Enrolment No.
Subject Code: 3132405
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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER- III (New) EXAMINATION — WINTER 2019
Subject Name: Measurement & Instrumentation
Date: 28/11/2019
Time: 02:30 PM TO 05:00 PM
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Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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- Define (1) Accuracy (2) Sensitivity (3) Dead Zone
- Differentiate Active & Passive transducer.
- Explain working principle of Permanent Magnet Moving Coil based measurement instrument.
Marks
03
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04
07
-
- Draw only diagram of Analog AC voltmeter.
- Explain the procedure for extending range of ammeter.
- Write a note on: Digital Volt Meter.
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03
04
07
-
- Discuss the usefulness of CT & PT for measurement.
- Draw internal construction of oscilloscope.
- Discuss Digital Oscilloscope in brief.
07
OR
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- Draw & discuss block diagram of signal conditioning.
- Explain the use of voltage & current probes in oscilloscope.
- Explain the procedure to measure time & frequency in oscilloscope.
03
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04
07
-
- Discuss the circuit used to converter analog quantity into digital (A/D converter).
- Enlist the requirement of signal conditioning in measurement.
- Discuss characteristics of digital display.
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03
04
07
-
- Explain the principle of 3-Phase wattmeter for 3-phase power measurement.
- Discuss in brief: sample & hold circuit.
- Classify display devices & explain any one in brief.
03
04
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07
OR
-
- Explain working principle of LCR meter with necessary block diagram.
- Discuss the principle of thermopile.
- Discuss (1) Thermistor (2) Thermocouple
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03
04
07
-
- Explain capacitive level measurement transducer. Support your answer with diagrams.
- Draw only diagram of optical pyrometer used to measure temperature.
- Discuss principle of LVDT used to measure displacement.
03
04
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07
OR
-
- Enlist & explain pressure measurement transducers.
03
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04
07
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