Question Paper Code : B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER Third Semester. Electrical and Electronics Engineering
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1 Question Paper Code : B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER Third Semester Electrical and Electronics Engineering EE 2201/EE 33/EI 1202/10133 EE 302/ MEASUREMENTS AND INSTRUMENTATION (Regulation 2008/2010) (Common to PTEE 2201 Measurements and Instrumentation for B.E. (Part Time) Third Semester Electrical and Electronics Engineering Regulation 2009) Time : Three hours Answer ALL Questions PART A (10 x 2 = 20 marks) 1. Define the terms precision and sensitivity. Maximum : 100 marks 2. What is the significance of calibration? 3. Write any four types of analog ammeter used for instrumentation. 4. What are the different methods used for frequency measurement in power frequency range? 5. What are the applications of potentiometers? 6. What are the sources of Electromagnetic interference?
2 7. Distinguish between LED and LCD. 8. What are the functions of data logger? 9. What are the factors to be considered for selection of transducers? 10. Mention any four types of Analog to Digital convertor? PART B (5 x 16 = 80 marks) 11. (a) Describe the functional elements of an instrument with a block diagram and draw the static and dynamic characteristics. (16) 11. (b) A circuit was tuned for resonance by eight different students and the value of resonant frequency in KHz were recorded as 532, 548, 543, 535, 546, 531, 543 and 536. Calculate (i) Arithmetic mean. Deviation. (iii) Average deviation. (iv) Standard deviation. (16) 12. (a) Describe the construction and working of permanent magnet moving coil instrument. Also derive the expression for deflection. (16) 12. (b) Write short notes on : (i) Current transformer. (8) Weston frequency meter. (8)
3 13. (a) Explain how the inductance is measured in terms of known capacitance using Maxwell s bridge. Derive the conditions for balance. (16) 13. (b) Explain the following : (i) Grounding techniques. (8) Causes of Electromagnetic measurements in measurements. (8) 14. (a) With neat diagram, explain the basic components and working principle of magnetic tape recorder. (16) 14. (b) With the help of the fundamental block diagram, explain the working principle of digital storage oscilloscope, mention its advantages over analog CRO? (16) 15. (a) Explain the construction and working principle of linear variable differential transformer (LVDT). (16) 15. (b) (i) What is data acquisition system? With generalized block diagram, explain the functions of it. (10) Write short notes on smart sensors. (6)
4 B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2009 Third Semester Electrical and Electronics Engineering EE2201 MEASUREMENTS AND INSTRUMENTATION (Regulation 2008) Time : Three hours Maximum : 100 Marks Answer ALL Questions PART A (10 2 = 20 Marks) 1. Differentiate Resolution from Threshold. 2. How are the absolute and relative errors expressed mathematically? 3. What are the essential torques required for operating an instrument? 4. What is phase meter? Mention the types of phase meter. 5. What is an isolation amplifier? Where is it used? 6. State the condition for balance in a Wheatstone bridge. 7. What are the types of printers according to printing methodology? 8. What are the main parts of the cathode ray tube? 9. Differentiate sensor from transducer. 10. Draw the block diagram for 4 bit Analog to Digital Converter. PART B (5 16 = 80 Marks) 11. (a) Define and explain the static characteristics of an instrument. OR (b) (i) Draw and explain the general block diagram of measurement system.
5 Write a note on different types of errors. 12. (a) Describe the construction and working principle of single phase induction type energy meter. Write a short note on any two adjustments required in energy meters. OR (b) Explain with neat sketch the classification of Instrument Transformers. Write a note on the errors affecting the characteristics of an Instrument Transformer. 13. (a) With a neat sketch describe a bridge to determine the unknown inductance and a bridge to determine the unknown capacitance. (b) Explain the grounding techniques in detail to reduce the ground loop interference signal. OR 14. (a) Describe the LED and LCD display devices. (b) Describe the direct and frequency modulation magnetic tape recording types. Give its merits and demerits. OR 15. (a) What are the selection criteria for the transducer? Explain the working principle of LVDT with neat sketch and characteristics. Give advantages, disadvantages and applications of LVDT. OR (b) What are the performance parameters of Analog to Digital Converter? Explain any two basic A/D conversion techniques in detail.
