GTU BE/B.Tech 2019 Winter Question Papers || Gujarat Technological University
Subject Name: Sensor and Instrumentation
Time: 02:30 PM TO 05:00 PM Total Marks: 70
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER- III (New) EXAMINATION — WINTER 2019
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Subject Code: 3134103 Date: 28/11/2019Subject Name: Sensor and Instrumentation
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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| Marks | |
|---|---|
| Q.1 (a) Differentiate between sensor and transducers. | 03 |
| (b) Define following term: 1) Sensitivity 2) Hysteresis 3) Precision 4) Accuracy | 04 |
| (c) Explain the principle of operations of LVDT with the help of neat sketch and characteristics. | 07 |
| Q.2 (a) Define following terms: 1) Gauge Factor 2) CMRR 3) Span | 03 |
| (b) Explain the function block of the measurement system with neat diagram. | 04 |
| (c) Describe the RTD and explain, how it can be used to measure temperature. | 07 |
| OR | |
| (c) Discuss about the construction of thermistor and its resistance temperature characteristics. | 07 |
| Q.3 (a) What is smart sensor. Mention application of smart sensor. | 03 |
| (b) Explain Piezo resistive effect. | 04 |
| (c) What is Amplifier ? Describe the ideal characteristics of operational amplifier | 07 |
| OR | |
| Q.3 (a) Define noise. write the classification of noise. | 03 |
| (b) Explain seeback and Peltier effects | 04 |
| (c) Explain voltage follower | 07 |
| Q.4 (a) Write application of tactile sensor. | 03 |
| (b) Explain the strain gauge. | 04 |
| (c) Explain heat transfer using thermal conduction. | 07 |
| OR | |
| Q.4 (a) Define gyroscope. Write working principle of gyroscope. | 03 |
| (b) Explain Square wave Oscillator. | 04 |
| (c) Explain Zener diode with circuit Diagram and Draw the voltage — current characteristics. | 07 |
| Q.5 (a) Describe about DAQ? What is the need for DAQ? | 03 |
| (b) Explain two wire Data Transmission. | 04 |
| (c) Explain how the fiber optic sensor work and list out its advantages. | 07 |
| OR | |
| Q.5 (a) What is the purpose of the sample and hold circuit? | 03 |
| (b) Explain null balance bridge circuit . | 04 |
| (c) Explain successive — Approximation type A-D converter. | 07 |
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