Code No: V3213
R07
Set No: 1
III B.Tech. II Semester Supplementary Examinations, January - 2014
METROLOGY AND SURFACE ENGINEERING
(Mechanical Engineering)
Time: 3 Hours
Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
**
1.
a) Describe in detail about the types of fits with neat sketch.
b) Explain about various types assemblies and advantages of each assembly.
[8M]
[8M]
2.
With neat sketches explain about
a) Depth micrometer
b) Bevel protractor
[8M]
[8M]
3.
List out various types of interferometers and briefly describe any two of them.
[16M]
4.
Describe the following surface roughness measurement systems
a) Surface inspection of comparison method
b) Direct instrument systems
[8M]
[8M]
5.
Describe with neat sketches, any two measuring instruments for the measurement of screw
thread.
[16M]
6.
In certain cases the permitted errors machine tool alignment is unilateral only. Explain why?
Enumerate three examples with reasons for unilateral tolerances?
[16M]
7.
a) Describe the determination of the accuracy of a gear tooth vernier caliper ? what is the
expected order of accuracy of this instrument?
[8M]
b) What are the elements of gears which are checked for accuracy?
[8M]
8.
Explain the following degreasing techniques
a) vapour degreasing
b) Ultrasonic degreasing
[8M]
[8M]
**
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Code No: V3213
R07
Set No: 2
III B.Tech. II Semester Supplementary Examinations, January - 2014
METROLOGY AND SURFACE ENGINEERING
(Mechanical Engineering)
Time: 3 Hours
Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
**
1. a) Explain the various types of standards with their letter symbols for tolerances.
[8M]
b) Describe in detail about writing tolerances with neat sketches?
[8M]
2.
a) Discuss in detail about various types of dial indicators with neat sketches?
[8M]
b) With neat sketches explain about plug and ring gauges for GO gauge & NO GO Gauge
systems?
[8M]
3.
What are the most common aberrations found in optical projectors? Explain how they are
used.
[16M]
4.
Discuss in detail about Tomlinson surface meter with a neat sketch.
5.
Explain about various pitch errors in gears? What are the effecting parameters for pitch
errors and explain any three of pitch errors in gears?
[16M]
6.
a) Distinguish between alignment test and performance test of machine tool.
[4M]
b) Discuss with neat sketches how you would test the Spindle Centre run-out and Chuck-run
out?
[12M]
7.
Explain the following gear accuracy systems.
a) Kinematic accuracy.
b) Tooth bearing contact.
8.
Describe the flame spraying coating process with a neat sketch.
**
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[16M]
[8M]
[8M]
[16M]
Code No: V3213
R07
Set No: 3
III B.Tech. II Semester Supplementary Examinations, January - 2014
METROLOGY AND SURFACE ENGINEERING
(Mechanical Engineering)
Time: 3 Hours
Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
**
1.
2.
a) Explain about Hole and Shaft basis system with neat sketches.
[8M]
b) Discuss in detail about difference between tolerance and allowance of limit systems
[8M]
a) Explain about calibration process with slip gauges using different grades and sets
available in slip gauges.
[8M]
b) With a neat sketch explain the determination of the included angles using sine bar and
give the applications of sine bar.
[8M]
3.
Explain about Tool maker’s microscope with a neat sketch and give its applications. [16M]
4.
Explain the following analysis of surface traces
a) Maximum peak to valley height of roughness
b) Center line average method
[8M]
[8M]
Discuss in detail the following effective diameter measurement methods:
a) Thread micro meter method
b) One-wire method
[8M]
[8M]
5.
6.
Describe two methods of testing a center lathe for accuracy of facing? Why must the surface
generated not be convex?
[16M]
7.
a) Describe gear tooth vernier caliper and explain how is it used to check gears.
b) Calculate the settings for a straight spur gear having 50 teeth of module 3mm.
[8M]
[8M]
8.
a) What is surface coating? Why is it provided on various products?
b) Briefly explain about Plasma Spraying.
[8M]
[8M]
**
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Code No: V3213
R07
Set No: 4
III B.Tech. II Semester Supplementary Examinations, January - 2014
METROLOGY AND SURFACE ENGINEERING
(Mechanical Engineering)
Time: 3 Hours
Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
**
1. a) Explain the effect of engineering allowance on the different types of fits required in
engineering manufacture.
[8M]
b) Discuss the effect of temperature on tolerance limits and what precautions are required
during measurements.
[8M]
2. a) Classify and explain plain limit gauges.
b) Sketch and explain about four types of plug gauges.
[8M]
[8M]
3. Explain about optical flats and describe the monochromatic light wave interference
method in metrology?
[16M]
4. Why the assessment of surface texture is is important? Describe the two methods to
obtain a numerical value of the texture from a given graphical method.
[16M]
5. a) How would you check the accuracy of pitch of a plug screw gauge? Explain. [8M]
b) How the thread form can be checked and flank angle of internal thread measured?
Explain.
[8M]
6. a) Distinguish between the geometric and practical tests on machine tool.
[8M]
b) What is the effect upon the work if the centre tee-slot of a horizontal milling machine
is not square with the spindle axis?
[8M]
7. Describe the spur gears with reference to
a) Lead
b) Module
[8M]
[8M]
8. a) It is necessary to clean the surface before providing coating on it. Explain why? [8M]
b) Classify and briefly describe various mechanical cleaning processes?
[8M]
**
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