JNTU
JNTU B.Tech II TRANSDUCERS ENGINEERING Previous Question Paper (April/May - 2023 - R18)
Note: i) Question paper consists of Part A, Part B. ii) Part A is compulsory, which carries 25 marks. In Part A, Answer all questions. iii) In Part B, Answer any one question from each unit. Each question carries 10 marks and may have a, b as sub questions.
Part A
Classify Sensors based on different exhaustive criteria.
Answer
Sensors are classified based on: 1) Power source (Active vs. Passive), 2) Output signal (Analog vs. Digital), 3) Detection principle (Resistive, Capacitive, Inductive, Piezoelectric, Optical, etc.), and 4) Application (Physical, Chemical, Biological, or Thermal).
What is the purpose of an RTD?
Answer
An RTD (Resistance Temperature Detector) is used for precise temperature measurement by exploiting the predictable change in electrical resistance of a metal (typically platinum) as a function of temperature. It serves as a highly stable and accurate primary sensing element in industrial and laboratory applications.
State different piezo electric materials.
Answer
Sign in to view the complete answer paper.
State the different Laws of Practical Thermocouples.
Answer
Sign in to view the complete answer paper.
What are the Standards of Smart Sensors?
Answer
Sign in to view the complete answer paper.
What are the functions of Optical Encoder?
Answer
Sign in to view the complete answer paper.
Give any two examples of MEMS Sensors.
Answer
Sign in to view the complete answer paper.
What is the working principle of Optical MEMS?
Answer
Sign in to view the complete answer paper.
How is Noise eliminated using Filters?
Answer
Sign in to view the complete answer paper.
What is the purpose of Scott Transformer in Synchro-to-resolver Converter?
Answer
Sign in to view the complete answer paper.
Part B
Describe how the effects of interfering and modifying inputs can be reduced in the Measuring Instruments.
Answer
Sign in to view the complete answer paper.
A given PRT has 100 Ω and δ = 6 mW/K when immersed in air and δ=100 mW/K when immersed in still water. Calculate the maximal current through the sensor to keep the self-heating error below 0.1 °C.
Answer
Sign in to view the complete answer paper.
Describe the measurement of Humidity using Resistive Hygrometers.
Answer
Sign in to view the complete answer paper.
Explain in detail about the Generating Tachometers based on Faraday’s Laws.
Answer
Sign in to view the complete answer paper.
Describe in detail about the different type of Common Thermocouples and also list out the characteristics of the common Thermocouples.
Answer
Sign in to view the complete answer paper.
Explain the working principle of pyroelectric sensors.
Answer
Sign in to view the complete answer paper.
Describe in detail about Hall Effect Sensor.
Answer
Sign in to view the complete answer paper.
Explain the Radiation Laws for measuring the surface temperature of a heated target.
Answer
Sign in to view the complete answer paper.
Discuss the working of sensors based on MOSFETs.
Answer
Sign in to view the complete answer paper.
With a neat diagram, explain the Smart Sensor System.
Answer
Sign in to view the complete answer paper.
Describe the working of Smart Sensor for the measurement of Temperature.
Answer
Sign in to view the complete answer paper.
With a neat diagram, describe the working principle digital flow meters.
Answer
Sign in to view the complete answer paper.
Describe the role of MEMS in instrumentation.
Answer
Sign in to view the complete answer paper.
With a neat diagram, illustrate the measurement of Force using MEMS Sensor.
Answer
Sign in to view the complete answer paper.
Summarize the typical advantages and applications that needs MEMS Sensor.
Answer
Sign in to view the complete answer paper.
Explain the working principle of MEMS Micro Actuators.
Answer
Sign in to view the complete answer paper.
Describe the measurement of high-value resistance using Voltage Dividers.
Answer
Sign in to view the complete answer paper.
Illustrate the three-wire method for measuring with a Wheatstone bridge when long wire leads are used.
Answer
Sign in to view the complete answer paper.
Calculate the effective CMRR for a differential amplifier connected to a full bridge built from 350 Ω strain gauges whose maximal change is 1 % if the common-mode input resistance is 110 kΩ and CMRR = 86 dB. If the bridge is supplied at 12 V, and the amplifier has G = 10, calculate the output voltage at null condition and when the strain gages undergo their maximal change.
Answer
Sign in to view the complete answer paper.
With a neat diagram, explain the working of Digital-to-Resolver Converter.
Answer
Sign in to view the complete answer paper.