Download R07 Set No. 2

Code No: 07A31002
R07
Set No. 2
II B.Tech I Semester Examinations,December 2011
SENSORS AND SIGNAL CONDITIONING
Instrumentation And Control Engineering
Time: 3 hours
Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
?????
1. (a) The hot junction of a chromel alumel thermocouple is connected to a potentiometer terminals are at 240 C. The potentiometer whose terminals are
at240 C reads 25.76mv. What is the temperature of the thermocouple junction?
The calibration chart of the thermocouple is
TemperatureO C 20
24
28 —– 480
488
493
Voltage,mv
0.8 0.95 1.12 —– 26.25 26.72 26.04
(b) Explain the factors affecting the static accuracy of filled in thermometers.[8+8]
2. (a) Derive the equations for time response of a first order system when subjected
to unit ramp input. Draw the response curves and find the steady error
(b) Classify various transducers and give an example of each and mention their
applications.
[8+8]
3. (a) Explain the inductance comparison bridge with neat sketch.
(b) What is the limitation of Max well bridge. Explain its working.
[8+8]
4. (a) Draw a system whose gain controlled by an adjustable resistance and explain?
(b) Describe the ammeter - voltmeter method of measurement of resistance with
neat diagram.
[8+8]
5. (a) With a schematic diagram, explain the operation of Instrumentation amplifier.
(b) List the characteristics of Instrumentation amplifier.
[10+6]
6. (a) List the different types of strain gauges. Explain the construction and materials used for foil type strain gauges
(b) Discuss the advantages, disadvantages and application for foil type strain
gauges.
[8+8]
7. (a) How junction semiconductor diodes are used as temperature sensors? What
are the factors on which the output of the sensor depend?
(b) How is the current output linearized in such a transducer. Obtain an expression for current output of a simplified commercial transducer of this type to
show that it is proportional to the absolute temperature. What is a PTAT.
[8+8]
8. Explain how a capacitive transducer can be used as a microphone and show what
are the additional considerations applied while designing the same.
[16]
?????
1
Code No: 07A31002
R07
Set No. 4
II B.Tech I Semester Examinations,December 2011
SENSORS AND SIGNAL CONDITIONING
Instrumentation And Control Engineering
Time: 3 hours
Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
?????
1. (a) With a schematic diagram, explain the operation of Instrumentation amplifier.
(b) List the characteristics of Instrumentation amplifier.
[10+6]
2. (a) Derive the equations for time response of a first order system when subjected
to unit ramp input. Draw the response curves and find the steady error
(b) Classify various transducers and give an example of each and mention their
applications.
[8+8]
3. (a) How junction semiconductor diodes are used as temperature sensors? What
are the factors on which the output of the sensor depend?
(b) How is the current output linearized in such a transducer. Obtain an expression for current output of a simplified commercial transducer of this type to
show that it is proportional to the absolute temperature. What is a PTAT.
[8+8]
4. Explain how a capacitive transducer can be used as a microphone and show what
are the additional considerations applied while designing the same.
[16]
5. (a) Explain the inductance comparison bridge with neat sketch.
(b) What is the limitation of Max well bridge. Explain its working.
[8+8]
6. (a) Draw a system whose gain controlled by an adjustable resistance and explain?
(b) Describe the ammeter - voltmeter method of measurement of resistance with
neat diagram.
[8+8]
7. (a) List the different types of strain gauges. Explain the construction and materials used for foil type strain gauges
(b) Discuss the advantages, disadvantages and application for foil type strain
gauges.
[8+8]
8. (a) The hot junction of a chromel alumel thermocouple is connected to a potentiometer terminals are at 240 C. The potentiometer whose terminals are
at240 C reads 25.76mv. What is the temperature of the thermocouple junction?
The calibration chart of the thermocouple is
TemperatureO C 20
24
28 —– 480
488
493
Voltage,mv
0.8 0.95 1.12 —– 26.25 26.72 26.04
(b) Explain the factors affecting the static accuracy of filled in thermometers.[8+8]
?????
