JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B. Tech IV INSTRUMENTATION AND CONTROL SYSTEMS Previous Question Paper (December - 2019 - R15)
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. Each question carries 10 marks and may have a, b, c as sub questions.
Part A
What is the role variable conversion element of a measuring instruments.
Answer
The variable conversion element transforms the signal from one physical form to another while preserving the information content of the signal. It is essential when the output of the primary sensing element is not in a form suitable for the next stage of the measurement system.
What is the importance of dynamic performance characteristics of measurement?
Answer
Dynamic performance characteristics describe how an instrument responds to time-varying inputs. They are crucial for determining the fidelity of measurement in transient conditions, identifying the speed of response, and ensuring the system can track rapid changes without significant lag or distortion.
Explain the working principle of thermal conductivity gauges.
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Explain the principle of working of pyrometer
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Differentiate between contact and Non-contact type tachometer.
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What are the mechanical methods to measure the vibrations and explain in brief?
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List out the salient features of a semi-conductor type strain gauge.
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Explain the applications of delta type strain gauge rosettes.
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List the several control devices with which you are familiar.
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Differentiate between open and closed loop control systems.
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Part B
Explain the various static characteristics of a measurement system in detail.
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Define measurement and explain its significance in our daily life.
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Discuss the various types of errors found in instruments.
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What are the differences between accuracy and uncertainty?
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Discuss the following transducers with respect to their construction, working and characteristics.
Capacitance
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Ionization
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Explain the temperature measurement by thermocouples.
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Explain the temperature measurement by resistance thermometers.
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List out the various equipment for measurement of flow. Explain anyone them in brief.
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Distinguish between the direct and indirect modes of level measurement. Discuss in brief about the methods.
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Explain the working of ultrasonic flow meters. Explain the different techniques used for measurement of flow velocity.
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What are the advantages and disadvantages of these flow meters?
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Explain the construction and working of Water Vapour recorder with a sketch.
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Explain mechanical torsion meter and derive its equation.
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Explain the measurement of humidity by dew point meter in detail.
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Discuss about torque measuring methods using dynamometers.
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What are the requirements of control system?
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Describe the operation of a driver driving an automobile on the road and identify the components, input and output of the human system.
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Classify the elements in control system. Explain about position control systems with neat sketch.
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Write short notes on temperature control system.
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