- 1. Tribology plays a vital role in machine design, as it focuses on understanding and minimizing friction, wear, and lubrication in mechanical systems. By considering tribological principles, engineers can enhance the performance, efficiency, and longevity of machines. Through careful selection of materials, surface coatings, and lubricants, designers can mitigate the effects of friction and wear, leading to smoother operation and reduced maintenance requirements. Additionally, an in-depth understanding of tribology allows for the optimization of contact interfaces and the prevention of premature component failure. In essence, tribology is the cornerstone of successful machine design, ensuring reliability and functionality in various industrial applications.
What does the term 'tribology' refer to in machine design?
A) The study of friction, wear, and lubrication
B) The process of material deformation in machines
C) The design of machine components
D) The process of heat transfer in machines
- 2. Which of the following is a common purpose of lubrication in machine design?
A) Adding color to machine components
B) Reducing friction and wear
C) Reducing machine weight
D) Increasing machine speed
- 3. What is the term used to describe the resistance to motion when two surfaces are in contact?
A) Wear
B) Friction
C) Adhesion
D) Lubrication
- 4. What is the term used to describe the gradual removal of material from surfaces due to friction?
A) Adhesion
B) Wear
C) Surface roughness
D) Lubrication
- 5. Which type of lubrication mechanism relies on the relative motion of surfaces to maintain a lubricating film?
A) Mixed lubrication
B) Hydrodynamic lubrication
C) Boundary lubrication
D) Solid lubrication
- 6. What is the term for the ability of a material to withstand repeated loading without fracturing?
A) Hardness
B) Fatigue strength
C) Elastic modulus
D) Ductility
- 7. Which of the following factors can affect the selection of lubricant in machine design?
A) Noise level
B) Surface color
C) Operating temperature
D) Presence of electricity
- 8. Which of the following is NOT a common method to reduce friction in machine components?
A) Polishing surfaces
B) Increasing surface roughness
C) Using wear-resistant coatings
D) Using lubricants
- 9. What is the term for the transfer of material between two surfaces in contact?
A) Adhesion
B) Lubrication
C) Wear
D) Friction
- 10. Which type of lubrication mechanism involves a combination of fluid and solid lubricants in machine design?
A) Solid lubrication
B) Mixed lubrication
C) Boundary lubrication
D) Hydrodynamic lubrication
- 11. What property of materials describes their ability to be stretched or deformed without breaking?
A) Ductility
B) Hardness
C) Fatigue strength
D) Elastic modulus
- 12. What is the term for the removal of material from surfaces due to the combined effects of mechanical wear and chemical reactions?
A) Erosive wear
B) Corrosive wear
C) Abrasive wear
D) Adhesive wear
- 13. Which of the following factors can lead to lubrication failure in machine components?
A) Low friction
B) Low pressure
C) Smooth surfaces
D) High temperature
- 14. Which material is commonly used as a solid lubricant in tribology?
A) Aluminum
B) Copper
C) Graphite
D) Steel
- 15. What kind of bearing consists of a set of balls confined to move in a circular path?
A) Roller bearing
B) Ball bearing
C) Flange bearing
D) Sleeve bearing
- 16. What is the study of the process of wear between interacting surfaces?
A) Electromagnetism
B) Mechanics
C) Tribology
D) Acoustics
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