B.E-B.E Electronics and Tele-Communication Engineering Measurements and Instrumentation(Sathyabama University, Chennai, Tamil Nadu-2010)
Friday, 23 August 2013 03:37Duraimani
(Established under section 3 of UGC Act,1956)
Course & Branch :B.E - ETCE
Title of the Paper :Measurements & Instrumentation Max. Marks :80
Sub. Code :525503 Time : 3 Hours
Date :19/04/2010 Session :AN
PART - A (10 x 2 = 20)
Answer ALL the Questions
1. What does systematic error of instruments mean?
2. Explain the term Instrumentation and Instruments.
3. Why are digital instruments preferred over analog instruments?
4. List the various detectors used for AC bridges.
5. Give two advantages of bridge circuit.
6. What is sample /hold circuit?
7. What is a data logger?
8. State the principle and operation of Piezoelectric transducer.
9. What are the advantages of photo-voltaic cell?
10. What are photo-transistors?
PART – B (5 x 12 = 60)
Answer All the Questions
11. Explain in detail about the static characteristics in measurement.
(or)
12. Explain in detail the following.
(a) Instrument Errors (4)
(b) Limiting errors (4)
(c) Environmental errors (4)
13. (a) Sketch the basic construction of PMMC instrument and explain its operation.
(b) A PMMC instrument with FSD=100μA and Rm=1KΩ is to be employed as voltmeter with FSD=100V (RMS). Silicom diodes are used in the bridge rectifier circuits.
(or)
14. Explain in detail about the working of a Spectrum Analyser in detail.
15. (a) Explain in detail the working of Hay’s bridge. (8)
(b) Find the series equivalent inductance of the n/w that causes the Hay’s bridge to null with the following constants.
w=3000rad/sec, R1= 2KΩ, R2=10KΩ, C1=1μF, R3=1KΩ (4)
(or)
16. Explain the working of an Instrumentation amplifier and Differential amplifier in detail.
17. Explain with neat sketches the working of a DSO.
(or)
18. What are the various methods of Recording?
Explain the principle of Tape recording.
19. Explain the working principle of LVDT in detail.
(or)
20. What are flow meters? Explain the working of Magnetic and Turbine flow meters in detail.
| Earning: ₹ 3.10/- |
