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Posted By: Sra1 Member Level: Gold Posted Date: 02 Jun 2008
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2008 Jawaharlal Nehru Technological University Mechanical Engineering INSTRUMENTATION AND CONTROL SYSTEMS(II B.Tech II Semester Supplimentary Examinations, Apr/May 2008) Question paper
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Set No 1
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II B.Tech II Semester Supplimentary Examinations, Apr/May 2008
INSTRUMENTATION AND CONTROL SYSTEMS
( Common to Mechanical Engineering, Production Engineering and
Automobile Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
* * * * *
1. (a) Discuss briefly on the reliability of measurement systems. Explain how reliability improvement can be achieved.
(b) “A pricise instrument need not be accurate” explain. [8+8]
2. (a) Give the classification of inductive transducers indicating their principle.
(b) Describe in detail the construction and working of an inductive and a capacitive transducers to measure linear displacement. [6+10]
3. With neat diagrams explain the construction, working principle of different types of pressure thermometers, compare them. [16]
4. (a) With the aid of neat sketch, explain the working principle of dead - weight type tester.
(b) Discuss various types of elastic pressure sensing elements used in electrical transducers. [16]
5. (a) List out the advantages and limitations of direct method of level measurement.
(b) Describe with neat sketch the functioning of any two types of displacer type liquid level measuring instruments. [16]
6. (a) Explain the principle of a hydrometer.
(b) What is a vibrometer? Explain any one of them. [16]
7. (a) Describe the properties of materials used for strain gauges.
(b) Draw a simple strain gauge element and mark active and inactive direction
(c) Explain the two arm and four arm conditions used for strain measurement. [4+4+8]
8. (a) Briefly explain the different types of control systems.
(b) Describe the working of one automatic control system used in practice, outline functional elements of that system. [8+8]
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