GTU Electrical Measurements & Measuring Instruments - May 2015 Exam Question Paper

GTU Electrical and Electronic Engineering (Semester 3)
Electrical Measurements & Measuring Instruments
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) What is standard? Explain different types of standards.

7 M

1 (b) Explain the static characteristics of an instrument.

7 M

2 (a) Describe the construction and working of PMMC instrument. Derive the equation for deflection if the instrument is spring controlled.

7 M

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

2 (b) Describe the various types of errors in measurement system.

7 M

2 (c) Explain electro dynamic Wattmeter.

7 M

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

3 (a) Describe the operation of Kelvin's bridge.

7 M

3 (b) Explain working principal of Q meter

7 M

3 (c) Explain how an AC bridge circuit operates and derive an expression for the unknown parameters.

7 M

3 (d) Explain the working of a digital frequency meter with block diagram

7 M

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

4 (a) Explain the basic components of a magnetic tape recorder for instrumentation applications using direct recording techniques. Describe its advantages and disadvantages.

7 M

4 (b) Explain different methods for data transmission in telemetry systems.

7 M

4 (c) Explain the construction wire wound strain gauges and derive the expression for the gauge factor.

7 M

4 (d) Explain in detail harmonic analyzes.

7 M

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

5 (a) Describe the construction, theory and working of thermocouples.

7 M

5 (b) Explain the construction and principle of working of a linear voltage differential transformer (LVDT). Explain how the magnitude and direction of the displacement of core of an LVDT detected?

7 M

5 (c) Write a short note on digital storage oscilloscope.

7 M

5 (d) Describe the working of a galvanometric type of strip chart recorder. What are the different types of tracing systems used in it? Explain with the help of suitable diagrams.

7 M

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