2
Code No: 07A31002
R07
Set No. 1
II B.Tech I Semester Examinations,December 2011
SENSORS AND SIGNAL CONDITIONING
Instrumentation And Control Engineering
Time: 3 hours
Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
?????
1. (a) With a schematic diagram, explain the operation of Instrumentation amplifier.
(b) List the characteristics of Instrumentation amplifier.
[10+6]
2. (a) List the different types of strain gauges. Explain the construction and materials used for foil type strain gauges
(b) Discuss the advantages, disadvantages and application for foil type strain
gauges.
[8+8]
3. (a) The hot junction of a chromel alumel thermocouple is connected to a potentiometer terminals are at 240 C. The potentiometer whose terminals are
at240 C reads 25.76mv. What is the temperature of the thermocouple junction?
The calibration chart of the thermocouple is
TemperatureO C 20
24
28 —– 480
488
493
Voltage,mv
0.8 0.95 1.12 —– 26.25 26.72 26.04
(b) Explain the factors affecting the static accuracy of filled in thermometers.[8+8]
4. (a) How junction semiconductor diodes are used as temperature sensors? What
are the factors on which the output of the sensor depend?
(b) How is the current output linearized in such a transducer. Obtain an expression for current output of a simplified commercial transducer of this type to
show that it is proportional to the absolute temperature. What is a PTAT.
[8+8]
5. (a) Draw a system whose gain controlled by an adjustable resistance and explain?
(b) Describe the ammeter - voltmeter method of measurement of resistance with
neat diagram.
[8+8]
6. (a) Derive the equations for time response of a first order system when subjected
to unit ramp input. Draw the response curves and find the steady error
(b) Classify various transducers and give an example of each and mention their
applications.
[8+8]
7. Explain how a capacitive transducer can be used as a microphone and show what
are the additional considerations applied while designing the same.
[16]
8. (a) Explain the inductance comparison bridge with neat sketch.
(b) What is the limitation of Max well bridge. Explain its working.
?????
3
[8+8]
Code No: 07A31002
R07
Set No. 3
II B.Tech I Semester Examinations,December 2011
SENSORS AND SIGNAL CONDITIONING
Instrumentation And Control Engineering
Time: 3 hours
Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
?????
1. (a) How junction semiconductor diodes are used as temperature sensors? What
are the factors on which the output of the sensor depend?
(b) How is the current output linearized in such a transducer. Obtain an expression for current output of a simplified commercial transducer of this type to
show that it is proportional to the absolute temperature. What is a PTAT.
[8+8]
2. (a) Explain the inductance comparison bridge with neat sketch.
(b) What is the limitation of Max well bridge. Explain its working.
[8+8]
3. (a) The hot junction of a chromel alumel thermocouple is connected to a potentiometer terminals are at 240 C. The potentiometer whose terminals are
at240 C reads 25.76mv. What is the temperature of the thermocouple junction?
The calibration chart of the thermocouple is
24
28 —– 480
488
493
TemperatureO C 20
Voltage,mv
0.8 0.95 1.12 —– 26.25 26.72 26.04
(b) Explain the factors affecting the static accuracy of filled in thermometers.[8+8]
4. (a) Draw a system whose gain controlled by an adjustable resistance and explain?
(b) Describe the ammeter - voltmeter method of measurement of resistance with
neat diagram.
[8+8]
5. (a) With a schematic diagram, explain the operation of Instrumentation amplifier.
(b) List the characteristics of Instrumentation amplifier.
[10+6]
6. (a) Derive the equations for time response of a first order system when subjected
to unit ramp input. Draw the response curves and find the steady error
(b) Classify various transducers and give an example of each and mention their
applications.
[8+8]
7. Explain how a capacitive transducer can be used as a microphone and show what
are the additional considerations applied while designing the same.
[16]
8. (a) List the different types of strain gauges. Explain the construction and materials used for foil type strain gauges
(b) Discuss the advantages, disadvantages and application for foil type strain
gauges.
[8+8]
?????
4