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

Roll No.

Total No. of Pages : 02

Total No. of Questions: 18

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B.Tech. (ME) (2012 Onwards E-II) (Sem.-7)

INDUSTRIAL TRIBOLOGY

Subject Code : DE/ME-3.6

M.Code: 72022

Time: 3 Hrs.

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Max. Marks: 60

INSTRUCTIONS TO CANDIDATES :

1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.

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SECTION-A

Answer briefly :

1. List different tribological considerations.
2. Define Friction.
3. What is the need of lubrication?

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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.

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9. Define Viscosity.
10. What is tribological surface?

SECTION-B

11. State and explain adhesion theory.
12. Explain how measurement of friction is done?

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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.

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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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