B.TECH - Semester 6 metrology and instrumentation Question Paper 2013 (apr)
Practice authentic previous year university questions for better exam preparation.
- (a) With the help of neat sketches. Explain How an unknown angle can be measured using a sine bar? What are the sources of errors in sine bars? 10
- (b) Explain the working of a universal bevel protractor with neat sketch. 10
- (a) Draw the block diagram of generalized measurement system and explain different stages with examples.
- (b) Explain the process of calibration of instruments.
- (a) Explain the classification of tolerances in detail with examples.
- (b) Explain different types of fits with neat sketch.
- (a) A clearance fit has to be provided for a shaft and bearing assembly having a diameter of 40 mm . Tolerances on hole and shaft are 0.006 and 0.004 mm , respectively. The tolerances are disposed unilaterally. If an allowance of 0.002 mm is provided, find the limits of size for hole and shaft when
- (i) hole basis system and (ii) shaft basis system are used.
- (b) Explain the classification of gauges.
- What are the different types of standards in measurement?
- What are the limitations of Sine bar?
- List any four characteristics of end standards.
- State the Taylor's principle of gauge design.
- Differentiate between tolerance and allowance with example.
- List the advantages of electronic comparators.
- List the required properties of gauge materials.
- Define the terms roughness, waviness, lay and flaws.
- What is meant by CMM?
- Explain the difference between static and dynamic characteristics of transducers. ( $10 \times 2=20$ Marks) Answer one full question from each Module. Each carries 20 marks
- (a) Explain the construction and working of Sigma mechanical comparator with 10 a neat sketch.
- (b) With a neat sketch, explain the construction of angle dekkor. What are its 10 applications?
- (a) Explain the working of Taylor-Hobson Talysurf with a neat sketch. ..... 10
- (b) Explain briefly the principle of optical flat with neat sketch. ..... 10 Module - IV
- (a) Compare the characteristics of systematic error and random error. ..... 10
- (b) Explain the working of Electrical dynamometer with neat sketch. ..... 10 OR
- (a) Explain the construction and working principle of coordinate measuringmachine.10
- (b) Explain the working principle of an electrical s10 $$ (4 \times 20=80 \text { Marks }) $$
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