Exam Details
| Subject | electronic measurements and instrumentation | |
| Paper | ||
| Exam / Course | b.tech | |
| Department | ||
| Organization | Vardhaman College Of Engineering | |
| Position | ||
| Exam Date | May, 2018 | |
| City, State | telangana, hyderabad |
Question Paper
(AUTONOMOUS)
B. Tech VII Semester Supplementary Examinations, May 2018
(Regulations: VCE-R14)
ELECTRONIC MEASUREMENTS AND INSTRUMENTATION
(Electronics and Communication Engineering)
Date: 10 May, 2018 AN Time: 3 hours Max Marks: 75
Answer ONE question from each Unit
All Questions Carry Equal Marks
Unit I
1. Write a neat block diagram of measuring system and explain each block in detail. 7M
With the help of neat diagrams, explain the basic principle and operation of Dual Slope
type DVM.
8M
2. Briefly describe the following:
i. Construction and working of basic DC Ammeter
ii. General requirements of a shunt
iii. Aryton Shunt
8M
With neat circuit diagrams, explain the construction and operation of Series-type
ohmmeter.
7M
Unit II
3. Explain the procedure for measuring frequency using Lissajous patterns. 7M
With a neat block diagram explain the working of a CRO.
8M
4. Explain with a block diagram how a digital readout oscilloscope can measure voltage. 7M
Explain the operation of vertical amplifier used in cathode ray oscilloscope, with the help
of block diagram.
8M
Unit III
5. What are the precautions that need to be taken for minimizing errors while using
bridges?
7M
Derive the balance equation of Kelvin Double Bridge and hence obtain an expression for
unknown low resistance under measurement.
8M
6. Obtain the balance equation for Hay's bridge with relevant diagrams. 8M
Briefly explain the limitations of Wheatstone's bridge measurement of resistances.
7M
Unit IV
7. What is an electrical transducer? Explain the advantages of electrical transducer.
Differentiate between active and passive transducer with examples.
7M
Explain the construction, principle and operation of LVDT. Show characteristic curves.
How is the direction of motion determined?
8M
8. Explain principle and operation of Piezo electrical transducer with the help of necessary
diagrams.
7M
Explain the working principle of a thermocouple. Discuss Seedback effect and peltier emf.
State the advantages and disadvantages of thermocouples.
8M
Unit V
9. Briefly explain moving magnet type and moving coil type velocity transducer. 8M
Write a short note on
i. Microphone for the measurement of sound
ii. Programmable logic controller
7M
10. With the help of neat circuit diagrams, explain the measurement of pressure using
Resistive transducer and Inductive transducer.
8M
With the help of a neat block diagram, explain Digital data acquisition system. 7M
B. Tech VII Semester Supplementary Examinations, May 2018
(Regulations: VCE-R14)
ELECTRONIC MEASUREMENTS AND INSTRUMENTATION
(Electronics and Communication Engineering)
Date: 10 May, 2018 AN Time: 3 hours Max Marks: 75
Answer ONE question from each Unit
All Questions Carry Equal Marks
Unit I
1. Write a neat block diagram of measuring system and explain each block in detail. 7M
With the help of neat diagrams, explain the basic principle and operation of Dual Slope
type DVM.
8M
2. Briefly describe the following:
i. Construction and working of basic DC Ammeter
ii. General requirements of a shunt
iii. Aryton Shunt
8M
With neat circuit diagrams, explain the construction and operation of Series-type
ohmmeter.
7M
Unit II
3. Explain the procedure for measuring frequency using Lissajous patterns. 7M
With a neat block diagram explain the working of a CRO.
8M
4. Explain with a block diagram how a digital readout oscilloscope can measure voltage. 7M
Explain the operation of vertical amplifier used in cathode ray oscilloscope, with the help
of block diagram.
8M
Unit III
5. What are the precautions that need to be taken for minimizing errors while using
bridges?
7M
Derive the balance equation of Kelvin Double Bridge and hence obtain an expression for
unknown low resistance under measurement.
8M
6. Obtain the balance equation for Hay's bridge with relevant diagrams. 8M
Briefly explain the limitations of Wheatstone's bridge measurement of resistances.
7M
Unit IV
7. What is an electrical transducer? Explain the advantages of electrical transducer.
Differentiate between active and passive transducer with examples.
7M
Explain the construction, principle and operation of LVDT. Show characteristic curves.
How is the direction of motion determined?
8M
8. Explain principle and operation of Piezo electrical transducer with the help of necessary
diagrams.
7M
Explain the working principle of a thermocouple. Discuss Seedback effect and peltier emf.
State the advantages and disadvantages of thermocouples.
8M
Unit V
9. Briefly explain moving magnet type and moving coil type velocity transducer. 8M
Write a short note on
i. Microphone for the measurement of sound
ii. Programmable logic controller
7M
10. With the help of neat circuit diagrams, explain the measurement of pressure using
Resistive transducer and Inductive transducer.
8M
With the help of a neat block diagram, explain Digital data acquisition system. 7M
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