Reg No.:_ Name:

FIFTH SEMESTER B.TECH DEGREE EXAMINATION(R&S), DECEMBER 2019

Max. Marks: 100

b)

0)

0)

0)
௦)

b)
0)

0)

0)
௦)

b)

b)

E192110 Pages:2

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY

Course Code: ME369
Course Name: TRIBOLOGY

PARTA
Answer any three full questions, each carries 10 marks.
Write short notes on Jost’s Report.
With the help of a neat sketch differentiate between real and apparent area of
contact.
What is meant by Elastic Half Space?
What are the classification of a Bearing? Explain each with examples.
Compare Sliding and Rolling contact bearings.
What are the classifications of Friction?
What are the exceptions to the Laws of Friction?
Explain the modern Bowden-Tabor theory of Friction.
List out three situations where friction is desirable.
With the help of a neat sketch explain Stick Slip Phenomenon.
What are the methods to reduce Ploughing Component?
PART 13
Answer any three full questions, each carries 10 marks.
What are the classification of wear processes? Explain with example.

Explain the mechanism of sliding wear.

Write short notes on wear of metals

Expalin the mechanism of abrasive wear

Write any two methods to measure wear.

Write short notes on viscosity and viscosity index.

Differentiate journal bearing and thrust bearings with the help of neat sketches.
Write short notes on lubricating oil additives with examples

Explain Mixed and Hydrodynamic lubrication regimes with the help of stribeck

curve

Page 1 of 2

Duration: 3 Hours

Marks

(4)
(4)

(2)
(8)
(2)
(2)
(3)
(5)
(3)
(5)
(2)

(5)
(5)
(3)
(5)
(2)
(5)
(5)
(6)
(4)