PTU B.Tech ECE 3rd Semester May 2019 57505 ELECTRONIC MEASUREMENT AND INSTRUMENTATION Question Papers

Total No. of Pages : 02

Total No. of Questions : 09

B.Tech.(?) (2011 & Onwards) (Sem.-3)

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ELECTRONIC MEASUREMENT AND INSTRUMENTATION

Subject Code : EC-203

M.Code: 57505

Time: 3 Hrs.

Max. Marks : 60

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INSTRUCTION TO CANDIDATES :

1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.

SECTION-A

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Q1 Answer briefly :

1. What are the display devices used in digital instruments.
2. Give the three basic requirement of transducer.
3. Distinguish between LCD and LED.
4. Describe the features of Nixie tube with its diagram.

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5. What is the full form of VTVM?
6. Why are CT and PT called instrument transformers?
7. Compare AM verses FM Telemetry.
8. What are data acquisition systems also explain its necessity?
9. How is harmonic distortion or distortion factor defined? Define the various methods to measure the harmonic distortion.

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10. What is transducer? Explain the difference between sensor and transducer.

SECTION-B

Q2 What is multiplexing in telemetry system? Explain the principle of frequency division multiplexing.

Q3 Explain the working principle of Weston frequency meter.

Q4 Discuss the working of Maxwell's bridge for measurements of inductance. For what range of Q-factor of the coil, the bridge is suitable?

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Q5 What is meant by data acquisition system? What are its categories and main elements? Discuss working of a magnetic tape recorder used in DAS?

Q6 What are various methods of data transmission and describe LCR.

SECTION-C

Q7 a) Explain the principle of electrostatic focusing of electron beam in a CRO.

b) What are capacitive transducers? What are their advantages and disadvantages?

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Q8 Explain the construction and principle of working of a linear voltage differential transformer (L.V.D.T.).

Q9 With the help of schematic diagram explain the complete working and construction of CRT.

NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any page of Answer Sheet will lead to UMC against the Student.