University Of Pune Question Paper
S.E. (Instrumentation and Control) (Semester – I) Examination, 2011
SENSORS AND TRANSDUCERS – I
(2003 Course)
Time : 3 Hours Max. Marks : 100
N.B.: i) Answer Q. No. 1 or Q. No. 2, Q. No. 3 or Q. No. 4, Q. No. 5,
or Q. No. 6 from Section I and Q. No. 7 or Q. No. 8, Q. No. 9
or Q. No. 10, Q. No. 11 or Q. No. 12 from Section II.
ii) Answers to the two Sections should be written in separate
answerbooks.
iii) Neat diagrams must be drawn wherever necessary.
iv) Figure to the right indicate full marks.
v) Use of logarithmic tables, slide rule, Mollier charts, electronic
pocket calculator and steam table is allowed.
vi) Assume suitable data, if necessary.
SECTION – I
Unit – I
1. a) Draw and explain potentiometers for Linear and Angular displacement
measurement. Also mention wire materials used. 10
b) Explain the concept of loading effect on potentiometer. Also explain other
characteristics of potentiometer. 8
OR
2 a) Explain working and constructional details of types of strain gauges. 10
b) A strain gauge is bonded to a beam 0.1 m long and has cross-sectional area 4 cm2.
Young’s modulus for steel 207 GN/m2. The strain gauge has an unstrained
resistance of 240Ω and a gauge factor of 2.2. When a load is applied, the
resistance of gauge changes by 0.013Ω .Calculate the change in length of the
steel beam and the amount of force applied to the beam. 8
[3962] – 313 -2-
Unit – II
3. a) Draw and explain details of flapper-nozzle transducer for displacement
measurement. 8
b) Draw and explain Translational and Rotary Encoders. 8
OR
4. a) Draw and explain fibre-optic displacement measurement techniques. 8
b) Draw and explain working details of inductive and capacitive proximity sensors. 8
Unit – III
5. a) With neat sketch, explain the details of the following manometers :
i) U-tube manometer
ii) Differential-pressure U-tube. 8
b) With neat sketch, explain Ring-balance type manometer. 8
OR
6. a) Draw and explain in details high pressure measurement technique using
Bridgeman’s type. 8
b) Draw and explain high pressure measurement techniques using capacitance
delta cell. 8
SECTION – II
Unit – IV
7. a) With neat sketch, explain Low-pressure measurement using McLeod Gauge. 10
b) Draw and explain vacuum measurement using thermal conductivity gauges. 8
OR
8. a) Explain in details temperature measurement using :
i) Bimetallic thermometer
ii) Fluid expansion type. 10
b) Explain in details errors in filled-in system thermometers. 8
Unit – V
9. a) A platinum resistance thermometer has a resistance of 140.5Ω and 100Ω at
100 and 0° C respectively. If its resistance becomes 305.3Ω , when it is in
contact with a hot gas. Determine the temperature of the gas. The temperature
coefficient of platinum is 0.0039/°C. 8
b) Draw and explain different lead-wire compensation circuits for RTD. 8
OR
10. a) Explain seebeck effect. Compare different types of thermocouples with
metal-alloys used, range, sensitivity and accuracy. 8
b) Explain any one type of the non-contact type temperature measurement
techniques. 8
Unit – VI
11. a) What is SPL ? Explain sound-level meter. 8
b) Draw and explain capacitive microphone in details. 8
OR
12. a) Explain in details torsion-bar type torque measurement techniques. 8
b) List out different miscellaneous sensors. Explain any two in details. 8
————————
S.E. (Instrumentation and Control) (Semester – I) Examination, 2011
SENSORS AND TRANSDUCERS – I
(2003 Course)
Time : 3 Hours Max. Marks : 100
N.B.: i) Answer Q. No. 1 or Q. No. 2, Q. No. 3 or Q. No. 4, Q. No. 5,
or Q. No. 6 from Section I and Q. No. 7 or Q. No. 8, Q. No. 9
or Q. No. 10, Q. No. 11 or Q. No. 12 from Section II.
ii) Answers to the two Sections should be written in separate
answerbooks.
iii) Neat diagrams must be drawn wherever necessary.
iv) Figure to the right indicate full marks.
v) Use of logarithmic tables, slide rule, Mollier charts, electronic
pocket calculator and steam table is allowed.
vi) Assume suitable data, if necessary.
SECTION – I
Unit – I
1. a) Draw and explain potentiometers for Linear and Angular displacement
measurement. Also mention wire materials used. 10
b) Explain the concept of loading effect on potentiometer. Also explain other
characteristics of potentiometer. 8
OR
2 a) Explain working and constructional details of types of strain gauges. 10
b) A strain gauge is bonded to a beam 0.1 m long and has cross-sectional area 4 cm2.
Young’s modulus for steel 207 GN/m2. The strain gauge has an unstrained
resistance of 240Ω and a gauge factor of 2.2. When a load is applied, the
resistance of gauge changes by 0.013Ω .Calculate the change in length of the
steel beam and the amount of force applied to the beam. 8
[3962] – 313 -2-
Unit – II
3. a) Draw and explain details of flapper-nozzle transducer for displacement
measurement. 8
b) Draw and explain Translational and Rotary Encoders. 8
OR
4. a) Draw and explain fibre-optic displacement measurement techniques. 8
b) Draw and explain working details of inductive and capacitive proximity sensors. 8
Unit – III
5. a) With neat sketch, explain the details of the following manometers :
i) U-tube manometer
ii) Differential-pressure U-tube. 8
b) With neat sketch, explain Ring-balance type manometer. 8
OR
6. a) Draw and explain in details high pressure measurement technique using
Bridgeman’s type. 8
b) Draw and explain high pressure measurement techniques using capacitance
delta cell. 8
SECTION – II
Unit – IV
7. a) With neat sketch, explain Low-pressure measurement using McLeod Gauge. 10
b) Draw and explain vacuum measurement using thermal conductivity gauges. 8
OR
8. a) Explain in details temperature measurement using :
i) Bimetallic thermometer
ii) Fluid expansion type. 10
b) Explain in details errors in filled-in system thermometers. 8
Unit – V
9. a) A platinum resistance thermometer has a resistance of 140.5Ω and 100Ω at
100 and 0° C respectively. If its resistance becomes 305.3Ω , when it is in
contact with a hot gas. Determine the temperature of the gas. The temperature
coefficient of platinum is 0.0039/°C. 8
b) Draw and explain different lead-wire compensation circuits for RTD. 8
OR
10. a) Explain seebeck effect. Compare different types of thermocouples with
metal-alloys used, range, sensitivity and accuracy. 8
b) Explain any one type of the non-contact type temperature measurement
techniques. 8
Unit – VI
11. a) What is SPL ? Explain sound-level meter. 8
b) Draw and explain capacitive microphone in details. 8
OR
12. a) Explain in details torsion-bar type torque measurement techniques. 8
b) List out different miscellaneous sensors. Explain any two in details. 8
————————
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