Measurement and Instrumentation: Important Part B Questions

Basic Electronics and Electrical Engineering

Chapter 6: Measurement and Instrumentation

PART B QUESTIONS

1. Draw the block diagram showing the basic functional elements of an instrument and explain the functions of each.

2. Define limiting errors. Derive the expression for relative limiting errors.

3. Give the methods of using any three standard inputs being used for analyzing the dynamic response of system with neat sketches.

4. Explain on the static and dynamic characteristics of a measurement system.

5. Describe in detail the different types of dynamic errors in a measurement system.

6. Derive the torque equation of electrodynamometer type instrument.

7. Explain with neat circuit diagram the working of successive approximation type DVM.

8. Draw the circuit diagram of digital phase meter and explain its working.

9. Give the construction and principle of operation of single phase induction type energy meter.

10. Describe the construction and working of PMMC instrument. Derive the equation for deflection if the instruments are spring controlled.

11. Derive the torque equation for an electro dynamometer type of wattmeter.

12. Write briefly with neat figures on (i) Principle of operation of a current transformer (ii) B‒H curve analysis of a magnetic circuit.

13. Explain the working of moving iron instruments.

14. Explain the function of 3 phase energy meter and wattmeter.

15. How the range of d.c. Ammeter and d.c voltmeter can be extended? Derive the expressions to calculate shunt resistance and multiplier resistance.

16. Explain the construction, working principle of a three‒phase wattmeter. What is the importance of deflecting torque in these analog instruments?

17. Derive the bridge balance condition for the Maxwell bridge and Schering bridge.

18. Explain in detail about the laboratory type DC potentio meter.

19. Describe about the multiple earth and earth loops.

20. Explain the different techniques of grounding.

21. Describe the principle of working and circuit diagram of a digital oscilloscope.

22. With neat figure explain the working principle of a digital CRO. What are its advantages of analog CRO.

23. Describe the construction and working of LCD's, mention the difference between light scattering and field effect types of LCD's also explain the advantages of LCDs.

24. How the transducers are classified on the basis of principle of operation?

25. Explain the generalized diagram of a digital data acquisition system?

26. Describe the different modes of operation of piezo electric transducers.

27. Describe the different principles of working of capacitive transducers.

28. Explain the construction and principle of working of a LVDT.

29. Explain about the thermistor and thermocouples.

30. Discuss R‒2R ladder type DAC.

31. Explain the resistive transducer with respective potentiometer.

32. Explain the principle of operation of piezo electric transducer.

33. Describe the principle of working and circuit diagram of a digital oscilloscope.

34. With neat figure explain the working principle of a digital CRO. What are its advantages of analog CRO.