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Reg No.: Name:

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY

Fifth Semester B.Tech Degree Regular and Supplementary Examination December 2020

Course Code: AE303

Course Name: ELECTRICAL MEASUREMENTS AND MEASURING INSTRUMENTS

Max. Marks: 100

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PARTA
Answer any two full questions, each carries 15 marks.
Define any two types of errors in an instrumentation system.
Explain Threshold and Resolution in an instrument.
Differentiate between absolute and working standards.
Elaborate the working of a PMMC type instrument.
Draw the circuit of a rectifier voltmeter and explain its working.
Explain the working of a thermal instrument.
PART ‏تا‎
‎Answer any two full questions, each carries 15 marks.
Demonstrate the measurement of an unknown medium resistance using
Wheatstone’s Bridge.
Explain the principle of operation of a Carey Foster Slide Wire Bridge
Describe the working principle of AC potentiometers.
Explain coordinate type and polar type of AC potentiometers.
Demonstrate the working of Kelvin Bridge stating its advantage.
Explain the working of Schering’s bridge with circuit diagram.
PART C
Answer any two full questions, each carries 20 marks
With a block diagram, describe the working of a DSO.
Describe the working of a strip chart recorder.
What is a thermocouple? Explain the working of thermocouple instruments.
Elaborate the working of a true RMS meter.
Illustrate the working of a Q-meter with a basic circuit and explain any one
measurement method.

With block diagram elaborate the working of a spectrum analyser.

Duration: 3 Hours

Marks
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