FirstRanker Logo

FirstRanker.com - FirstRanker's Choice is a hub of Question Papers & Study Materials for B-Tech, B.E, M-Tech, MCA, M.Sc, MBBS, BDS, MBA, B.Sc, Degree, B.Sc Nursing, B-Pharmacy, D-Pharmacy, MD, Medical, Dental, Engineering students. All services of FirstRanker.com are FREE

📱

Get the MBBS Question Bank Android App

Access previous years' papers, solved question papers, notes, and more on the go!

Install From Play Store

Download JNTUA M.Tech 1st Sem 2018 Regular Feb 9D15106a Tribology Question Paper

Download JNTUA (JNTU Anantapur) M.Tech ( Master of Technology) 1st Semester 2018 Regular Feb 9D15106a Tribology Previous Question Paper

This post was last modified on 30 July 2020

This download link is referred from the post: JNTUA M.Tech 1st Sem last 10 year 2010-2020 Previous Question Papers (JNTU Anantapur)


Firstranker's choice

Code: 9D15106a

FirstRanker.com

--- Content provided by FirstRanker.com ---

M.Tech I Semester Supplementary Examinations February/March 2018

TRIBOLOGY

(Machine Design)

(For students admitted in 2012, 2013, 2014, 2015 & 2016 only)

Time: 3 hours

--- Content provided by FirstRanker.com ---

Max. Marks: 60

Answer any FIVE questions

All questions carry equal marks

  1. Write explanatory notes on:
    1. Wear of ceramic materials.
    2. Wear measurements.
    3. --- Content provided by FirstRanker.com ---

    4. Advanced material's use in tribology application.
    1. What properties are expected of bearing materials? List them.
    2. What is cubic mean load? Explain in detail the procedure involved in preloading of bearings.
    3. Write a detailed note on condition monitoring using shock pulse method.
    4. --- Content provided by FirstRanker.com ---

    1. Briefly describe the mechanism of pressure build-up in a hydrodynamic bearing with relevant figures.
    2. Derive the Reynold's equation for 3D hydrodynamic lubrication. Also state the assumptions made in this derivation.
    1. Explain the working principle of hydrostatic thrust bearing with figures.
    2. --- Content provided by FirstRanker.com ---

    3. A hydrostatic circular thrust bearing has the following data:
      Shaft diameter = 300 mm, Diameter of pocket = 200 mm, Shaft speed = 100 rpm,
      Pressure at the pocket = 500 kN/m², Film = 0.07 mm,
      Viscosity of lubricant = 0.05 PaS.
      Determine: (i) Load carrying capacity. (ii) Oil flow rate. (iii) Power loss due to friction.
    4. --- Content provided by FirstRanker.com ---

  2. Derive the equations for static load bearing capacity of a rolling element bearing. A ball bearing is operating on work cycle of 3 hours consisting of:
    1. A radial load of 3 kN at 1440 r.p.m for one quarter cycle.
    2. A radial load of 5 kN at 720 r.p.m for half cycle.
    3. A radial load of 2.5 kN at 1440 r.p.m for the remaining cycle.
    The expected life of the bearing is 10000 hours. Calculate the load carrying capacity of the bearing.
  3. --- Content provided by FirstRanker.com ---

    1. What is the role of additive lubrication? What are the additives used in lubricating oils?
    2. How rolling bearings are lubricated with grease? Discuss the factors on which the relubrication interval of a roller bearing depends.
    1. Discuss the procedure involved in the selection of mechanical seals.
    2. What are the applications of throttling bushes?
    3. --- Content provided by FirstRanker.com ---

  4. Explain the following:
    1. Failure analysis of plain bearings.
    2. Wear analysis using ferrography.

FirstRanker.com

--- Content provided by FirstRanker.com ---



This download link is referred from the post: JNTUA M.Tech 1st Sem last 10 year 2010-2020 Previous Question Papers (JNTU Anantapur)

--- Content provided by FirstRanker.com ---