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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-VII (OLD) EXAMINATION — WINTER 2018
Subject Code: 170904 Date: 29/11/2018
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Subject Name: Industrial Instrumentation
Time: 10:30 AM TO 01:00 PM Total Marks: 70
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Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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Q.1 (a) Explain the following characteristics of a Transducer. [07]
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(1) Linearity (i1) Resolution (iii) Sensitivity (iv) Threshold (v) Repeatability
(vi) Calibration (vii) Hysteresis.
(b) What is Transducer? Explain factors influencing the choice of transducers. [07]
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Q.2 (a) What is Gauge factor and Piezo resistive effect? Derive the expression for that in terms of passion’s ratio. [07]
(b) Write short note on Hall effect transducer. [07]
OR
(b) Differentiate unbonded and bonded type strain gauge. How is the temperature compensation carried out using strain gauge in a bridge circuit? [07]
Q.3 (a) Explain the construction and working of LVDT used for measurement of displacement. [07]
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(b) Explain construction and working principle of Thermocouple. Also explain Cold junction compensation. [07]
OR
Q.3 (a) State different methods for torque measurement. Explain any one in detailed. [07]
(b) State different type of Load cell used for force measurement. Explain any one in detail. [07]
Q.4 (a) Explain construction and working of Piezoelectric pressure transducer. [07]
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(b) Write short note on Hot wire anemometer. [07]
OR
Q.4 (a) Explain how inductive transducer used for Linear measurement and Capacitive transducer used for angular displacement. [07]
(b) Describe with neat sketch the construction and working of Rotameter. State Advantages and Disadvantages of Rotameter. [07]
Q.5 (a) Write short note on Venturi tube. [07]
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(b) Write short technical note on X-Y Recorders. [07]
OR
Q.5 (a) Explain n-Channel Data Acquisition System with block diagram. [07]
(b) What is sample and hold circuit? Why it is needed? Explain with circuit diagram. [07]
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