JNTU
JNTU B.Tech IV METROLOGY INSTRUMENTATION AND CONTROL SYSTEMS Previous Question Paper (May/June - 2019 - R15)
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. Each question carries 10 marks.
PART A
Comment about sensitivity of measuring instruments.
Answer
Sensitivity is defined as the ratio of the change in output of an instrument to the corresponding change in the input. A high sensitivity indicates that the instrument produces a large output change for a small input change, allowing for finer measurement resolution.
Give the sources of errors found in measuring instruments.
Answer
Errors in measuring instruments typically arise from three primary sources: 1) Gross errors caused by human mistakes in reading or recording, 2) Systematic errors resulting from instrument defects, environmental changes, or observational bias, and 3) Random errors due to unpredictable fluctuations in experimental conditions.
Give the working principle of Mcleod pressure gauge.
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Explain different principles used for temperature measurement.
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Explain the need for calibration in measuring instruments.
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Define gauge factor.
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What is the working principle of stroboscope?
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What are the limitations of rotameter?
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Give the classification of control system.
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Give the applications of servomechanism.
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PART B
Considering Bourdon tube pressure gauge as an example, give the functional description and generalized configuration.
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Explain the methods to minimize or eliminate errors in measuring instruments.
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With the help of a diagram explain the construction and working of pyrometer.
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Explain the process of measurement of low pressure ionization pressure gauges.
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Explain the principle of working of thermocouple.
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Explain the construction and working of sling psychrometer.
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Explain how a piezo electric transducer is used for displacement measurement.
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Describe the arrangement used in cryogenic fuel level indicators.
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Explain the use of strain gauges for the measurement of tensile strains.
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What is a inductive transducer? How it can be used for displacement measurement?
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Explain the working of laser Doppler anemometer.
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Explain the working of electrical tachometer.
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What is seismic principle? Explain the working of accelerometer.
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What are torsion meters? Explain their working.
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With the help of block diagrams explain the working of temperature control system.
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With the help of block diagrams explain the working of speed control system.
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