Download GTU B.Tech 2020 Summer 3rd Sem 3131706 Measurement And Instruments Question Paper

Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Summer 3rd Sem 3131706 Measurement And Instruments Previous Question Paper

Seat No.: ________
Enrolment No.___________


GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER? III EXAMINATION ? SUMMER 2020
Subject Code: 3131706 Date:28/10/2020
Subject Name: Measurement and 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) Differentiate between indicating and recording instruments with examples.
03

(b) Explain the loading effect in meters
04

(c) What is full form of `PMMC'? Discuss working of PMMC meter with diagram
07


Q.2 (a) How Voltmeter- Ammeter method can be used to measure unknown resistance?
03
Explain in detail.

(b) Explain sweep frequency generator in brief.
04

(c) Explain Wien Bridge to find out unknown frequency.
07


OR


(c) Explain Kelvin double bridge method to find out low resistance.
07
Q.3 (a) Draw RS-232 pin diagram
03

(b) Explain `Potential transformers' with applications.
04

(c) Draw and explain block diagram of Digital Multi-meter.
07


OR

Q.3 (a) Give the differences between current transformer and potential transformer
03

(b) Explain 7 segment display in short.
04

(c) Draw and explain basic block diagram of CRO.
07
Q.4 (a) Explain function generator with block diagram.
03

(b) Explain different types of measurement error.
04

(c) Explain capacitive interference, inductive interference and shielding.
07

OR

Q.4 (a) Explain power measurement in single phase.
03

(b) Explain any one method of frequency measurement in short
04

(c) How Whetstone bridge can be used to find out unknown resistance. Explain with
07
circuit diagr
Q.5 (a) Write a short
am.
note on LCD.
03

(b) What is a Lissajous pattern in oscilloscope? Explain its applications
04

(c) Write short note on vertical deflection sub-system of oscilloscope.
07


OR
Q.5 (a) Explain in short pulse generator
03
(b) Explain Hay's bridge.
04
(c) What is current transformer? Explain its working with construction diagram.
07

*************
1

---