PES INSTITUTE OF TECHNOLOGY

Bangalore, South Campus

DEPARTMENT OF MECHANICAL ENGINEERING

QUESTION BANK

SUBJECT : Mechanical Measurements And Metrology

SUBJECT CODE : 15ME46B I.A MARKS: 25

FACULTY NAME : MM /VR/ CM

Unit 1 - Standards of Measurements

1. Define metrology as applied to engineering industry.

2. What is the role of standards

3. Explain international prototype meter & imperial meter yard with a neat sketch

4. What are airy points

5. Discuss Line Standard, Wavelength & End Standard

6. Explain with illustrations how end standards can be derived from end standards

7. Write a note on Johanssons gauges with sketch

8. Explain wringing phenomenon of slip gauges & breaking of a stack of slip gauges

9. Give the details M87 & M45 set of slip gauges 10. Write a note on manufacture of

slip gauges.

Unit 2 - System of Limits, Fits, Tolerance and Gauging

1. Why it is necessary to give tolerance on engineering dimension

2. Define limits, fits, tolerance, fundamental deviation, basic shaft & basic hole

3. Differentiate between unilateral & bilateral tolerances. Why unilateral is preferred

over bilateral tolerance

4. Explain compound & accumulation tolerances with a neat sketch

5. Differentiate between interchangeability & selective assembly

6. List & explain different classes of fits as per BIS

7. Discuss hole based & shaft based system of fits. Which is more preferable and why

8. Explain GO-NOGO gauges & how Taylors principle is used in designing them

9. What are essential consideration in selection of material for gauges and list them

10. Explain Taylor principle for design of limit gauges