Tribology And Maintenance Engineering (ME-802 (B)) - Important Questions

What are the historical developments and industrial significance of tribology?

Differentiate between conforming and non-conforming contact.

Define elastic half-spaces / spheres in contact mechanics.

List the assumptions in Hertzian analysis of contact between surfaces.

Describe the physical vapour deposition (PVD) coating technique with the help of a sketch.

Describe the hard facing coating technique with the help of a sketch.

Define electroplating.

Explain advantages and disadvantages of the electroplating method.

Explain any five microstructural treatments of coatings.

Explain stick-slip phenomenon.

State Amontons' laws of friction and explain the exceptions to these laws.

Explain Bowden-Tabor theory of friction.

Explain methods to reduce the adhesive component of friction.

Explain any two factors affecting friction.

List out any three friction measuring equipment. Explain any one of the methods in detail.

Explain any three geometrical parameters of a coating.

Suggest two coating methods to improve high temperature oxidation and corrosion resistance.

Explain tribo-surface preparations and characteristics of engineering surfaces.

Define wear and explain any two types of wear.

Mention any five factors affecting wear and explain them.

Suggest any two methods of coating for acidic environments.

Explain the different types of bearings / lubrication regimes based on lubricant film thickness, including hydrodynamic and elastohydrodynamic lubrication.

A pin-on-disc test gives volume loss of 12 mm3 for sliding distance 1000 m under 20 N load. Calculate specific wear rate and differentiate two-body and three-body abrasive wear.

Explain boundary, mixed and fluid-film lubrication with reference to Stribeck curve and suitable applications.

Explain the classification of bearings based on the applied load.