JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech III ELECTRONIC MEASUREMENT AND INSTRUMENTATION Previous Question Paper (August/September - 2024 - R16)
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
Write the range extension of AC voltmeters.
Answer
The range of an AC voltmeter is extended by using a potential transformer (PT) for high voltages or by using a series multiplier resistor (for low-frequency applications) in conjunction with a rectifier-based meter movement.
Define Sensitivity, Accuracy and Precision.
Answer
Sensitivity is the ratio of the change in output to the change in input. Accuracy is the closeness of a measured value to the true or accepted value. Precision is the measure of reproducibility or consistency of a set of measurements taken under the same conditions.
Mention the different types of distortion.
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Draw the basic wave analyzer and explain.
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What are the features of CRT?
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What are the different controls available on CRO panel?
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What is a capacitive transducer?
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List the applications of LVDT.
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How do you measure moisture?
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List out the advantages and disadvantages of Maxwell’s bridge.
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Part B
Draw the circuit diagram of Ohmmeters series type, and shunt type and explain its operation in detail.
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Define and elaborate the following: i) Response ii) Fidelity
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What are the dynamic characteristics of measurement systems? Explain.
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Describe briefly about total harmonic distortion.
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Discuss the frequency range of different types of signal analyzers.
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What are the applications of a Spectrum analyzer?
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Sketch and explain in detail about the Spectrum analyzer.
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Explain the frequency and phase measurement using Lissajous figures.
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Develop an expression for deflection D in CRO, which is the deflection of the electron beam.
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Draw the internal structure of CRT and list its functions.
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Draw the circuit diagram of delay line circuit and explain its operation.
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Discuss about temperature transducers and RTD.
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Draw and explain the resistance thermometer.
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An ac LVDT has the following data: Input = 6.3 V, Output = 5.2 V, range ± 0.5 in. Determine
Calculate the output voltage vs Core position for a core moment going from + 0.45 in. to – 0.30 in.
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The output voltage when the core is -0.25 in. from the Centre.
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Draw the Wien Bridge and derive the expression for the frequency of excitation signal at balance signal.
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Draw and explain the block diagram of Digital Data Acquisition System.
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Discuss about basic principle of measure humidity.
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