Total marks: --
Total time: --
INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary

1 (a) Classify transducers with suitable example.
5 M
1 (b) Define
i) Accuracy
ii) Sensitivity
5 M
1 (c) Explain working principle of-
i) Piezo electric transducers
ii) Piezo resistive transducers
5 M
1 (d) Find seeback voltage for a thermocouple with proportionality constant of 40μV/°C if the junction temperatures are 40°C and 80°C.
5 M

2 (a) Draw and explain working of LVDT. What causes residual voltage to occur?
10 M
2 (b) A voltmeter having a sensitivity of 1000Ω/V reads 100V on its 150V scale when connected across an unknown resistor in series with milliammeter. When milliammeter reads 5 mA, calculate
i) Actual resistance of the unknown resistor.
10 M

3 (a) Explain any five static characteristics of transducer with suitable examples.
10 M
3 (b) What is the need of lead wire compensation? How it is to be done in RTD? What is self heating effect in RTD?
10 M

4 (a) For a certain thermistor β=3140 K and at 27°C is known to be 1050 Ω. The thermistor is used for temperature measurement and the resistance measured is as 2330 &Omega. Find the measured temperature.
10 M
4 (b) Draw set up and explain working of air purge method of level measurement.
10 M

5 (a) Explain radioactive type level detector in detail.
10 M
5 (b) A capacitive transducer uses two quartz diaphragm of area 750mm2 separated by a distance of 3.5 mm. A pressure of 900 KN/m2 when applied to top diaphragm produces a deflection of 0.6 mm. The capacitance is 370 pF when no pressure is applied to the diaphragm. Find the value of capacitance after the application of pressure 900 KN/m2.
10 M

Write short notes (Any Two):
6 (a) Optical pyrometer.
10 M
6 (b) Rotary encoder.
10 M
6 (c) Types of error.
10 M

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