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EC-2351-MEASUREMENT

AND INSTRUMENTATION

APRIL / MAY

2011

QUESTION

PAPER

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B.E. / B.Tech. DEGREE EXAMINATION, APRIL/MAY 2011

Sixth Semeste

E!ect"#ics $#% &"mm'#ic$ti"# E#(i#eei#(

E& 2)*1 + MEASREMENTS AND INSTRMENTATION

-Re('!$ti"# 200

Time Thee h"'s M$xim'm 100 m$sA#se ALL 3'esti"#s

PART A + -10 4 2 5 20 m$s

1. Mention the significance of measurements.

2. Compare Moving coil with Moving iron instruments.

3. Draw the internal structure of CRT and list its functions.

4. What are the two significant prolems with diodes when used for R!

rectification"

#. What is $ar%hausen Criteria for sustained oscillation"

&. Draw the loc% diagram of spectrum anal'(er.

). What are the advantages of digital instruments over analog instruments"

*. What are the different t'pes of Digital +oltmeter"

,. Draw the loc% diagram of Digital Data -cuisition /'stem.

10. What are the %e' features of full' automatic digital instruments"

PART B + -* 4 16 5 0 m$s

11. a i What is the need for standards of measurements" ow the' are

classified" 5plain *

ii ow the un%nown freuenc' is measured using Wein ridge

method" *

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i What are the different t'pes of errors in measurement" 5plain. *

ii ow do 'ou measure the un%nown inductance using a' $ridge" *

12. a i Draw the loc% diagram of sampling oscilloscope and e5plain the

principle. *

ii 5plain the measurement of ualit' factor of a coil. *

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i Discuss the measurement of DC and -C voltages and currents

using an lectronic Multimeter. *

ii Draw the loc% diagram of True RM/ reading voltmeter and

e5plain its operation. *

13. a i 5plain how function generator generates sine wave7 triangular

wave and suare wave. *

ii Draw the loc% diagram of sweep8freuenc' generator and e5plain.

*

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i What is wave anal'(er" ow it anal'(es the harmonics" 5plain. *ii 5plain the vector networ% anal'(er and list its application. *

14. a i ow computer controlled measurement s'stem is used for testing

radio receiver" *

ii What is virtual instrument" 9ist the advantages of virtual

instrument over conventional instrument *

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i With necessar' diagrams e5plain Ramp t'pe digital voltmeter. *

ii Draw the loc% diagram of digital freuenc' meter and e5plain. *

1#. a i What are the factors to e considered while interfacing transducers

to electronic control and measuring s'stems" *

ii Draw the loc% schematic representation of the : 4**

instrumentation us and e5plain. *

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i 5plain the optical time domain reflectometer with a neat diagram.

*

ii Write a detailed note on data loggers. *