Name of the College : Sphoorthy Engineering College
University : JNTUH
Department : Mechanical Engineering
Subject Code/Name : 09A50302/METROLOGY AND SURFACE ENGINEERING
Degree : B.Tech
Year/Sem : III/I
Website : sphoorthyengg.com
Document Type : Model Question Paper
Download Model/Sample Question Paper : https://www.pdfquestion.in/uploads/sphoorthyengg.com/4845-09A50302-METROLOGYANDSURFACEENGINEERING.pdf
Metrology & Surface Engineering Question Paper :
III B.Tech I Semester Examinations,December 2011
Time: 3 hours
Max Marks: 75
Related : Sphoorthy Engineering College 09A51401 Finite Element Techniques B.Tech Question Paper : www.pdfquestion.in/4829.html
Answer any FIVE Questions. All Questions carry equal marks :
1. Make a comparative study of CLA, RMS and Ten point height method of measurement of surface finish. With the help of an example explain the difference. [15]
2. What is the basic principle involved in ion implantation. With the help of a neat sketch explain the process. Mention the advantages and applications. [15]
3. (a) Do you think interchangeability reduces the number of rejects? Justify your answer.
(b) Differentiate between hole basis system and shaft basis system. [8+7]
4. (a) Give the broad classification of fluids and explain them briefly.
(b) State the advantages and disadvantages of chemical fluids. [7+8]
5. (a) What are the different grades of slip gauges? Explain.
(b) What are the precautions required while using slip gauges? [7+8]
6. (a) With the help of a neat sketch explain the construction of a reed type of comparator?
(b) What are the characteristics expected from a comparator? [8+7]
7. Explain the formation of interference fringes when light falls on an optical at resting on a lapped surface. What is the effect of using a monochromatic beam, instead of white light? [15]
8. (a) Explain the use of rollers and slip gauges for the measurement of minor diameter of internal threads?
(b) Explain how a thread micrometer can be used to measure effective diameter of a thread. What are the advantages and limitations? [7+8]
Code No: 09A50302
R09 Set No. 4
1. (a) Give the complete classification of taper gauges.
(b) Explain the construction and working of optical bevel protractor. [7+8]
2. List out various compounds used in abrasive finishing. Explain their features and functions. [15]
3. List out the process variables of electroplating and explain their influence on the quality of the product. [15]
4. (a) Explain the need for limit system.
(b) With the help of suitable diagrams explain minimum and maximum metal condition of shaft and hole. [7+8]
5. With the help of a neat sketch explain the construction, working advantages, limitations and applications of pneumatic comparator. [15]
6. (a) Explain the procedure of use of straight edges to check straightness.
(b) Explain the concept of reference plane. [8+7]
7. How CLA index number is determined? Explain why CLA index number alone is not sufficient to specify the surface texture required and to make the information complete, what else is to be specified? How the required texture is specified in the drawing? [15]
8. Explain the measurement of the ank angle of external threads by optical projectors. [15]
III B.Tech I Semester Examinations,December 2011 :
Metrology And Surface Engineering :
1. (a) Explain the nomenclature of screw thread with the help of a neat sketch.
(b) Discuss the various types of pitch errors along with their causes and effects. [7+8]
2. Describe the principal features of International standard system of limits and ts for screwed work. [15]
3. (a) Explain the construction and working of a Profilograph for surface roughness measurement?
(b) Explain the following terms?
i. Roughness
ii. Waviness
iii. lay. [7+8]
4. What are the different types of surface contaminants generally observed? What are their sources? Explain them in detail. [15]
5. (a) Explain the reason why surface treatment of manufactured products may be necessary.
(b) Explain the process of roller burnishing. [8+7]
6. Explain comparative methods of testing straightness of geometrical form. [15]
7. How do you measure external dovetail, internal dovetail and angle of dovetail with the help of precision balls and rollers? [15]
8. (a) Why damping is essential in mechanical comparators? How it is achieved in sigma comparator?
(b) What are the advantages, uses and disadvantages of electrical comparators?