Question Bank For Unit I Of Mechatronics.doc

T.E Semester II-Mechanical Mechatronics (302050) Unit I Question Bank 1. Explain Generalized Measurement system with three stages. Discuss Strain Gauge as generalized measurement system. 2. Explain the method of flow measurement and instrument used. 3. Define (i) Accuracy (ii) Precision (iii) Zero drift. 4. Explain Strain Gauge used in pressure measurement. 5. Explain absolute and incremental optical encoders. 6. Explain typical LVDT specifications. 7. Explain the working principle of Thermocouples and state its advantages. 8. Explain constructional schematic and applications of proximity sensor. 9. With respect to Principle, measuring range, sensitivity; explain Resistive Temperature Detector. 10. With respect to principle, schematic arrangement and applications explain Inductive sensor. 11. Write four distinct points of comparison between Inductive and Capacitive sensors. 12. Using a suitable sketch, explain the working of capacitive proximity sensor. 13. Write four advantages, limitations and applications of Linear Variable Differential Transformer. 14. Write a short note on Variable Reluctance Sensor. 15. Enlist the transducers used for position measurement and explain any one of them. 16. With respect to principle, schematic arrangement and applications explain force transducer. 17. Using a suitable sketch explain the working of an angular velocity sensor. 18. With respect to construction, advantages and applications explain Strain gauges for force measurement. 19. Compare Absolute and Incremental encoders. 20. Compare RTD and Thermocouples with respect to principle, applications, and limitations. 21. With a connection diagram explain the working principle of thermocouple. 22. With a connection diagram explain the working principle of Resistance Temperature Detector (RTD). 23. Suggest the type of Sensor & signal conditioning circuit required: a) To transform an input temperature change to resistance change. b) To transform a displacement to a voltage. 24. Draw a suitable sketch and explain the working of Electromagnetic Flow Sensor. 25. Describe proximity sensor with application. 26. Give any two definitions of Mechatronics. Explain the scope and importance of Mechatronics and applications. 27. What is a measurement system? Explain with a neat sketch various components of a measurement system. 28. Differentiate between static and dynamic characteristics of measuring instruments. Explain the following. a) Hysteresis b) Sensitivity c) Drift d) Accuracy 29. Explain different types of dynamic characteristics of measurement systems such as a) Response time b) Rise time c) Settling time 30. Compare an LVDT with a potentiometer as a position sensor. What are advantages and disadvantages of using an LVDT? 31. What is meant by Temperature Compensation in Strain Gauges and how it is done.

32. Explain basic operation of rotary encoder. 33. Explain capacitive and inductive principles used in position sensing. 34. Explain principle and working of LVDT with circuit diagram. 35. Write short note on inductive proximity sensor. 36. Explain the principle and working of 3 bit absolute optical encoder. 37. Explain the working principle and construction details of servo motor and its application. 38. Explain the working principle and construction details of stepper motor and its application. 39. Explain the working and construction of Solenoids with the neat sketch. 40. A 300° wire-wound potentiometer has 300 turns and a total resistance of 1 kΩ. What is the resolution in ohms? In degrees? 41. An optical encoder of 1500 ppr is rotating with a speed of 300rpm. Find out resolution of encoder. 42. A 350° wire-wound potentiometer has 300 turns and a total resistance of 1 k what is the resolution in ohms? In degrees? 43. An ammeter requires a change of 3 A in its coil to produce a change in deflection of the pointer by 12 mm. Determine its sensitivity. 44. The amplifier system of CRO is stated to have a sensitivity of 2.2 cm/V. What would be the deflection on the screen for an input of 0.38 V? 45. The output of LVDT is connected to a 5 V voltmeter through an amplifier of amplification factor 250. The voltmeter scale has 100 divisions and the scale can be read to

of a division and output of 2

mV appears across the terminals of the LVDT when the core is displaced through a distance of 0.5 mm. Calculate: a) The sensitivity of LVDT. b) The sensitivity of whole set up. c) The resolution of the instrument is in mm. 46. Sensitivity of a thermocouple is 0.01V/°C. Find the output voltage if the temperature is 200°C. Also find temperature for 3.5V output. 47. The individual sensitivities of different elements comprising a temperature measuring system are: Transducer = 0.3 ohm/ ̊C; Wheatstone bridge = 0.01 V/ohm; amplifier gain = 80 V/V; pen recorder = 1.2 mm/V. Determine the overall sensitivity and the temperature change corresponding to a pen recorder movement of 30 mm. 48. A quartz piezoelectric crystal having a thickness of 2 mm and a voltage sensitivity of 0.055 Vm/N is subjected to a pressure of 1.38*10^6 N/m 2. Calculate the voltage output. 49. A potentiometer which is used to measure the rotational position of a shaft has 850 turns of wire. The input range is from -160 ̊ to +160 ̊. The output range is from 0V to 12V. Determine a) The sensitivity in volts per degree b) The average resolution in volts 50. A ammeter has a uniform scale with 100 divisions, the full scale reading is 50 mA and 1/15 of a scale division can be calculated with fair degree of certainty. Determine the resolution of the instrument in amperes. 51. The output of a LVDT is connected to a 10 V ammeter through an amplifier whose amplification factor is 200. An output of 3 mA appears across the terminals of LVDT when the core moves through a distance

of 0.75 mm. Calculate the sensitivity of LVDT and that of whole setup. The milliammeter scale has 100 divisions. The scale can be read to 1/10 of a division. Determine the resolution of the instrument in millimetres. 52. A voltmeter requires a change of 5 V in its coil to produce a change in deflection of the pointer by 10 mm. Determine its sensitivity.