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9 Time: Three hours A.AHAMED RIAZUDEEN AP/ EEE Reg. No. : Question Paper Code: E3082 B.E./B.Tech. DEGREE EXAMINATION, APRIL/MAY 2010 Third Semester Electrical and Electronics Engineering EE2201 MEASUREMENTS AND INSTRUMENTATION (Regulation 2008) Answer ALL Questions PART A (10 2 = 20 Marks) 1. What are the static characteristics of measurement system? 2. What is the significance of calibration? 3. Write any four types of analog ammeter used for instrumentation. Maximum: 100 Marks 4. List out the methods used for measurement of iron loss in ferromagnetic materials. 5. What is the use of potentiometer in the field of electrical measurement? 6. What is the need for screening? 7. Give the functional difference between Strip chart recorder and X-Y recorder. 8. What are the merits and demerits of Digital Storage Oscilloscope? 9. Define inverse transducers with example. 10. Mention any four types of Analog to Digital converter. PART B (5 16 = 80 Marks) 11. (a) What are the basic functional blocks of a generalized instrumentation system? Draw the various blocks and explain their functions. (16)
10 (b) A circuit was tuned for resonance by eight different students, and the value of resonant frequency in khz were recorded as 532, 548, 543, 535, 546, 531, 543 and 536. Calculate (i) the arithmetic mean, deviation from the mean, (iii) average deviation, and (iv) standard deviation. (16) 12. (a) With a neat diagram, explain the construction, working principle of single phase wattmeter. What is the importance of deflection torque in these instruments? (12 + 4) (b) Write short notes on : (i) Use of current transformer for current and power measurement. (8) Working of Weston frequency meter. (8) 13. (a) What are the difficulties associated with measurement of low resistance? Describe how low resistance is measured accurately by Kelvin s double bridge. (4 + 12) (b) (i) Discuss the effects of electro static and electromagnetic interference in instruments. (8) Write short notes on Grounding techniques. (8) 14. (a) Explain the principle of working of a magnetic tape recorder. What are (b) its basic components and their functions? (10 + 6) Briefly discuss the use of LED and LCD as display devices in instrumentation. Comment on their relative merits and demerits. (16) 15. (a) Explain the principle of the following transducers (b) A.AHAMED RIAZUDEEN AP/ EEE (i) Strain gauges (8) Piezoelectric transducers. (8) What is data acquisition system? Give the block diagram arrangement of a data acquisition system and describe the function of each component. (16) 2 E 3082
11 Time : Three hours Reg. No. : B.E./B.Tech. DEGREE EXAMINATION, APRIL/MAY 2011 Third Semester Electrical and Electronics Engineering EE 2201 MEASUREMENTS AND INSTRUMENTATION (Regulation 2008) Answer ALL questions PART A (10 2 = 20 marks) 1. Define dynamic characteristics of an instrument. 2. Write down the different Standards of an instrument. 3. State the purpose of Shunts in the Voltmeter. 4. Classify different types of iron loss. 5. List the application of A.C. bridge. 6. Enumerate the principle of grounding. 7. List any two storage devices. 8. Differentiate the functions of printer and plotter. 9. Write the function of transducer. 10. Give any two applications of Smart Sensors. PART B (5 16 = 80 marks) Maximum : 100 marks 11. (a) Describe the static and dynamic characteristics of measuring instrument. (16) (b) (i) Explain the concept of static evaluation of measurement data. (8) Question Paper Code : Describe the different calibration procedures of measuring instrument. (8)
12 12. (a) (i) With a neat block diagram, explain the construction and operating principle of digital voltmeter. (8) Describe the functional operation of energy meter. (8) (b) (i) Describe the basic magnetic measurement using B-H curve (8) Explain the operating principle of instrument transformer. (8) 13. (a) (i) Describe the operation of A.C. potentiometer. (8) (b) With a neat bridge network, derive the general equation for bridge balance with a neat a.c. bridge diagram. (8) Explain the operation of Schering Bridge to determine the unknown capacitance. Derive the relevant equations and explain the computation procedure using phasor diagram. (16) 14. (a) Write brief notes on (b) (i) Magnetic disk and tape Recorders and printers. (8+8) With a help of simplified block diagram, explain the construction and operating principle of general purpose Cathode Ray Oscilloscope. (16) 15. (a) (i) Explain the measurement of resistance using strain gauge. (8) (b) Describe the various factors influencing the type of transducer for a particular application. (8) Explain the principle of operation. (i) Piezoelectric transducer. (8 + 8) A/D converter
13 Reg. No. : B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2010 Time : Three hours A.AHAMED RIAZUDEEN AP/ EEE Question Paper Code : Third Semester Electrical and Electronics Engineering EE 2201 MEASUREMENTS AND INSTRUMENTATION (Regulation 2008) Answer ALL questions PART A (10 2 = 20 Marks) 1. Define static characteristics of an instrument. 2. What is meant by absolute error of measurement? Maximum : 100 Marks 3. Why are the ordinary wattmeters not suitable for low power factor circuits? 4. What is a phase sequence indicator? 5. List the application of D.C. potentiometers. 6. What are parasitic voltages and how are they eliminated? 7. What is the purpose of a Post Deflection Acceleration (PDA) in a CRT? 8. Differentiate between LED and LCD. 9. What are the classifications of encoder? 10. What is the need of sample and hold circuit in A/D converter?
