CL7102 Transducer & Measurements M.E Question Bank : valliammai.co.in

Name of the College : Valliammai Engineering College
University : Anna University
Department : Electronics & Instrumentation Engineering
Subject Code/Name : CL7102-Transducer & Measurements
Degree : M.E C&I
Year : I
Semester : I
Document Type : Question Bank
Website : valliammai.co.in

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Valliammai Transducer & Measurements Question Paper

Unit-I

Resistive, Inductive And Capacitive Elements :
Part-A :
1. What is meant by strain gauge
2. Mention the advantages and drawbacks of the temperature instability
3. State any one temperature instability problem
4. Sketch the equivalent circuit of inductive element

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5. Define gauge factor of a strain gauge
6. A transducer is subjected to sudden change in input. It takes 10 seconds for the transducer to reach equilibrium condition. Find the time constant of the transducer.
7. Classify the mechanical structures used for measurement of displacement, force, pressure, fluid level and velocity
8. For a helical spring obtain the displacement of the spring
9. A capacitor of capacitance 245pF produces resonance at an angular frequency of 5 rad/s. While a capacitor of capacitance 50Pf produces resonance with the record harmonic of this frequency. Calculate the inductance and the self capacitance of the coil.
10. Sketch the equivalent circuit of capacitive element

11. Name the methods used for rotational displacement measurement
12. State the principle of magneto strictive transducer
13. Write the output expression for the differential displacement element
14. State the characteristics of inductive element
15. Name the method used for measurement of liquid level
16. What is meant by polar and non-polar dielectrics in capacitive transducer element
17. Mention the various physical effects employed for measuring the thickness of metal foil
18. What is the use of the signal conditioning circuit
19. State the application of the differential displacement element
20. What is meant by displacement to phase conversion

Part-B :
1. Explain indetail about the capacitive elements structure,equivalent circuits and characteristics
2. Describe in detail about the single,differential and single displacement elements
3. Describe the operation of magneto strictive transducer
4. Explain the principle of operation of strain gauge and signal conditioning circuit for the same
5. Obtain the output expression of differential displacement element
6. Explain any one differential displacement element with a application
7.Explain the signal conditioning circuit for temperature compensation of strain gauge
8.Discuss in detail about displacement to phase converters
9. Explain indetail about the inductive elements structure,equivalent circuits and characteristics
10.A strain gauge is bonded to a beam of 0.1m long and has a cross sectional area of 4 cm2.Youngs modulus for steel is 20.7GN/m2.The Strain gauge has a unstamped resistance of 240 ohms.and a gauge factor of 2.2.When a load is applied the resistance of gauge changes by 0.013 ohms.Calculate the change in length of the steel beam and amount of force applied to the beam

Unit-II

Transformer, Electrodynamic, Servo And Resonant Elements :
Part-A :
1. What is synchro transformer?
2. Write the principle of weak-field sensors.
3. List out the merits of weak-field sensors.
4. Write the comparison between the rotating coil and differential coil transformer element.
5. What is a resonator? Mention the various components of it.
6. Write the expression for frequency of vibration of a string.
7. Write down the expression for the frequency of the sound produced by the string.
8. Write the principle of piezoelectric resonator.
9. Write the principle of acoustical resonator.
10. What are electrodynamic elements?
11. Explain the principle of moving coil electrodynamic element.
12. Write the principle of variable reluctance electrodynamic element.
13. Write about electromagnetic flowmeters.
14. Write about non-electrode electromagnetic flowmeter.
15. Sketch the structure of vibrating capsules.
16. What is meant by thermo migration?
17. What are the various elements of weak-field sensors
18. Mention the various components of resonator
19. Write the comparision between differential and rotating coil transformer
20. Write the application of piezoelectric resonator

Part-B :
1. Explain about Single core transformer
2. Explain about the Differential core transformer.
3. Explain in detail about vibrating string.
4. Explain Rotating coil transformer.
5. Draw the neat sketch and explain the working of Synchro transformer
6. Explain about vibrating beam with relevant equation.
7. Explain briefly about Moving coil electrodynamic element.
8. Explain in detail about Variable-reluctance electrodynamic element.
9. Briefly explain the piezoelectric resonator with an equivalent circuit.
10. Explain in detail about vibrating cyinders with neat diagram.

Unit-III

Mechanical, Acoustical And Flowmetering Elements :
Part-A :
1. Write the short notes about the inertial mass element.
2. Sketch an acoustic low pass filter.
3. Write the principle of ultrasonic flow meter.
4. Explain the working of orifice plate. Write the relevant expression.
5. Identify the causes for temperature drift of diaphragm.
6. Identify the causes for sensitive drift of diaphragm.
7. Explain the working principle of bourdon tube with relevant expression.
8. Write the principle of absolute pressure diaphragm?
9. Draw the different configurations of absolute pressure diaphragm.
10. What is electromagnetic flow meter?
11. What is nano electromagnetic flow meter?
12. Explain Doppler Effect ultrasonic flow meter.
13. Explain clamp on transit time ultrasonic flow meter.
14. Explain wetted ultrasonic flow meter.
15. Explain wide beam ultrasonic flow meter.
16. Write the principle of acoustic low pass filter
17. Write the principle of nano electromagnetic flow meter
18. Mention the importance of acoustical elements in measurements
19. Sketch the Pyroelectric detector
20. State the use of wetted ultrasonic flow meter

Part-B :
1.Explain temperature drift & sensitivity to acceleration parameters of diaphragm
2.Explain the operation of ultrasonic type of flow meter.
3. Explain the design of low pass acoustical filter.
4. Classify the transduction element for flow measurement.
5. Explain the working of Pyroelectric detectors
6. Explain the working of nano electrode magnetic flow meter
7. Sketch and explain the stress state of diaphragm.
8. Explain the working of absolute pressure capsules with appropriate diagrams.
9. Explain the working of Thermal detectors
10. Explain the various elements of vibrating measuring instruments.