Lubrication 1

Question 1

Correct lubrication reduces?

Answer 1

Friction

Question 2

Friction between moving surfaces is grouped into three main types.

Answer 2

Rolling, Sliding, Fluid

Question 3

Bearings that use rolling members to reduce friction are called?

Answer 3

Anti friction bearings

Question 4

The force that causes unlike materials to stick together is called? SLE/IP

Answer 4

Adhesion

Question 5

The force that causes like materials to stick together is called? SLE/IP

Answer 5

Cohesion

Question 6

Resistance to flow is defined as the?

Answer 6

Viscosity

Question 7

Heating oil causes its viscosity to?

Answer 7

Decrease

Question 8

During start up, a rotating shaft forms an?

Answer 8

Oil wedge

Question 9

The efficiency of an oil wedge depends upon?

Answer 9

Shaft surfaces, Clearance between between surfaces, operating temperature.

Question 10

Over lubricating threaded holes or screws may cause?

Answer 10

Hydraulic lock

Question 11

Additives an inhibitors are introduced into oils to control?

Answer 11

Air, water, and load

Question 12

Petroleum and vegetable oils react with oxygen, this is called?

Answer 12

Oxidation

Question 13

The ability of a petroleum oil to seperate from water upon standing is called? SLE/IP

Answer 13

Demulsibilty

Question 14

The ability of a petroleum oil to mix with water such as machine shop cutting fluid is ? SLE/IP

Answer 14

Emulsibility

Question 15

Additives that are used for heavy loads or shock load conditions are called?

Answer 15

Extreme pressure additives

Question 16

Oil lubrication is applied in two main types of systems?

Answer 16

Once through and enclosed

Question 17

The above drawing shows?

Answer 17

Oiler rings

Question 18

The most commonly used method of lubrication in an enclosed gear system is?

Answer 18

The splash method

Question 19

The recommended method for lubricating high speed bearings and high velocity roller chains is the?

Answer 19

Oil mist method

Question 20

The above drawing shows 2 lubrication systems, whats the most likely application for pump B?

Answer 20

Multiple lubrication points

Question 21

Greases are usually made by thickening lubricating oils with?

Answer 21

Soap

Question 22

Greases recommended for water resistance and high temperature are called?

Answer 22

Lithium and barium soap

Question 23

The most common additive for increasing the anti wear capacity of a grease is?

Answer 23

Molybdenum disulfide

Question 24

The temperature at which grease becomes fluid enough to drip is called the ?

Answer 24

Dropping point.

Question 25

On low speed applications with extreme conditions of moisture, dirt, or poor sealing, it is recommended to fill the bearing housing with grease to the?

Answer 25

Full mark

Question 26

The above drawing shows a?

Answer 26

Spring compression grease cup.

Question 27

When lubrication open gears, you should consider?

Answer 27

Gear materials, Environment, Temperature.

Question 28

The type of lubrication for enclosed gears depends upon?

Answer 28

Load, Operating speed, Operating temperature.

Question 29

When the pressure between meshing gear teeth is too high, the oil film?

Answer 29

Will fail

Question 30

The oil bath bearing should not exceed the?

Answer 30

The mid point of the lowest rolling member.

Question 31

In the above diagram is the oil bath acceptable?

Answer 31

yes

Question 32

One advantage of using grease as a lubricant is?

Answer 32

It provides better start up protection after short periods of down time.

Question 33

The advantages of using oil as a lubricant are?

Answer 33

Lubricates well at high to very high speeds, Can be used as a heat exchange medium, Can be removed easily from the housing, All of the above.

Question 34

The main purpose of using cutting fluid during machining process is to?

Answer 34

Cool the work piece by reducing friction.

Question 35

Straight cutting oils may be classified as?

Answer 35

Active or in active.

Question 36

Oils that may be mixed with water and used as cutting solutions are called?

Answer 36

Emulsifiable

Question 37

Chemical oils that are soluble and contain rust inhibitors are generally used for?

Answer 37

Grinding

Question 38

When handling lubricants, it is always advisable to? IP

Answer 38

Avoid skin contact by wearing gloves an aprons etc, Avoid breathing mist or fumes, Wash hands and arms fully at the end of each shift, All of the above

Question 39

When doing lubrication preventative maintenance, the millwright should look for?

Answer 39

Low levels or lack or lubricant, Heat or smell of burn oil, Excessive noise in drive units, All of the above

Question 40

"Active" oils react with ?

Answer 40

Non ferrous metals

Question 41

Which of the following additives would be used to control the action of water in oil?

Answer 41

De-emulsifying and anti corrosion.

Question 42

The four main points to consider when selecting a lubricant is the clearance between moving parts, the operating temperatures, the weight on the moving parts and the?

Answer 42

The rubbing velocity

Question 43

The lowest temperature that an oil will run is its pour point, the lowest temperature a grease will run is called?

Answer 43

Dropping point.

Question 44

A certain machine has a operating temperature that is so high that the oil life is short. the correct approach to the problem is to?

Answer 44

Troubleshoot, lower the machine temperature through engineering, adding systems or upgrading.

Question 45

As a general rule, when the RPM of a rotating part is increased, the viscosity of the oil used will?

Answer 45

Be decreased

Question 46

The general lubricant used when drilling cast iron is?

Answer 46

No lubricant.... cause it has graphite in it

Question 47

Which of the following is the hardest or stiffest grease?

Answer 47

Number 6

Question 48

What are some common cause of lubrication problems in anti friction bearings?

Answer 48

Contaminated bearing, not enough lubricant, to much lubricant to often, all answer below

Question 49

Which of the following types of gear oil would be most probably recommended for the gear case of an over head crane?

Answer 49

Gear oil with an EP additive.

Question 50

The oil additive that retards the chemical decomposition of an oil is ?

Answer 50

Anti-oxidant.