14 PART B (5 16 = 80 Marks) 11. (a) (i) Draw the block diagram of functional elements of measuring system and explain the function of each block. (8) Explain the different types of errors in measurements. (8) (b) (i) The probable values of two resistors and their S.D are specified as R Ω, S.D = Ω, R2 = Ω, S.D. = 0.05 Ω. Find the probable value and S.D for the two resistors when they are connected in (1) Series and (2) Parallel. (8) Discuss the different types of standards of measurements. (8) 12. (a) (i) What are the various types of digital voltmeters? With a neat sketch explain the working principle of any one type of a digital voltmeter. (8) With a neat diagram explain the construction and its working principle of electrodynamometer type wattmeter. Also derive its torque equation. (8) (b) (i) Explain the method of measurements of B.H curve of a ring specimen with a neat diagram. (8) Describe the construction and working principle of digital frequency meter. (8) 13. (a) (i) Draw a neat sketch of a modern slide-wire D.C potentiometer and discuss how the potentiometer is standardized. (8) Describe how co-ordinate type potentiometer can be used for calibration of a voltmeter and A.C energy meters. (8) (b) (i) Explain the theory and working principle of Kelvin s double bridge method for measurement of low resistance. Derive the relation for finding unknown resistance. (8) A.AHAMED RIAZUDEEN AP/ EEE Discuss briefly how Hay s Bridge can be used for the measurement of inductance. (8)
15 14. (a) (i) Explain the construction and its working principle of X-Y Recorder. (6) Briefly discuss the features of digital plotters and printers. (10) (b) (i) Explain the working principle of electrostatic deflection system in a CRT. (10) Explain the working principle of digital storage oscilloscope. (6) 15. (a) (i) Explain the construction and working of unbounded and bonded type strain gauges. (8) A.AHAMED RIAZUDEEN AP/ EEE Explain the construction and working of optical encoders with a neat diagram. (8) (b) (i) Draw the generalized block diagram of a digital data acquisition system and explain. (8) Explain the successive approximation method of A/D converter. (8)
16 Reg. No. : B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER Time : Three hours Third Semester Electrical and Electronics Engineering EE 2201 MEASUREMENTS AND INSTRUMENTATION (Regulation 2008) Answer ALL questions. PART A (10 2 = 20 marks) 1. List the functional elements of a measuring instrument. 2. What is drift? 3. How does one extend the range of ammeter and voltmeter? 4. Why do we do Ballistic tests? 5. What are the applications of dc potentiometer? Maximum : 100 marks 6. Which bridge is used to measure incremental inductance? Write the expression. Question Paper Code : How does dynamic scattering type LCD work? 8. What are the advantages of magnetic tape recorder? 9. List any four force summing devices. 10. Mention the need of ADC and DAC in Digital Data Acquisition System. PART B (5 16 = 80 marks)
17 11. (a) (i) Explain any four static characteristics of measuring instruments. How are errors classified? Explain systematic error. (8) (b) (i) Explain the classification of standards in detail. (8) How are histogram and arithmetic mean helpful in the statistical analysis of data? (8) 12. (a) (i) How to measure the power using instrument transformers? Explain. (8) How is multi-meter used to measure different parameters? Explain. (b) (i) How do you determine the B-H curve using step by step method? What are the different methods used for the measurement of frequency? Explain any one method. (8) 13. (a) (i) How does one measure the resistance using potentiometer? (8) How do you measure the phase angle using ratio transformer? (8) (b) (i) Explain in detail the electro-static and electro magnetic interference. (8) Mention the importance of Grounding. What are the different grounding techniques used? (8) 14. (a) (i) Draw the block diagram X-Y Recorder and explain. (8) Explain data loggers in detail. (8) (b) (i) Draw the internal block diagram of CRT and explain. (8) Compare the features of FM recording with PDM recording. (8) (8) (8) (8)
18 15. (a) (i) Tabulate the principle of operation and typical application of resistive, capacitive and inductive transducers. (8) Why do we need to acquire data? What are the blocks involved in digital DAQ system? (8) (b) (i) What is self generating transducer? Give two examples of self generating transducers and explain its working principle. (8) Explain the smart sensors in detail. (8)
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