GTU Electronic Measurement & Instrumentation - May 2015 Exam Question Paper

GTU Electronics and Communication Engineering (Semester 4)
Electronic Measurement & Instrumentation
May 2015

Total marks: --
Total time: --

INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary

1 (a) Define and explain the following static characteristics of an instrument.
1) Accuracy 2) Linearity 3) Stability 4) Resolution

7 M

1 (b) Write a short note on DSO.

7 M

2 (a) (i) Find the equivalent parallel Resistance and Capacitance that causes a Wein Bridge to null with following component values. R1=3.1 KΩ, C2=5.2μF, R2=25KΩ, f=2.5KHz, R4=100KΩ.

4 M

2 (a) (ii) Compare AC and DC Bridges.

3 M

Answer any one question from Q2 (b) & Q2 (c)

2 (b) Differentiate between primary and secondary transducers with the help of suitable examples.

7 M

2 (c) Explain Gating Error, Time Base Error and Trigger Level Error.

7 M

Answer any two question from Q3 (a), (b) & Q3 (c), (d)

3 (a) With neat diagram explain the various parts of CRT.

7 M

3 (b) What is Data Acquisition? What are the basic objectives of DAS?

7 M

3 (c) Explain basic principle of oscillation .What is Barkhausen Criterion?

7 M

3 (d) Explain different types of potentiometer and list advantages and disadvantages of potentiometer transducer.

7 M

Answer any two question from Q4 (a), (b) & Q4 (c), (b)

4 (a) Write a note on lock-in amplifier.

7 M

4 (b) Describe A.F. sine and square wave generator with suitable diagram and working.

7 M

4 (c) What is wide band sweep generator? What are its basic elements and explain its working with a block diagram.

7 M

4 (d) Write short note on wave analyzer.

7 M

Answer any two question from Q5(a), (b) & Q5 (c), (d)

5 (a) Explain the generalized block Schematic of Digital Data Acquisition System and list out its advantages over Analog Data Acquisition System.

7 M

5 (b) What is LVDT? Write its merits and demerits .Discuss its two applications.

7 M

5 (c) What is optical isolator? Write its characteristics and advantages.

7 M

5 (d) Draw and Explain the block diagram of Digital Frequency Meter.

7 M

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