ME 6503 METROLOGY AND QUALITY ASSURANCE, Third year, Department of Mechanical Sandwich Engineering, Model Exam Questions

Answer ALL questions

PART A – (10×2=20 marks)

1. Write basic principle of Lot sampling?
2. Define metrology?
3. List out needs of measurement?
4. Define Abbes principle?
5. Explain addendum and dedendum of screw thread?
6. Define Pressure angle of a gear?
7. Write down types of gears?
8. What is clean room environment?
9. Write down difference between accuracy and repeatability?
10. Define Taylor’s principle?

PART B

6.   a) Define Interferometry and Holography?                                              (16 mark)

OR

     b) Explain ISO quality standards with its elements?                                   (16 mark)

7.  a) Explain Comparators Types and surface plate ?                                      (16 mark)

OR

    b) Write about Types of Plug gauges and Tomilson Surface meter?             (16 mark)

9. a) Write about Base pitch measurement with neat sketch and Master gear? (16 mark)

OR

    b) Write about One wire method and Screw thread micrometer with neat sketch? (16 mark)

9. a) Explain process capability and components of OC curve?                                  (16 mark)

OR

    b. 1. The following table shows the number of defects observed on 25 similar big castings,

           Find C and compute the trial control limits. What value of C can suggest for subsequent period?    

   

  (8 mark)        

      2.   What is sampling inspection?                                                                             (8mark)                                                                                                                                                                                                                                                                      

10. a) Explain about erection of equipments and testing procedure for lathe?           (16 mark)        

OR

     b) 1. Write down protocol for repair and testing?                                                  (8mark)                                                                                                                                                                                                                                                                      

         2.  List down Inspection checklist?                                                                   (8mark)