JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech III ELECTRICAL AND ELECTRONICS INSTRUMENTATION Previous Question Paper (March - 2024 - R16)
Note: i) Question paper consists of Part A, Part B. ii) Part A is compulsory, which carries 25 marks. iii) In Part B, Answer any one question from each unit.
Part A
Define Resolution.
Answer
Resolution is defined as the smallest change in the measured physical quantity that can be detected and displayed by an instrument. It represents the smallest increment of the input signal that produces a detectable change in the output reading.
Explain about Pulse code Modulation.
Answer
Pulse Code Modulation (PCM) is a method used to digitally represent sampled analog signals. The process involves three main steps:
- Sampling: The continuous analog signal is sampled at discrete time intervals.
- Quantization: Each sample is assigned a discrete value from a finite set of levels.
- Encoding: Each quantized value is converted into a binary code (a sequence of pulses) for transmission or processing.
List the different types of Digital voltmeters.
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Explain the principle of Digital Frequency Meter.
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Explain the need of Q meter.
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What is the principle of Wavemeter?
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List the characteristics of Transducers.
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Summarize the advantages of Electrical Transducers.
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Define Gauge sensitivity.
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Explain the principle of measuring strain using strain gauge.
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Part B
Compare static and dynamic performance characteristics.
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Explain about Pulse modulation.
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Define error. And classify errors in measurement.
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How can you analyze random errors? Explain in detail.
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How can you measure voltage using Microprocessor based ramp type DVM? Explain.
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Compare active and passive CRO probes.
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Inspect the principle of working of successive approximation type DVM.
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How can you measure Phase using Lissajous patterns? Elaborate.
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Draw the block diagram of Heterodyne wave analyzer and explain its working.
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Inspect the Principle of operation of RMS responding voltmeter.
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Explain the working of Total Harmonic distortion analyzer.
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Conclude the working principle of average responding voltmeter.
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Inspect the principle of working of Synchros.
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Explain the principles of operation of piezo electric transducers.
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Explain the principle of operation of LVDT. Outline its applications.
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Compare Thermocouples and Thermistors.
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Inspect the principle of operation of Hot wire Anemometer.
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How could you measure Liquid level? Explain.
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How could you measure Acceleration ? Elaborate.
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How could you measure Flow using Rotameter? Explain.
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