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Engineering Subjects

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Electrical and Electronic Measurements and Instrumentation

  1. What's new in this club
  2. Explain the method for testing the dielectric strength of insulating oil according to IS specifications. You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  3. Describe the various high voltage tests that are carried out on porcelain insulators. You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  4. Describe the working of Marx circuit used for impulse testing. Explain the impulse testing of transformers. You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  5. Describe the circuit of a single stage impulse generator. Describe how surge voltages are generated by applying a step voltage to an RLC series circuit You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  6. Explain why transmission lines and cables, which are used for power transmission and distribution of a.c. voltages, are tested with high voltage d.c. Describe the circuits used for high voltage d.c. testing of cables. Describe why is it necessary to establish an equivalence between d.c. and a.c. test voltages. You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  7. Describe the Cockcroft Walton circuit for production of high voltage d.c. You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  8. Describe the working, advantages and disadvantages of the following types of voltmeters used for measurement of peak values of high voltages. (i) Ryall crest voltmeter, (ii) Ionic wind voltmeter. You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  9. Describe the rectified capacitor charging current method for measurement of peak values of high voltages. Describe its advantages and limitations. You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  10. Describe the use of sphere gaps for measurement of peak voltages. Discuss the advantages and disadvantages of using sphere gaps. You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  11. Explain the following potential divider methods for measurement of r.m.s. value of high voltages, (i) resistance potential divider, (ii) capacitive potential divider and (iii) compensated capacitive potential divider. You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  12. Describe the different electrostatic type of voltmeters used for measurement of r.m.s. value of high voltages. Explain their advantages and disadvantages. You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  13. Draw the circuit diagram for high voltage testing at power frequencies. Explain the functions of the control and protective devices. You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  14. Describe the different methods of voltage control used for high voltage test circuits. Explain their applications, advantages and disadvantages. You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  15. Explain the reasons for connecting H.V. transformers in cascade. Explain, with the help of a diagram, the cascade connections of two transformers. You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  16. Describe the constructional details of a H.V. transformer and explain the reasons for difference in construction of H.V. testing transformers and power transformers. You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  17. Why is high voltage testing important for electrical power apparatus and insulating materials ? Describe briefly the different high voltage tests done on electrical apparatus You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  18. Explain a method for testing of permanent magnets. You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  19. Explain the oscillographic method of determination of hysteresis loop of a magnetic material. You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  20. What is Nuclear Magnetic Resonance ? Explain how the strength of a magnetic field in air can be determined using this principle You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  21. Describe how magnetizing and loss components of no load current of a transformer be determined by using an a.c. potentiometer. You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  22. Explain how the value of a.c. permeability of magnetic materials is determined through the use of : (i) Maxwell's Bridge and (ii) Campbell's Bridge. You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  23. Describe the Lloyd Fisher square for measurement of iron losses in a specimen of laminations. Describe how corrections for resistance of wattmeter pressure coil resistance and resistance of secondary winding are applied. How is the true value of flux density obtaining in the laminations determined ? You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  24. Explain the methods of separation of iron losses into their two components : eddy current and hysteresis losses, if the maximum value of flux density is maintained constant and (i) frequency is varied keeping the form factor constant (ii) form factor is varied keeping the frequency constant. You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  25. Describe the construction and working of following types of permeameters : (i) Illiovici permeameter (ii) Burrow's permeameter. You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  26. What are Permeameters ? Explain the working of a Hopkinson Permeameter. You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
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