EC2351 Measurements & Instrumentation B.E Model Question Paper : aalimec.ac.in
Name of the College : Aalim Muhammed Salegh College of Engineering
University : Anna University
Department : Electronics and Communication Engineering
Subject Code/Name : EC2351 Measurements & Instrumentation
Degree : B.E
Year : III
Sem :VI
Document Type : Model Question Paper
Website : aalimec.ac.in
Download : https://www.pdfquestion.in/uploads/aa…tion-Paper.pdf
Aalim MEC Measurements & Instrumentation Question Paper
Model Question Paper 1 :
Part A : (10 × 2 = 20 Marks)
Paper – I
1. Mention the significance of measurements.
2. Compare Moving coil with Moving iron instruments.
3. Draw the internal structure of CRT and list its functions.
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4. What are the two significant problems with diodes when used for RF rectification?
5. What is Barkhausen Criteria for sustained oscillation?
6. Draw the block diagram of spectrum analyzer.
7. What are the advantages of digital instruments over analog instruments?
8. What are the different types of Digital Voltmeter?
9. Draw the block diagram of Digital Data Acquisition System.
10. What are the key features of fully automatic digital instruments?
Part B : (5 × 16 = 80 Marks)
11. (a) (i) What is the need for standards of measurements? How they are classified? Explain (8)
(ii) How the unknown frequency is measured using Wien bridge method? (8)
Or
(b) (i) What are the different types of errors in measurement? Explain. (8)
(ii) How do you measure the unknown inductance using Hay’s Bridge? (8)
12.(a) (i) Explain the types of storage oscilloscope with a neat block diagram. (16)
Or
(b) (i) Discuss the measurement of DC and AC voltages and currents using an Electronic Multimeter. (8)
(ii) Draw the block diagram of True RMS reading voltmeter and explain its operation. (8)
13. (a) (i) Explain how function generator generates sine wave, triangular wave and square wave. (8)
(ii) Draw the block diagram of sweep-frequency generator and explain. (8)
Or
(b) (i) What is wave analyzer? How it analyzes the harmonics? Explain. (8)
(ii) Explain the vector network analyzer and list its application. (8)
14. (a) (i) How computer controlled measurement system is used for testing radio receiver? (8)
(ii) What is virtual instrument? List the advantages of virtual instrument over conventional instrument (8)
Or
(b) (i) With necessary diagrams explain Ramp type digital voltmeter. (8)
(ii) Draw the block diagram of digital frequency meter and explain. (8)
15. (a) (i) What are the factors to be considered while interfacing transducers to electronic control and measuring systems? (10)
(ii) Explain data loggers(6)
Or
b. Explain the working operation of
(i) optical time domain reflectometer(6)
(ii)Auto ranging power meter(10)
Paper – II
Part A : (10 × 2 = 20 Marks)
1. A set of independent current measurements were recorded as 10.03,10.10,10.11,10.08.Calculate the range of an error.
2. How is international standard of length is defined?
3. Compare analog storage oscilloscope with digital.
4. What is the function of an electron gun?
5. Define sweep
6. What is intermodulation distortion?
7. Why Schmitt trigger is used in digital frequency meter?
8. Draw the block diagram of Integrated DVM
9. What is the need for data loggers’
10. List the elements of digital data acquistion’
Part B : (5 × 16 = 80 Marks)
11. (a) (i) Explain the working operation for PMMC & derive it’s torque equqtion. (8)
(ii) Explain the types of errors (8)
Or
(b) (i) What are the conditions for bridge balance? (8)
(ii) How do you measure the unknown inductance using Maxwell’s Bridge & also draw the phasor diagram? (8)
12.(a) (i) Draw the block diagram of sampling oscilloscope and explain the principle. (8)
(ii) How to measure large Capacitors& small coils using Q-meter. (8)
Or
(b) (i ) Explain vector impedance meter with a neat block diagram(8)
(ii) How to measure RF voltage &power using RF millivoltmeter? (8)
13. (a) (i) Explain RF signal generator. (8)
(ii) Draw the block diagram of Digital spectrum analyzer and explain. (8)
Or
(b) (i) Explain frequency selective wave analyzer?
(ii) How the fundamental frequency is suppressed using fundamental suppression distortion analyser. (8)
14. (a) (i) Explain how to extend the frequency range of counter?(8)
(ii) How to make automatic polarity indication& automatic ranging in digital instrumentation(8)
Or
(b) (i) With necessary diagrams explain types of digital voltmeter. (16)
15. (a) (i) With neat diagram explain the Shaft encoders(8)
(ii)) Draw the block schematic representation of the IEEE 488 instrumentation bus and explain it.(8)
Or
b. Explain the following
i.A/D multiplexing(5)
iiD/A multiplexing(5)
iii.Isolation amplifier(6)