Important RGPV Question
ME 802 (B) Tribology And Maintenance Engineering
VIII Sem, ME
UNIT 1- Introduction, History Of Tribology
Q.1) What are the historical developments and industrial significance of tribology?
(RGPV May 2023)
Q.2) Differentiate between conforming and non-conforming contact.
(RGPV May 2023)
Q.3) Explain Stick slip phenomenon.
(RGPV May 2023)
Q.4) What is meant by Elastic half spheres?
(RGPV May 2023)
Q.5) List the assumptions in the Hertzian analysis of contact between surfaces.
(RGPV May 2023)
Q.6) What do you mean by viscoelastic behaviour of material?
(RGPV Dec 2020)
Q.7) Discuss in details various tribo-models for asperity contact.
(RGPV Dec 2020)
Q.8) Explain Tribo surface preparation concepts. Give brief overview of Tribology.
(RGPV June 2020)
Q.9) Explain Hertz contact stresses, residual stresses, surface fatigue, and creep concepts.
(RGPV June 2020)
UNIT 2- Friction, Laws Of Friction, Rolling/Sliding Friction
Q.1) What are the laws of friction and explain the exceptions of these laws?
(RGPV May 2023)
Q.2) Explain Bowden Tabor’s theory of friction.
(RGPV May 2023)
Q.3) Explain any two factors affecting friction.
(RGPV May 2023)
Q.4) How to reduce adhesive component of friction?
(RGPV May 2023)
Q.5) List out any three friction measuring equipment. Explain any one of the methods in detail.
(RGPV May 2023)
Q.6) State Amonton’s laws of friction.
(RGPV May 2023)
Q.7) What is rolling friction? Explain.
(RGPV Dec 2020)
Q.8) What is the role of friction in Tribology?
(RGPV Dec 2020)
Q.9) Discuss Molecular mechanical theory of Friction.
(RGPV June 2020)
Q.10) How Friction devices are designed? Give an example and explain.
(RGPV June 2020)
UNIT 3- Wear, Different Types Of Wear Mechanisms
Q.1) Define wear and explain any two types of wear.
(RGPV May 2023)
Q.2) Mention any five factors affecting wear and explain them.
(RGPV May 2023)
Q.3) The flat face of a brass annulus having an outside diameter of 20 mm and an inside diameter of 10 mm is placed on a flat carbon steel plate under a normal load of 10 N and rotates about its axis at 100 rpm for 100 h. As a result of wear during the test, the mass losses of the brass and steel are 20 mg and 1 mg, respectively. Calculate the wear coefficients and wear depths for the bronze and the steel. (Hardness of steel = 2.5 GPa, density of steel = 7.8 Mg/m3, hardness of brass = 0.8 GPa and density of brass = 7.5 Mg/m3).
(RGPV Dec 2020)
Q.4) Explain different wear mechanisms. How wear is prevented?
(RGPV June 2020)
UNIT 4- Lubrication, Lubricants And Additives, Composition
Q.1) Explain the classification of bearing based on the applied load.
(RGPV May 2023)
Q.2) Explain different types of bearing based on film thickness.
(RGPV May 2023)
Q.3) What are the advantages and disadvantages of cylindrical roller bearings?
(RGPV May 2023)
Q.4) Explain hydrodynamic and elastro-dynamic lubrication.
(RGPV May 2023)
Q.5) Discuss lubrication requirements of a two wheelers.
(RGPV Dec 2020)
Q.6) Discuss desirable properties of good lubricant.
(RGPV Dec 2020)
Q.7) What is DIN standards?
(RGPV Dec 2020)
Q.8) Write technical regulations of Lubricants. Discuss boundary/ mixed and fluid thin film lubrication.
(RGPV June 2020)
UNIT 5- Nano Tribology, Instrumental Tests
Q.1) Describe the Physical vapour deposition technique with the help of a sketch.
(RGPV May 2023)
Q.2) What is meant by electro plating?
(RGPV May 2023)
Q.3) Explain its three advantages and three disadvantages of electroplating method.
(RGPV May 2023)
Q.4) Explain any five micro structural treatments.
(RGPV May 2023)
Q.5) Explain any three geometrical parameters of coating.
(RGPV May 2023)
Q.6) Describe the hard facing coating technique with the help of a sketch.
(RGPV May 2023)
Q.7) Suggest any two methods of coating to acidic environments.
(RGPV May 2023)
Q.8) Suggest any two coating methods to improve high temperature oxidation and corrosion.
(RGPV May 2023)
Q.9) What is Nano Tribology? How it can be applied to automotive applications?
(RGPV June, Dec 2020)
Q.10) How do you distinguish between bearings from the standpoint of cooling conditions? Explain the categories with equation that are applicable under each. Define a seal. Draw the T-diagram of classification of seals. Explain the clearance seals with neat sketch.
(RGPV Dec 2020)
Q.10) Define a seal. Draw the T-diagram of classification of seals. Explain the clearance seals with neat sketch.
(RGPV Dec 2020)
Extra Questions-
Q.1) Explain any two of the following in brief.
i) Stick – slip characteristics of friction.
ii) Interface temperature.
iii) Plastic behaviour of material
(RGPV Dec 2020)
Q.2) Write short note on followings
a) Wear and Chemistry of lubricants
b) Specifications of lubricants
c) Viscoelastic and plastic behavior of materials
(RGPV June 2020)
— Best of Luck for Exam —
