Download GTU BE/B.Tech 2019 Winter 3rd Sem New 2130903 Electrical Measurement And Measuring Instruments Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Winter 3rd Sem New 2130903 Electrical Measurement And Measuring Instruments Previous Question Paper

1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ? III (New) EXAMINATION ? WINTER 2019
Subject Code: 2130903 Date: 3/12/2019

Subject Name: Electrical Measurement and Measuring Instruments
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:

1. Attempt all questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.

MARKS

Q.1 (a) Explain CT and PT.

03
(b) Explain electrodynamometer type wattmeter.


04
(c) Explain Maxwell?s inductance-capacitance bridge for measurement of
inductance. Derive bridge balance equation and draw vector diagram.
07
Q.2 (a) What is a transducer? Give classifications of transducer.

03
(b) Explain LVDT. 04
(c) Derive the bridge balance equation of anderson?s bridge and also
provide advantages, dis-advantages & limitations of it.
07
OR
(c) Derive the bridge balance equation of hay?s bridge and also provide
advantages & dis-advantages of it.
07
Q.3 (a) Explain block diagram of a general telemetry system. 03
(b) Explain principle of operation of thermo couple instrument. 04
(c) Describe the constructional detail of attraction type moving iron
instruments with help of diagram. Also derive equation of deflection
if spring control is used.
07
OR
Q.3 (a) State the applications of power analyzers. 03
(b) Explain controlling systems used in an instrument.

04
(c) Derive the equation for gauge factor of a resistive strain gauge in
terms of Poisson?s ratio.

07
Q.4 (a) Define the following terms:
i) Accuracy, ii) Sensitivity, iii) Threshold

03
(b) Explain any one pressure measurement techniques in detail.

04
(c) Explain construction, working advantages and disadvantages of RTD
with neat diagram.
07
OR
Q.4 (a) Explain DMM with schematic diagram.

03
(b) Explain the various effects with which deflecting torque is produced.

04
(c) Describe digital storage oscilloscope with schematic block
diagram and state its applications.
07
Q.5 (a) Define drift, sensitivity and true value. 03
(b) Explain the term ?Total harmonic distortion?? and describe Tuned
circuit harmonic analyzer.
04
(c) Prove that deflection of electrodynamometer type wattmeter is
proportional to power consumed.

07
OR

Q.5 (a) Explain the loss of charge method for measurements of high
resistance.

03
(b) Distinguish clearly between accuracy and precision. 04
(c) Explain construction and working of Megger. 07
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