ELECTRICAL & ELECTRONICS

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1 EE 326 (RR) Total No. of Questions :09] [Total No. of Pages : 02 III/IV B.Tech. DEGREE EXAMINATIONS, APRIL/MAY Second Semester ELECTRICAL & ELECTRONICS ELECTRICAL MEASUREMENTS Time: Three Hours Answer Question No.1 Compulsory. Answer One Question from each Unit. 1. a) Write the applications of PMMC. b) Define dynamometer. c) Principle of power factor meters d) Give the merits of frequency meters e) Write the applications of current transformer. f) Why Maxwell s bridge is used? g) Give the applications of Schering s bridge h) Why Kelvin s bridge is used? i) What is Ballistic galvanometer? j) What is flux meter? k) Write the applications of LED s l) What is thermo couple? m) Write the applications of LVDT? n) What is strain gauge? UNIT-I 2. a) Explain about PMMC instrument. b) Briefly explain about frequency meters. Maximum marks:70 14X1=14M 4X14=56 M 3. a) Explain the construction and principle operation of power factor meters. b) Discuss about dynamo meters and give its applications. UNIT-II 4. a) Explain the principle operation potential transformers (PTs). b) Explain Maxwell s bridge for messurement of unknown inductance. Determine the condition for balance. 5. Explain Wein s bridge and sharing s bridge. 1 P.T.O

2 UNIT-III 6. a) Explain the methods of measurement of iron loss using Epstein square. b) Explain about elastic galvanometer with a neat sketch. 7. a) Briefly explain about flux meter with a neat sketch. b) Explain the methods of reversals for determination of B-H curve UNIT-IV 8. a) What is a transducer? Explain LVDT transducer with neat sketches. b) Explain about LED s. And also give its applications. 9. a) Explain about thermo couples. And discuss its advantages and disadvantages. b) Discuss about time base circuits. 2

3 EE 326 A (CR) Total No. of Questions :09] [Total No. of Pages : 02 III/IV B.Tech. DEGREE EXAMINATIONS, APRIL/MAY Second Semester ELECTRICAL & ELECTRONICS HIGH VOLTAGE ENGINEERING Time: Three Hours Answer Question No.1 Compulsory. Answer One Question from each Unit. 1. a) What is the application area of impulse generator? b) Differentiate wave shape control resistors? c) What are the advantages of cockcroft walton cascade arrangement. d) What is the testing of surge diverter? e) What is the voltage regulation? f) What are the series impedance meters. g) What are the potential dividers for dc and ac? h) What is measurement of high dc? i) What is the cockcroft walton multiplier? j) What is the rectangular current pulse? k) What is meant by breakdown criterion l) Define field factor? m) What is the charge simulation method n) What is Corona? UNIT-I Maximum marks:70 14X1=14M 4X14=56 M 2. Explain the working and principle of multistage impulse generator with neat diagram. 3. Write and explain about impulse current generator. UNIT-II 4. Explain the resistive shunts-cro for impulse measurements. 5. Explain the high power frequency A.C and high frequency impulse currents. 6. What is the testing of bushings. UNIT-III 1 P.T.O

4 7. What are the testing of isolators and circuit breakers? UNIT-IV 8. Explain briefly finite element and finite difference method. 9. Explain about the charge simulation method. 2

5 EE 326 A (CR) Total No. of Questions :09] [Total No. of Pages : 02 III/IV B.Tech. DEGREE EXAMINATIONS, NOV/DEC-2017 Second Semester ELECTRICAL & ELECTRONICS ENGINEERING HIGH VOLTAGE ENGINEERING Time: Three Hours Maximum marks:70 Answer Question No.1 Compulsory 14X1=14 M Answer ONE Question from each Unit 4X14=56 M 1. a) What is the power frequency b) What is the energy of impulse generator. c) What is voltage dividers for capacitive. d) Differentiate wave shape control resistors. e) What is corona? f) What is the function of high speed oscilloscope. g) What is the reason for the use of fibre optics in HV measurement. h) What is the voltage regulation. i) What are the potential dividers for dc and ac. j) What is measurement of high dc? k) What is meant by breakdown criterion. l) What is the rectangular current pluse. m) What is meant by Resonant transformer. n) What is the charge simulation method. UNIT-I 2. Briefly explain the properties of double exponential wave shape? 3. Write and explain impluse current generator? UNIT-II 4. Explain the resistive shunts-cro for impulse measurements. 1 P.T.O

6 5. a) What is the dc layout of high voltage las? b) What are the uses of fibre optics in hv measurement of high voltage. 6. What is the testing of bushings? UNIT-III 7. What are the testing of isolators and circuit breakers. UNIT-IV 8. Describe briefly about the charge simulation method. 9. Explain briefly finite element method. 2

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