B.TechSemester 62023-24TribologyKME063
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Tribology (KME063) - AKTU Question Paper 2023-24

B.Tech · Semester 6 · Free PDF Download

This is the official AKTU Tribology Previous Year Question Paper for B.Tech Semester 6, academic session 2023-24. Published by Dr. A.P.J. Abdul Kalam Technical University (AKTU/UPTU), Lucknow. Free PDF download — no login required.

Course:B.Tech
Semester:Semester 6
Session:2023-24
University:AKTU / UPTU

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Questions Asked in 2023-24

Tribology (KME063) — complete question paper · 100 marks · 3 Hours

Section AAttempt all q u e s t i o n s i n b r i e f . 2 x 1 0 = 2 0
  • a
    Define the term ‘Tribology’. 02
  • b
    State the functions of lubricants. 02
  • c
    What are the causes of friction? 02
  • d
    What do you understand by fatigue wear? 02
  • e
    Describe jet lubrication. 02
  • f
    Explain elasto‐hydrodynamic lubrication. 02
  • g
    What are the solid lubricants? 02
  • h
    What are the characteristics of wear resistant coatings. 02 i. Describe the term friction stability. 02 j. What do you understand by hysteresis losses. 02
Section BAttempt any three o f t h e f o l l o w i n g : 3 x 1 0 = 3 0
  • a
    How can lubricants be classi fied? Briefly explain each. 10
  • b
    Explain the adhesion theory o f friction with neat diagram. 1 0
  • c
    Explain the theory of hydrodynamic lubrication with neat ske tch. 10
  • d
    Explain the properties of solid lubricants. 10
  • e
    Explain the concept of friction angle in detail. 10
Section CAttempt any one p a r t o f t h e f o l l o w i n g : 1 x 1 0 = 1 0
  • a
    Explain the different lubrication regimes in detail with nea t sketch. 10
  • b
    What do you understand by Visco sity? Explain any one of the methods to measure viscosity
  • a
    List and briefly describe the types of wear encountered in e ngineering practice. 10
  • b
    Describe the different approaches to friction control and we ar prevention. 10
  • a
    Explain the concept of journal bearing. Describe the formula e for the minimum oil film thickness for this bearing
  • b
    Describe this term in detail: (i) Hydrostatic lubrication, (ii) Squeeze film lubrication. 10
  • a
    Explain the different techniques for producing wear resistan t coatings, 10
  • b
    Describe the friction and wear characteristics of lamellar solids. 10
  • a
    Derive the maximum efficiency formulae for a screw having square thread. 10
  • b
    Determine the necessary weight of each shoe of the centrifug al friction clutch if 30 kW is to be transmitted at 750 r.p.m., with the engagement beginning at 75 percent of the running speed. The inside diameter of the drum is 300 mm and the radial distance of the centre of gravity of each shoe from the shaft is 126 mm. Assume a coefficient of friction of 0.25

Question text is extracted from the official AKTU question paper PDF above. Hindi translations are omitted — every question is printed in English in the original paper. Last verified: 2026-08-23.

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