Download AKTU B-Tech 4th Sem 2015-16 NEC 403 Electronic Measurements Instrumentation Question Paper

Download AKTU (Dr. A.P.J. Abdul Kalam Technical University (AKTU), formerly Uttar Pradesh Technical University (UPTU) B-Tech 4th Semester (Fourth Semester) 2015-16 NEC 403 Electronic Measurements Instrumentation Question Paper

Printed Pages: 4 NEC-403
(Following Paper ID and Roll No. to be ?lled in your
B.TECH.
Theory Examination (Semester-IV) 2015-16
ELECTRONIC MEASUREMENTS
& 1N STRUMENTATION
Time : 3 Hours Max. Marks : 100
Section-A
Q1. Attempt all parts. A11 carry equal marks. Write answer
of each part in short. (2X10=20)
a. De?ne mndom error and Gross error with suitable ex-
ample.
b. De?ne accuracy and precision with suitable example.
c. What do you mean by Dissipation factor? Explain.
d. What is Quality factor and its importance in measure-
ment.
(1) ' P.T.O.
306/33566/1550

Q2.
De?ne importance of Kelvin double bridge over
Wheatstone bn'dge.
Explain rise time and fall time with neat diagram.
What do you mm by pulse distortion?
Why triggering is needed in CRO?
What do you understand by Instrument calibration?
How Emitter-Follower structure reduces Voltmeter
loading effect?
Section-B
Attempt any ?ve questions from this section.
(a)
(loxs=so)
De?ne systematic errors in details. A batch of resis-
tors each has a nominal resistance of 330 Q are to be
tested and classi?ed as 15% and i10% components
are speci?ed at 25?C, and their temperature coef?cient
is -300 ppm/?C. Calculate the maximum and minimum
resistance for these components at 100?C and Calculate
themaximumandminimumabsoluteresistanoeforeach
case.
(2)
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(b)
(0)
(d)
(e)
(f)
(h)
Explain the construction of PMMC instrument.
Mathematically prove that the scale of such an
instnnnentislinear.
Design a mulli range FET Voltmeter circuit and explain
its working with diagram.
Drive an expression for ?nding unknown resistance and
Inductance for Maxwell Bridge.
Explain construction and working of X-Y recorder.
Write short note on DSO. Compare it with Sampling
Oscilloscope.
Explain the construction and working of Q?meter.
How dielectric loss and unknown capacitance are mea-
sm-ed by Schering Bridge?
Section-C
Note: Attempt any two questions from this section.
(15X2=30)
Q3. Explain the following in detail with their diagram:
i.
ii.
Attenuator Probe
1:] Probe
(3) P.T.O.
306/334/66/1650

Q4. Explain construction and working of Galvanometer. A
PMMC instrument with FSD of 100 ?A and a coil resis-
tance of 2kQ is to be converted into a voltmeter. Determine
the required multiplier resistance if the voltmeter is to
measure 35V at full scale. Also calculate the applied volt-
age when the instrument indicates 0.8, 0.5, and 0.2 of FSD
with neat circuit diagram.
Q5. Explain the working procedure of following:
i. Plotter
ii. Sampling Oscilloscope
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