Reg No.:

06000ME369122004 Pages: 2

Name:

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY

Fifth Semester B.Tech Degree Regular and Supplementary Examination December 2020

Max. Marks: 100

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4 2)
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5 a)
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Course Code: ME369
Course Name: TRIBOLOGY

PARTA
Answer any three full questions, each carries 10 marks.
Write a short note on Jost’s report.
Differentiate between conforming and non-conforming contact.
Explain the topography of engineering surface with neat sketch.
Write the advantages and disadvantages of cylindrical roller bearings.
Write any three applications of sliding bearings.
Explain are the historical developments of tribology.
List out two situations where wear is
i)Desirable = ii)Undesirable
State and explain the Bowden Tabor’s theory of Friction.
Write short notes on
i)Friction of metals ii)Friction of ceramics
State Amonton’s laws of friction.
PART ‏تا‎
‎Answer any three full questions, each carries 10 marks.
Explain the mechanism behind adhesive wear.
Derive an equation for abrasive wear model.
What are the different methods used for wear measurement. Explain any three.
Explain the role of lubricant in rolling and forging.

What is Newtonian and non-Newtonian fluid?

Write any five additives for developing a good lubricant. Explain them in detail.

Explain what is boundary lubrication.

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Duration: 3 Hours

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