Question Code: 607

Subject Code and Name: 32233, Engineering Metrology. PART-A

1. Define sensitivity

It is defined as the quotient of the increase in observed value (indicated by

pointer and scale) and the corresponding increase in the measured quantity.

2. What are radius gauges?

3. What is the use of angle gauges?

4. What is master gear?

5. Define straightness

6. Give any to uses of CMM

7. What is ovality?

Difference between major axis and minor axis

8. What are comparators?

Mechanical comparator

Optical comparator

Electrical comparator

Pneumatic comparator

Fluid displacement comparator

PART-B

9. What do you mean by vernier scale?

10. How to use Keilpart gauge?

11. Describe about sine bars.

12 Draw and name the parts of gear tooth vernier caliper.

13 How to measure parallelism?

14. Describe about interference of two rays.

15. Describe about in-process probing.

16. Write about surface finish parameters.

Effective surface

Nominal surface

Surface roughness average

Primary texture

PART-C

17.(a) Explain: (i) Precision Vs Accuracy (ii) V blocks.

(or)

(b) List out the types of vernier caliper. Explain any one type with sketch.

Type A-having external and internal measurement’s jaws

Type-B - having external and internal measurement’s jaws in same side

Type-C used both marking and measuring

18 (a) Explain about optical bevel protractor.

(or)

(b) Explain about angle dekkor in detail.

19.(a) Explain about flatness testing procedure in detail.

(or)

(b) Explain any one method of surface inspection by direct measurement method.

20.(a) Explain about mechanical comparators with diagram.

20.

(or)

(b) How to calibrate linear measuring instrument? Explain.

21. (a) Explain about optical projector in detail.

(or)

(b) Explain (i) isometric viewing of surface defects (ii) Computers aided dimensional analysis.

Prepared by,

S.Rajendran,

Lecturer,

Institute of Tool engineering,

Dindigul.