JNTU Kakinada B-Tech 3-2 PT32031/R13 I METROLOGY R13 April 2018 Question Paper

Code No: PT32031/R13
III B. Tech II Semester Regular/ Supplementary Examinations, April – 2018
METROLOGY (Mechanical Engineering)Time: 3 hours Max. Marks: 70
Note: 1. Question Paper consists of two parts (Part-A and Part-B) 2. Answering the question in Part-A is compulsory
3. Answer any THREE Questions from Part-B
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PART ?A
1 a) Write about interchangeability? [3M]
b) Write the importance of profile and position gauges. [4M]
c) What are the applications of interferometer? [4M]
d) What are the various factors influencing surface finish? [4M]
e) What are the different elements of a screw thread? [3M]
f) What is meant by an alignment test on machine tools? [4M]
PART -B
2 a) Describe about nominal size, limits and deviations? [8M]
b) Explain International standard system of tolerances?
[8M]
3 a) Explain the manufacturing method for slip gauges and how they calibrated? [8M]
b) List various angle measurement instruments. Describe the working principle of
Bevel protractor?
[8M]
4 a) Describe the working principle and applications of optical projector and optical
flats
[8M]
b) Explain about NPL gauge interferometer with neat diagram?
[8M]
5 a) How are R
a
and RMS values of surface finish of a surface assessed? Explain
with diagrams?
[6M]
b) What are the salient features of a pneumatic comparator? Describe pneumatic
comparator with a neat sketch and write its uses?
[10M]
6 a) Discuss various types of errors in Gear measurement? [8M]
b) Derive an equation for effective diameter of a screw thread?
[8M]
7 a) Describe the measurement of flatness of surfaces using surface plates? [8M]
b) Explain the alignment test for drilling machine. [8M]
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RA
SET – 1