PART-A(10 x 2 = 20 Marks)
1. What is legal metrology?
2. What is the relationship between sensitivity and range?
3. What are the advantages of mechanical comparator?
4. State the working principle of an electronics comparator?
5. Mention any four types of CMM.
6. What are the advantages of laser interferometer?
7. What are the various method used for measuring the gear tooth thickness?
 8. How Taylor’s principle is applied to screw thread gauge?
9. Give the classification of temperature measuring instrument
10. What are the physical characteristics of temperature measuring sensor?

                                               PART-B (5×16=80 Marks)

11. (a) draw  the block diagram of generalized measurement system and explain the different stages with      
            example. (16)
(or)
      (b).Discuss the different types of errors and how they can be eliminated? (16)
12. (a) Discuss the working principle advantages and disadvantages of optical comparators? (16)
(or)
        (b)Explain with the help of neat sketches the principle and construction of an auto-collimator. (16)
13 (a) with a neat sketch explain the working of AC laser interferometer. (16)
(or)
      (b) Explain neat sketch explain the various types of CMM based on its construction. (16)
14.(a)explain CLA,RMS,Ten point height methods for assessment of average roughness. (16)
(or)
      (b) Explainthe following errorin threadbriefly. (16)
15. (a )Explain the method of measuring force using a strain gauge load cell. (16)
(or)

     (b) What is a dynamometer? Explain its types and working. (16)