Wednesday, January 12, 2022

Dr.A.P.J.Abdul Kalam University BE III SEM ALL BRANCH DEC 2020 Measurements and Instrumentation [EC224] Dec - 2020 Question Paper

Dr.A.P.J.Abdul Kalam University Old Question Papers

Bachelor of Engineering

Third Semester Main Examination, Dec-2020

Measurements and Instrumentation [EC224]

Branch-EC

Time: 3:00 Hrs Max Marks 70

Note : Attempt any five questions. All questions carry equal marks.

Q.1 (a) Explain DC ammeter and AC ammeter.

(b) Explain multi-meter, Power meter and Bolometer.

Q.2 (a) Explain different parts of CRO with suitable diagram.

(b) Describe AC voltmeter using rectifier.

Q.3 (a) Explain digital voltmeters and multi-meters.

(b) Write down advantages of digital instrument over analog instrument.

Q.4 (a) Explain analog to digital conversion.

(b) Explain digital to analog conversion.

Q.5 (a) Explain sweep frequency generator and square wave generator.

(b) What is Beat frequency oscillator.

Q.6 (a) Write down the liquid crystal display and difference between LED TV and LCD TV.

(b) Explain the basic structure of LED.

Q.7 (a) Write down the RVDT and RTD.

(b) Explain thermistor and thermocouple.

Q.8 (a) Write down the photo-diode and photo transistor.

(b) What is LVDT? Explain it

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