Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 4th Sem New 2141704 Measurement And Instruments Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?IV(NEW) ? EXAMINATION ? SUMMER 2019
Subject Code:2141704 Date:15/05/2019
Subject Name: Measurement & 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) Difference between inductance and capacitance. 03
(b) Define ?indicating? and ?recording? types of instruments. Give an example
for each.
04
(c) Discuss Whetstone bridge to find out unknown resistance with circuit
diagram.
07
Q.2 (a) What is a Lissajous pattern in oscilloscope? Explain its applications. 03
(b) Explain Zero-beat Frequency Meter in brief. 04
(c) With neat block diagram explain Vertical deflection subsystem of
oscilloscope.
07
OR
(c) What is full form of ?PMMC?? Discuss working of PMMC meter with
diagram.
07
Q.3 (a) What is transformer? Write down types and applications of transformers. 03
(b) Explain special purpose analog meter. 04
(c) Draw and explain Analog to Digital converter. 07
OR
Q.3 (a) Discuss about types of ?resistors?. 03
(b) A moving coil instrument gives a full scale deflection for a current of 20 mA
with a potential difference of 200 mV across it. Calculate:
i) Shunt required to use it as an ammeter to get a range of 0-200 A
ii) Multiplier required to use it as a voltmeter of a range 0 -500 V.
04
(c) Explain Digital Voltmeter. 07
Q.4 (a) Explain weighted Binary Resistive type DAC. 03
(b) With block diagram explain working of Digital Multi-meters. 04
(c) What are Universal Time-Counters? Explain with Block diagram. 07
OR
Q.4 (a) How Voltmeter- Ammeter method can be used to measure unknown
resistance? Explain in detail.
03
(b) What is inductive interference? Explain how it can be reduced. 04
(c)
Explain Schering bridge method to measure unknown capacitance.
07
Q.5 (a) Give the differences between current transformer and potential transformer. 03
(b) The arms of a four-arm wien bridge a, b, c and d supplied with sinusoidal
voltage have the
Following values.
arm ab: A resistance of 800 ? in parallel with a capacitance of 2 ?F
arm bc: 400 k? resistance
arm cd: 1 k? resistance
arm da: A resistance R2 in series with 2 ?F capacitance
04
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1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?IV(NEW) ? EXAMINATION ? SUMMER 2019
Subject Code:2141704 Date:15/05/2019
Subject Name: Measurement & 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) Difference between inductance and capacitance. 03
(b) Define ?indicating? and ?recording? types of instruments. Give an example
for each.
04
(c) Discuss Whetstone bridge to find out unknown resistance with circuit
diagram.
07
Q.2 (a) What is a Lissajous pattern in oscilloscope? Explain its applications. 03
(b) Explain Zero-beat Frequency Meter in brief. 04
(c) With neat block diagram explain Vertical deflection subsystem of
oscilloscope.
07
OR
(c) What is full form of ?PMMC?? Discuss working of PMMC meter with
diagram.
07
Q.3 (a) What is transformer? Write down types and applications of transformers. 03
(b) Explain special purpose analog meter. 04
(c) Draw and explain Analog to Digital converter. 07
OR
Q.3 (a) Discuss about types of ?resistors?. 03
(b) A moving coil instrument gives a full scale deflection for a current of 20 mA
with a potential difference of 200 mV across it. Calculate:
i) Shunt required to use it as an ammeter to get a range of 0-200 A
ii) Multiplier required to use it as a voltmeter of a range 0 -500 V.
04
(c) Explain Digital Voltmeter. 07
Q.4 (a) Explain weighted Binary Resistive type DAC. 03
(b) With block diagram explain working of Digital Multi-meters. 04
(c) What are Universal Time-Counters? Explain with Block diagram. 07
OR
Q.4 (a) How Voltmeter- Ammeter method can be used to measure unknown
resistance? Explain in detail.
03
(b) What is inductive interference? Explain how it can be reduced. 04
(c)
Explain Schering bridge method to measure unknown capacitance.
07
Q.5 (a) Give the differences between current transformer and potential transformer. 03
(b) The arms of a four-arm wien bridge a, b, c and d supplied with sinusoidal
voltage have the
Following values.
arm ab: A resistance of 800 ? in parallel with a capacitance of 2 ?F
arm bc: 400 k? resistance
arm cd: 1 k? resistance
arm da: A resistance R2 in series with 2 ?F capacitance
04
2
Determine the value of R2 and frequency at which the bridge will balance.
(c) Draw & explain block diagram of CRO. 07
OR
Q.5 (a) Define Hall effect coefficient. 03
(b) Describe how to use dynamometer to measure power quantity. 04
(c) Explain Poly-Phase measurements in detail. 07
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This post was last modified on 20 February 2020