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Metrology: Design of Gauges
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Metrology: Design of Gauges
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25 Questions

1. What is the principle of ‘The Johansson Mikrokator’?
2. Which of the following material is not used for rubbing on the surface to be inspected in scratch inspection?
3. Upto which limits irregularities can be detected with touch inspection of a surface?
4. What is the order of magnification in flow type pneumatic gauge?
5. Which of the following is true for measurement of surface roughness?
6. Which of the following is necessary for the complete study of surface roughness?
7. Which principle is related to Gauge design?
8. What is the formula for overall magnification of pneumatic comparator? (Where, λ is the length of scale of pressure measuring device and La is the average separation between nozzle surface and surface to be gauged)
9. Which of the following is true for uses of comparators?
10. Which of the following is true for quartz flats?
11. What are the functional dimensions?
12. What is the importance of the valley in any irregular surface?
13. What is the relation between overall magnification and pneumatic sensitivity in pneumatic comparators?
14. Which of the following is true for plug gauges?
15. Which of the following is the incorrect condition for a perfectly flat surface when tested for interferometry?
16. ‘Go limit’ applied to which limit condition?
17. What is mean clearance?
18. Which of the following is the best for the examination of surface finish?
19. Under which group, does waviness in surface falls?
20. How much a stylus instrument can be magnified to plot or find minute irregularities?
21. From which category ‘Sigma comparator’ belongs?
22. Which of the following is true for ’Cross strip’ in sigma comparator?
23. Which of the following is not correct for pneumatic comparator?
24. Which type of tolerance provided in drilling mostly?
25. If the angle at which bands are viewed is 30o in flatness testing with interferometry, what is the possible error?

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