Tribology (KME063) - AKTU Question Paper 2021-22
B.Tech · Semester 6 · Free PDF Download
This is the official AKTU Tribology Previous Year Question Paper for B.Tech Semester 6, academic session 2021-22. 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:2021-22
University:AKTU / UPTU
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Questions Asked in 2021-22
Tribology (KME063) — complete question paper
Section AAttempt all q u e s t i o n s i n b r i e f . 2 x 10 = 20
- aExplain the Industrial im portance of tribology
- bDefine friction, What are di fferent types of friction
- cExplain delamination theory of wear in brief
- dDiscuss major propertie s of ideal lubricant
- eHow viscosity can be measured?
- fExplain in brief hysteresis losses
- gWhat do you mean surface engineering?
- hExplain difference between lin e contact lubrication and point contact lubrication. i. What are the advantages and di sadvantages of bearing material explain in brief? j. Write down difference between c one clutch and centrifugal clutch
Section BAttempt any three o f t h e f o l l o w i n g : 10x3=30
- aWhat are the different methods of measuring frictional force? Explain any one
- bDerive Petroff’s eqation for lightly loaded journal bearing state assumptions
- cDefine viscosity define and sta te Newton’s law of viscosity, with a neat sketch
- dExplain construction and opera ting principle of Falling sphe re viscometer and Flower’s viscometer, with neat sketches
- eExplain Bowden and Tabor’s A dhesion theory of friction
Section CAttempt any one p a r t o f t h e f o l l o w i n g : 10x1=10
- aExplain in brief any five comm on surface hardening processes
- bExplain the basic requirements to be satisfied by any compon ent for selection of a particular surface coating
- aList out wear mechanism . Explain any one wear mechanism
- bList out various wear testi ng methods clearly, mentioning their standards
- aList the characteristics of bearing materials, explain any two
- bDetermine the common bearing alloys. Explain any two alloys
- aDerive an expression for hydr ostatic step bearing pressure distribution
- bA hydrostatic step bearing has th e following specifications: Diameter of the shaft = 152 mm Diameter of the pocket = 102 mm Vertical thrust on the bearing =65000 N External pressure = 0 Shaft speed = 900 rpm Viscosity of lubricant = 24.15 CP Oil film thickness = 0.127 mm Find (i) Supply pressure (ii) Quantity of oil flow (iii) Power loss in the bearing (iv) Frictional force (v) Co-efficient of friction
- aDerive an expression for load carrying capacity of a plane s lider bearing with a fixed shoe
- bA slider bearing has a pivoted shoe by the following data: Length of the shoe in the direction of motion = 50 mm Width of the shoe = 64 mm Slider velocity = 5.5 m/s Load on the bearing = 8025 N Viscosity of the lubricant = 31cp Determine minimum oil film thickness, power loss and coefficien t of friction of bearing, The inclination of the surface corresponds to minimum co-efficient of friction?
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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