Download PTU B.Tech 2021 Jan ME 7th Sem 72022 Industrial Tribology Question Paper

Download PTU (Punjab Technical University) B.Tech (Bachelor of Technology) / BE (Bachelor of Engineering) 2021 January ME 7th Sem 72022 Industrial Tribology Previous Question Paper

Roll No.
Total No. of Pages : 02
Total No. of Questions : 18
B.Tech. (ME) (2012 Onwards E-II) (Sem.?7)
INDUSTRIAL TRIBOLOGY
Subject Code : DE/ME-3.6
M.Code : 72022
Time : 3 Hrs. Max. Marks : 60
INST RUCT IONS T O CANDIDAT ES :
1 .
SECT ION-A is COMPULSORY cons is ting of TEN questions carrying TWO marks
each.
2 .
SECT ION-B c ontains F IVE questions c arrying FIVE marks eac h and s tud ents
have to atte mpt any FOUR q ues tions.
3 .
SECT ION-C contains THREE questions carrying T EN marks e ach and s tudents
have to atte mpt any T WO questio ns.
SECTION-A
Answer briefly :
1.
List different tribological considerations.
2.
Define Friction.
3.
What is the need of lubrication?
4.
Write the functions of lubricant additives.
5.
What is filtration?
6.
What are solid lubricants?
7.
What is the need of pre-loading?
8.
List the materials used for porous bearings.
9.
Define Viscosity.
10. What is tribological surface?
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SECTION-B
11. State and explain adhesion theory.
12. Explain how measurement of friction is done?
13. Explain the mechanism of wear.
14. State various types of lubricants and their industrial applications.
15. Define and explain: viscosity index and kinematic viscosity.
SECTION-C
16. Explain the procedure of diagnostic maintenance of tribological components.
17. Explain the mechanism of rolling friction and compare it with sliding friction.
18. Discuss the role of eccentricity in hydrodynamic lubrication of journal bearing.
NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any
page of Answer Sheet will lead to UMC against the Student.
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