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2003 Course Tribology (Elective II)

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Total No. of Questions : 12] [Total No. of Pages :4 [3864] - 155 B.E. (Mechanical S/W) TRIBOLOGY (2003 Course) ( Elective - II ) ( 402063 ) P1141 Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates: 1) 2) 3) 4) 5) 6) Answer 03 questions from section I and 03 questions from section II. Answers to the two sections should be written in separate books. Neat diagrams must be drawn wherever necessary. Figures to the right indicate full marks. Use of logarithmic tables, slide rule, mollier charts, electronic pocket calculator and steam tables is allowed. Assume suitable data, if necessary. SECTION - I UNIT - I Q1) a) b) c) Q2) a) What are the different parameters which affect viscosity of oil? Discuss in brief . [6] State physical and chemical properties of Lubricants. [4] An Oil of viscosity of 50 cP and relative density of 0.9 is used for Lubrication convert the viscosity into Centistokes, SUS and Pascal second units. [6] OR Explain modes of Lubrication. [6] b) What is role of additives in lubrication? What are different additives used in lubricating oils? [4] c) Discuss in brief the role of tribology in industry. [6] UNIT - II Q3) a) b) c) Derive Archard s equation for volume of adhesive wear with assumptions made. State Laws of wear using above equation. [8] Explain Ferrography technique for measurement of wear. [4] Enumerate the factors affecting wear. [4] OR P.T.O.

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