Chapter 76- Lubrication Principles

Question 1

The intermeshing of gear tether is a place where lubrication

Answer 1

Shock absorption is very important

Question 2

The lubricant performs a number of functions name two

Answer 2

Reduce wear

Reduce corrosion

Question 3

Friction can be defined as

Answer 3

Resistance to motion

Question 4

The separation of two surfaces which is brought about by an inter posing liquid is called

Answer 4

Lubrication

Question 5

Lubrication can be achieved by using

Answer 5

Grease or oil

Question 6

A material which is commonly used as a solid lubricant it

Answer 6

Molybdenum disulphide

Question 7

Lubricant for an anti friction bearing is

Answer 7

Barium and lithium based grease

Question 8

The majority of lubricants are

Answer 8

Mineral oils

Question 9

Which type of grease is the cheapest and most commonly used?

Answer 9

Calcium based

Question 10

The kind of grease used for heavily loaded machinery operating at slow speeds is the

Answer 10

Specialty grease

Question 11

A semi- solid lubricant (3)

Answer 11

Has high viscosity
It to seal out dirt from bearings
Cannot be used for high temperatures

Question 12

A semi solid lubricant (1) (bearings)

Answer 12

Is less likely to drip or splash from bearings

Question 13

Greases are a mixture of mineral oil and

Answer 13

Soap

Question 14

If ambient temperatures are low, the proffered lubricant is

Answer 14

Semi-solid lubricant

Question 15

The property of an oil indicates its ability to support a load is

Answer 15

Viscosity

Question 16

The resistance of a liquid to internal deformation or shear is known as

Answer 16

Viscosity

Question 17

The ___________ number of an oil indicates the acidity of an oil.

Answer 17

Neutralization

Question 18

Which type of oil produces a higher fluid friction

Answer 18

A high viscosity oil

Question 19

If an oils viscosity changes much when little temperature changes then it will have a

Answer 19

Low viscosity index