Hall Ticket No Question Paper Code: BCC201
INSTITUTE OF AERONAUTICAL ENGINEERING
(Autonomous)
M.Tech I Semester End Examinations (Supplementary) January, 2019
Regulation: IARE-R16
PRECISION ENGINEERING
Time: 3 Hours (CAD/CAM) Max Marks: 70
Answer ONE Question from each Unit
All Questions Carry Equal Marks
All parts of the question must be answered in one place only
UNIT I
1. A steel shaft is made within limits on its diameter of 60.02mm and 59.96mm. State the upper
and lower limits of the bore size of a bush to give a maximum clearance of 0.10mm and minimum
clearance of 0.02mm.
Define the following
i. Clearance fit.
ii. Tolerance.
iii. Basic fit.
2. Discuss different errors produced due to numerical interpolation displacement measuring system.

With neat sketch explain the construction of main spindle for machine tool.
UNIT II
3. Give a brief classification of datum system? Explain two and three mutually perpendicular
grouped datum planes.
Discuss the steps involved in computation of rotational accuracy.
4. With the help of a neat sketch explain grouped data system with spigot and recess.
Define the following terms
i. Datum triangle.
ii. Datum letter
iii. Datum feature
UNIT III
5. Discuss the relation between tolerance grades and machining process.
Briefly discuss cumulative effect of tolerance.
6. With suitable example explain geometric tolerance frame.
Write short notes on
i. Surface finish
ii. Process capability
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UNIT IV
7. Discuss the tolerance chart for manufacturing shaft and hole type component.
Explain manufacturing consideration in component design
8. Write short notes on the following
i. Tolerance work sheet
ii. Datum features.
Briefly explain design features to facilitate machining.
UNIT V
9. Explain the working of Michelson interferometer.
What is CMM. Explain the working of coordinate measuring machine with a neat sketch.
10. List out different types of optical and mechanical measuring system.
Discuss the application of laser optical measuring system
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