Chapter 30 Lubrication Flashcards
1
Q
1. Frequently, it is possible to improve the desirable characteristics of lubricating oil by the use of all of the following additives except: A. Anti-oxidants B. Detergent-dispersants C. Pour point depressants D. Emulsion breakers E. Corrosion inhibitors
A
D. Emulsion breakers
2
Q
2. Frequently, it is possible to improve the desirable characteristics of lubricating oil by the use of all of the following additives except: A. Anti-oxidants B. Detergent-dispersants C. Emulsion breakers D. Viscosity index (VI) improvers E. Antifoam additives
A
C. Emulsion breakers
3
Q
3. Materials that are used as solid lubricants include all of the following except: A. Graphite B. Soapstone C. Molybdenum disulphide D. Mica E. Petroleum oil
A
E. Petroleum oil
4
Q
4. Fixed oils also called fatty oils produced from all of the following except: A. Lard B. Whale oil C. Castor oil D. Petroleum oil E. Cottonseed oil
A
D. Petroleum oil
5
Q
5. One of the general classes of lubricants is the: A. Semi-solid B. Grease C. Oil D. Semi-liquid E. Gas
A
A. Semi-solid
6
Q
6. One of the general classes of lubricants is the: A. Gas B. Grease C. Oil D. Semi-liquid E. Solid
A
E. Solid
7
Q
7. Solid lubricants are suitable for use under conditions of: A. Low load B. Dampness C. Dust D. High load E. Corrosive atmospheres
A
D. High load
8
Q
8. Where the materials of moving surfaces are in contact with each other, they tend to cling or weld together resulting in extra force called the \_\_\_\_\_ force being required to move the surfaces. A. Reaction B. Friction C. Normal D. Gravitational E. Centrifugal
A
B. Friction
9
Q
- While providing lubrication, semi-solid lubricants (grease) are not able to:
A. Remove large amounts of heat from the bearing
B. Seal out dirt from bearings
C. Seal out water from bearings
D. Give bearing surfaces a protective coating
E. Prevent rusting during idle periods
A
A. Remove large amounts of heat from the bearing
10
Q
10. The pour point of oil is the \_\_\_\_\_ at which the oil will flow. A. Highest temperature B. Lowest pressure C. Lowest temperature D. Highest pressure E. Lowest viscosity
A
C. Lowest temperature
11
Q
11. If the moving surfaces of materials can be separated from each other by a/an \_\_\_\_\_ so that their high spots do not come in contact with each other wear will be reduced or eliminated. A. Oil B. Grease C. Lubricant D. Space E. Solid
A
C. Lubricant
12
Q
- As the temperature decreases the oil will become:
A. Thicker and less viscous (viscosity will be increased)
B. Thicker and more viscous (viscosity will be decreased)
C. Thinner and more viscous (viscosity will be increased)
D. Thicker and more viscous (viscosity will be increased)
E. Thinner and less viscous (viscosity will be increased)
A
D. Thicker and more viscous (viscosity will be increased)
13
Q
- If oil has a low viscosity index (VI), this indicates that its viscosity:
A. Changes little with temperature change
B. Changes greatly with temperature change
C. Changes little with pressure change
D. Changes greatly with pressure change
E. Does not changes with temperature change
A
B. Changes greatly with temperature change
14
Q
14. Often chemical compounds (additives) are added to the lubricant to prevent the formation of \_\_\_\_\_ due to oxidation of the oil. A. Alkaloids B. Alkalines C. Hydrocarbons D. Mercaptans E. Acids
A
E. Acids
15
Q
- As the temperature increases the oil will:
A. Thin out and become more viscous (viscosity will be reduced)
B. Thin out and become less viscous (viscosity will be increased)
C. Thin out and become less viscous (viscosity will be reduced)
D. Thicken and become less viscous (viscosity will be reduced)
E. Thicken and become more viscous (viscosity will be reduced)
A
C. Thin out and become less viscous (viscosity will be reduced)
