Download GTU BE/B.Tech 2018 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) 2018 Winter 3rd Sem New 2130903 Electrical Measurement And Measuring Instruments Previous Question Paper

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1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ?III (New) EXAMINATION ? WINTER 2018
Subject Code:2130903 Date:05/12/2018

Subject Name:Electrical Measurement and Measuring Instruments

Time:10:30 AM TO 01:00 PM Total Marks: 70

Instructions:

1. Attempt all questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.


Q.1 (a) Define the following terms:
i) Resolution, ii) Sensitivity, iii) Threshold
03
(b) Define error and classify it in detail. 04
(c) Define transducer and explain transducer selection factors. 07

Q.2 (a) Explain advantages and limitations of Wheatstone?s bridge. 03
(b) Derive the generalized equation for bridge balance condition of an a.c.
bridge with necessary diagram.
04
(c) Describe the principle and characteristics of LVDT with necessary diagram. 07
OR
(c) Write a technical note on : Hall effect transducer. 07
Q.3 (a) List advantages of digital voltmeter. 03
(b) Compare analog and digital instruments. 04
(c) Explain Maxwell?s bridge with necessary bridge balance equation and
vector diagram.
07
OR
Q.3 (a) Explain important features of a power analyzer. 03
(b) Write a technical note on : Electronic Multimeter. 04
(c) Draw the circuit diagram of Kelvin?s double bridge used to measure low
resistance. Also derive its bridge balance condition.
07
Q.4 (a) Define : i) Active transducer ii) Passive transducer iii) Inverse transducer 03
(b) Explain piezoelectric transducer. 04
(c) Explain the construction and working of moving iron meter. Derive its
torque equation.
07
OR
Q.4 (a) Describe the use of multiplier in voltmeters. 03
(b) Compare Moving coil and Moving iron instruments. 04
(c) Derive the equation for gauge factor of a resistive strain gauge in terms of
Poisson?s ratio.
07
Q.5 (a) Why PMMC instruments cannot be used for a.c. measurements? 03
(b) Explain advantages and disadvantages of instrument transformers. 04
(c) Define Telemetry. Explain with necessary block diagram the basic
telemetry system.
07
OR

Q.5 (a) Explain objective and requirements of recording data. 03
(b) Explain principle of operation of basic strip chart recorder. 04
(c) Explain the use of single wattmeter in measurement of 3-phase power. 07

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