- 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 heat transfer in machines
C) The design of machine components
D) The process of material deformation in machines
- 2. Which of the following is a common purpose of lubrication in machine design?
A) Reducing machine weight
B) Reducing friction and wear
C) Increasing machine speed
D) Adding color to machine components
- 3. What is the term used to describe the resistance to motion when two surfaces are in contact?
A) Lubrication
B) Adhesion
C) Friction
D) Wear
- 4. What is the term used to describe the gradual removal of material from surfaces due to friction?
A) Lubrication
B) Surface roughness
C) Wear
D) Adhesion
- 5. Which type of lubrication mechanism relies on the relative motion of surfaces to maintain a lubricating film?
A) Boundary lubrication
B) Solid lubrication
C) Mixed lubrication
D) Hydrodynamic lubrication
- 6. What is the term for the ability of a material to withstand repeated loading without fracturing?
A) Elastic modulus
B) Hardness
C) Fatigue strength
D) Ductility
- 7. What is the term for the removal of material from surfaces due to the combined effects of mechanical wear and chemical reactions?
A) Abrasive wear
B) Adhesive wear
C) Corrosive wear
D) Erosive wear
- 8. What kind of bearing consists of a set of balls confined to move in a circular path?
A) Roller bearing
B) Ball bearing
C) Sleeve bearing
D) Flange bearing
- 9. Which of the following factors can lead to lubrication failure in machine components?
A) Smooth surfaces
B) Low friction
C) High temperature
D) Low pressure
- 10. Which of the following factors can affect the selection of lubricant in machine design?
A) Noise level
B) Operating temperature
C) Surface color
D) Presence of electricity
- 11. What is the term for the transfer of material between two surfaces in contact?
A) Friction
B) Adhesion
C) Wear
D) Lubrication
- 12. Which of the following is NOT a common method to reduce friction in machine components?
A) Using lubricants
B) Increasing surface roughness
C) Using wear-resistant coatings
D) Polishing surfaces
- 13. Which material is commonly used as a solid lubricant in tribology?
A) Graphite
B) Copper
C) Steel
D) Aluminum
- 14. What is the study of the process of wear between interacting surfaces?
A) Mechanics
B) Electromagnetism
C) Acoustics
D) Tribology
- 15. Which type of lubrication mechanism involves a combination of fluid and solid lubricants in machine design?
A) Boundary lubrication
B) Hydrodynamic lubrication
C) Mixed lubrication
D) Solid lubrication
- 16. What property of materials describes their ability to be stretched or deformed without breaking?
A) Fatigue strength
B) Ductility
C) Hardness
D) Elastic modulus
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