Tribology Assignment – I

Department of Mechanical Engineering

DVR & Dr. HS MIC College of Technology

Tribology

Assignment – I

1. (a) Differentiate between absolute and kinematic viscosity.

    (b) Explain how temperature influences the viscosity of a fluid.

2. List out various viscometers used in industry. Explain their constructional features and working.

3. Define viscosity index. Explain the method of determination of viscosity index. What is the practical use of viscosity index?

4. Derive Reynolds equation for pressure distribution in a fluid film.

5. With the help of a line diagram explain the construction and working of a hydro-Static thrust bearing.

6. Derive an equation for normal load carrying capacity of a circular step bearing.

7. Explain the concept of hydrodynamic instability in bearings.

8. Derive an equation for load bearing capacity of an infinitely short journal bearing.

9. Explain the design procedure of a journal bearing.

10. Derive Petroffs equation and what is the importance of Sommerfield Number in bearing design.

Prepared By
U.Kishore Babu