Sensors and Transducers B.E Question Paper : jaduniv.edu.in
Name of the University : Jadavpur University
Department : Power Engineering
Degree : B.E
Subject Name : Sensors and Transducers
Year/Sem : IV/I
Website : jaduniv.edu.in
Document Type : Model Question Paper
Download Model/Sample Question Paper : https://www.pdfquestion.in/uploads/dspace.jdvu.ac.in/5504-Sensors%20and%20Transducers.pdf
Jadavpur University Sensors & Transducers Question Paper
B. Power Engg.4 year First Semester Supplementary Examination 2010 :
Time: 3 hrs.
Full Marks: 100
Related : Jadavpur University Power Transducer Technology B.E Question Paper : www.pdfquestion.in/5503.html
Answer Any Five :
1. a. Define offset, gain and hysteresis error for a sensor. 6
b. Distinguish between primary and secondary transducers. 4
C. A transducer with again of lm Wmm and connected to an amplifier with a supply of its Volts is used to measure a displacement which varies between10cm to 10cm. Suggest a suitable amplifier gain for a meaningful reading – 8
d, What happens if a high amplifier gain is used? 2
2. Deduce an expression for gauge factor of a strain gauge. 15
b. How does a strain gauge differ from a piezoresistive material? 5
3. Calculate following:
i. Cut-off frequency in Hertz.
ii. Maximum amplitude of vibration the sensor can pick up
iii. The amplitude of the sensoramplifier output if the frequency of vibration is 100Hz.
b. What are the different configurations of a piezo crystal? 5
4.a. Draw the schematic for measurement of level with a capacitive transducer. Derive the relationship.15
b. Can this be used for measurement of any liquid level? What can be done in those cases this scheme cannot be used? 5
5. With the help of a meat schematic explain the principle of temperature measurement using an IC sensor. Assume a suitable IC sensor and explain how the biasing resistances are selected. 20
6.a.A shaft is fitted with a disc of radius r cms, which is encoded with n tracks. The encoding is decoded using a laser sensor which has a processing delay Ta secs. The shaft rotates at a uniform speed of to rads
Calculate the following:
i. Width of each bit along the radius
ii. Maximum value of Ta 10
b.Explain the principle of digital frequency measurement, 10
7.How can thermal conductivity of a gas be measured? Explain with a neat schematic.
b. Explain the principle of temperature measurement using an optical pyrometer.
c. A fluid flows with a Velocity win a pipe of diameter D and a length L. lf L is large enough, deduce an expression fory measured by ultrasonic TIl3llS.
8.a. State and deduce the law of intermediate junctions for thermocouples. 5
b.Enumerate and compare the different temperature sensors from a linearity perspective.
c. Deducing necessary expressions, explain the -wire RTD method of measurement of temperature. 10
Transducers & Sensors Syllabus
Transducer and Sensors- basic principles and requirements.Measurement of Pressure, Flow, Temperature, Level, Conductivity, PH, linear and rotational displacement, strain. Thermocouples, RTDs. Primary flow measuring elements used in power plants.
Pressure Transmitters. Drum level measurement using density correction. Valve position sensing. Limit switches.Sensing current, voltage, frequency and magnetic flux density.
Hall effect devices. Optical temperature measurements- principles only.Signal conditioning requirements and signal transmission- the 4-20 mA loop. Telemetry.
Transducer Laboratory Syllabus
** Measurement of Steam Pressure
** Measurement of Temperature
** Measurement & Control of Drum Level PH
** Measurement of Water
** Measurement of Electrical Conductivity of Water
** Measurement of Flow rate Study of various Transducers and their signal conditioning
PE/T/414 Non Conventional Power Generation-II Syllabus :
Wind Power Generation, its history, Principles of wind power, Maximum & Actual Power, Wind Turbine operation Small and Large Wind Turbines, recent developments. Ocean Thermal Power Generation. Wave Thermal Power Generation. Geothermal Power Generation. Variability in non-conventional power generation level, Integration and Grid inter connection. Energy Storage systems.