity

Viscosity is a term used to describe a liquid flow rate so if it has high viscosity it will flow slowly

3

How would an increase viscosity affect the load strength of the lubricant

The molecules will form a tighter bond thus allowing it to be stronger

4

How would a decrease in viscosity affect the power consumption of a machine

In a lower for Viscosity the molecules are less packed the thus being able to flow easier

5

What is the worldwide excepted unit of measure of oil viscosity

Centistokes

6

How is the poor point of oil determent

The lowest temperature oil is observed to slow

7

The type of lubricant film that forms under a loaded rolling element of bearing is called

Oil wedge

8

What percentage of Industrial lubricants would be additives

22%

9

The oxidize edition rate of petroleum based oil doubles for every blank degrees Celsius temperature rises above blank degrees Celsius

8°C and 55°C

10

What would be the correct level of oil and a pillow block housing for antifriction Bearing

Between one third and 1 Half Way up the lowest rolling element in the oil bath

11

Wick feed oilers rely on what action to deliver the oil to the lubrication point

Capelli reaction

12

List three types of nozzles used in an oil must lubrication system and her application

Spray fittings. High-speed antifriction bearings


Condensing fitting slow-moving slide and Machine tool ways


Missed fittings. Change drives gearsets or bearings

13

Divider block lubrication systems are designed for which application

Large stationary engines and reciprocating compressors

14

What is it meant by the term drop point

The lowest temperature at which lubricant will begin to drip from Greece

15

Which wears out the base oil or the additives

The additives

16

What is the most widely used crude oil base stock in North America

Paraffin base stock

17

Why were synthetic oil's developed

To solve the lubrication problems that cannot be overcome by petroleum based oil's

18

What is the temperature limit for anti-where at additives

hundred degrees Celsius

19

How does a grease thickener work

The thickener acts like a sponge to hold the lubricant and also controls the flow of the grease to the areas to be lubricated

20

What is the drop point referring to in a grease

The lowest temperature at which the lubricant will begin to drip from the grease

21

What are the three types of solid lubricant used in industry

Graphite
Teflon
Molybdenum disulphide