SRM University 2007 B.Tech Electronics and Communications Engineering Bank : Electronic Measurement

S.R.M. Institute of Science & Technology
School of Electronics & Communication Engineering
ques. Bank

Subject Code : EC305
Subject Name : Electronic Measurement &Instrumentation
Year & Sem : III Year Vth Sem (ECE)

UNIT I

PART A
1. Define the term “True value”. What is “Eampler method” and Why is it used in measurements?
2. Define Accuracy.
3. Define Precision.
4. Define Static Sensitivity.2
5. Define Resolution.
6. A particular ammeter requires a change of 2A in its coil to produce a change in deflection of the pointer by 5mm. Determine its sensitivity and deflection factor.
7. Define Fidelity.
8. What are Guarantee Errors?
9. Define Relative Limiting fault.
10. A 0-50V Voltmeter is specified to be right within ?1% of full scale. compute the limiting fault when the instrument studying is 15V.
11. A 0-10A ammeter has a guaranteed accuracy of 1.5% of full scale studying. The current measured by the instrument is 2.5A. compute the limiting values of current and percentage limiting fault.
12. Define i) Arithmetic mean ii) Standard deviation.
13. What is an error? elaborate the sources and kinds of errors?
14. What is a bridge?
15. What are the advantages of Bridge Circuit?
16. State the Balance condition for a bridge circuit in general form, polar form and rectangular form.
17. Define the dynamic response of a system and distinguish ranging from steady state & transient response.
18. What are the various standard inputs for studying the dynamic response of a system? describe and sketch them.
19. Define i) Rise Time ii) Setting Time
20. What are undamped system and critically damped systems?
21. What is meant by sliding balance?
22. The 4 impedance of an a.c bridge are as follows : Z1=400? ?500 ; Z2=200? ?400; Z3=800? ?-500;Z4=400? ?200.Find out whether the bridge is balanced or not.
23. Draw the Gaussian Probability Curve.
24. How are Gross Errors rectified?
25. What are residual errors?
26. Define multi sample test and single-sample test.
27. What are the causes of instrumental errors?
28. A 0-150V Voltmeter has a guaranteed accuracy of one Percent of full scale studying. The voltage measured by this instrument is 75v. compute the limiting fault in percent.
29. What is the significance of significant figures.
30. Define peak overshoot.
31. Define static fault. Distinguish reproducibility repeatability?
32. What is calibration?






PART-B

1. Discuss the different kinds of errors possible in an instrument.
2. Discuss in detail the different dynamic characteristics of a measuring system.
3. Define the subsequent i) Arithmetic mean ii) Variance iii) Standard deviation iv) avg. Deviation v)Gaussian Probability curve.

Earning:   Approval pending.