JNTU
JNTU B.Tech III ELECTRICAL AND ELECTRONICS INSTRUMENTATION Previous Question Paper (February - 2023 - 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
Define systematic error.
Answer
A systematic error is a type of measurement error that consistently deviates from the true value in a specific direction. These errors are predictable and typically arise from known causes such as instrument calibration defects, environmental conditions, or observational bias.
What is standard? What is the different classification of standards?
Answer
A standard is a physical representation of a unit of measurement, used as a reference to define, realize, conserve, or reproduce a unit or one or more values of a quantity. Standards are classified into four categories:
- International standards
- Primary standards
- Secondary standards
- Working standards
Give few applications of Cathode ray oscilloscope.
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Classify the various types of Digital Voltmeter.
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What is the working principle of spectral display?
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List out the applications of wave analyzer.
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Define piezo electric effect.
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What are the advantages of electrical transducer?
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Write some methods of measurement of temperature.
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How could you measure vacuum using gauges?
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Part B
Define and explain any five static characteristics of measuring systems.
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Describe the Statistical Analysis of Random Errors in detailed.
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Explain about pulse modulation and pulse code modulation in detail.
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A signal x(t) = sinc (150πt) is sampled at a rate of i) 100 Hz, ii) 200 Hz, and iii) 300Hz. For each of these cases, explain if you can recover the signal x(t) from the sampled signal.
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Describe with neat diagram the construction and working of Cathode ray oscilloscope.
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How could you measure phase using lissajous pattern? Explain.
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Draw the circuit diagram of digital phase angle meter and explain the working.
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Explain with neat circuit diagram the working of Microprocessor based ramp type.
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Discuss the working of frequency selective analyzer with a neat sketch.
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Explain the concept of wave analysis and with the help of block diagram explain the construction and working of heterodyne wave analyzer.
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Explain the Total Harmonic distortion in detail.
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With the help of block diagram, explain the construction and working vector impedance meter.
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What is the principle of operation of a capacitive pressure transducer? Explain in detail
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Explain the principle of LVDT accelerometer with neat sketch. Also give its advantages and limitations.
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Explain in detail the signal conditioning of thermocouple output.
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Describe the principle and construction of Piezo electric load cell.
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Define gauge sensitivity and how could you measure it.
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Explain the working of two types of ultrasonic flow meter.
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Explain the pressure measurement for the following categories: i) McLeod gauge ii) Thermal conductivity gauge.
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Write short notes on the following: i) Angular velocity ii) Torque.
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