JNTU
JNTU B.Tech II TRANSDUCERS ENGINEERING Previous Question Paper (November/December - 2017 - R16)
Note: This question paper contains two parts A and B. Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit.
Part A
Justify Piezoelectric transducer as an active transducer.
Answer
A piezoelectric transducer is classified as an active transducer because it generates its own electrical output signal (voltage) in response to an applied mechanical stress, without requiring an external power source for the conversion process.
Summarize Primary standard and Secondary standard in your own words.
Answer
A Primary standard is a physical reference defined by international agreement or fundamental physical constants, representing the highest level of accuracy and used to calibrate secondary standards. A Secondary standard is a reference instrument calibrated against a primary standard; it is more portable and robust, serving as the practical reference for routine calibration of industrial or laboratory instruments.
Give an example of zero order instruments and write the expression for it.
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State different dynamic characteristics of measuring system.
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Define Piezo resistive effect.
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Name few active transducers suitable for pressure measurement. State the principles.
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State the two basic principles on which the flow visualization schemes work. Briefly explain.
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Briefly explain the principle of working of Gyroscope.
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Name few Obstruction meters for flow measurement. Write down their flow ranges.
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Write down the equation for volume flow rate of a Rota meter and briefly explain the terms used in the equation.
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Part B
Describe the Weston Saturated Cells used as emf standards. What are the precautions taken while using them?
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Identify the desired input, interfering input and modifying input and their effects on the instruments with the help of generalized input output configuration.
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List out the classification of Sensors. Give examples of each.
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What is the importance of Linearity in measurement? Explain linearity in measurement with example.
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Show that a Mercury-in-glass thermometer, to a reasonable approximation, behaves as a first order instrument.
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Obtain the generalized mathematical model of Measurement system and discuss about the solutions for different kind of roots.
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Derive the transfer function of a thermal system when the heat input rate is suddenly increased from its steady conditions. Discuss the assumptions made.
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Show the effect of damping coefficient in the response of Second order system with equations. Derive Second order transfer function.
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Explain how Strain gauges are employed for the measurement of pressure. List the advantages.
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Highlight the importance of Thermocouple laws in industries. State the laws in detail.
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Explain the principle of Optical Pyrometer which makes it suitable for very high temperature measurement.
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Highlight the applications of Vibrating Cylinder for pressure measurement.
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With neat schematic of basic McLeod gage explain the measurement of low pressure.
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Define Sound Pressure level (SPL). With the help of block diagram explain the working of Sound level meter.
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Describe the construction and principle of operation of ionization gauge for Vacuum measurement.
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What are the factors that govern the selection of measuring device for Vacuum? Discuss the working of Knudsen gauge.
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Explain the principle of operation of Vortex Shedding flow meter with neat figures.
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Summarize the comparison of Ultrasonic flow meter, Rotameter and Electromagnetic flow meter with respect to their flow measurement range, principle and applications.
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