University Of Pune Question Paper
S.E. (Electrical) (Semester – II) Examination, 2011
INSTRUMENTATION
(2003 Course)
Time : 3 Hours Max. Marks : 100
SECTION – I
1. a) What is instrumentation ? Discuss the purposes it serves in detail. 10
b) State various characteristics of process. Define and explain any two of them
in brief. 6
OR
2. a) With neat block diagram explain components of a instrumentation system. 8
b) Derive expression for step and ramp response of a first order system. Draw
waveforms of input and response for both the cases. 8
3. a) Discuss various controls normally available for use of CRO. 8
b) What are the various ways of classification of transducers ? Explain each one
in brief. 8
OR
4. a) State specific adjustments required to obtain Lissajous figures on CRO. Discuss
use of Lissajous figures. 8
b) Compare :
Passive - Active transducers
Primary - Secondary transducers. 8
5. a) Explain with help of neat connection diagram, how RTD is used for
measurement of temperature. State types of RTD elements. What is PT 100 ? 10
b) Compare various types of manometers used for measurement of pressure. 8
OR
6. a) Explain electrical methods for measurement of level of liquid in tank. List
transducers used for each method. 10
b) List various transducers for measurement of temperature. State one application
of each and also mention range of temperature for which it is used. 8
SECTION – II
7. a) Describe the methods for measurement of flow using
1) Venturimeter
2) Orifice plate. 6
b) Explain the construction of wire wound strain gauges and derive the expression
for the gauge factor. 6
c) Explain the effect of temperature on strain gauge. 4
OR
8. a) Draw and explain the construction and working principle of LVDT. State four
advantages of LVDT. 6
b) Describe the construction of foil type strain gauges and explain their advantages
over wire wound strain gauges. 6
c) A resistance wire strain gauge with a gauge factor of two is bonded to a steel
structural member subjected to a stress 100 MN/m2
. The modulus of elasticity
if steel is 200 GN/m2
. Calculate the percentage change in the value of the
gauge resistance due to the applied stress. 4
9. a) What is an X.Y recorder ? How do you distinguish it from a X-t or Y-t recorder ?
Explain with suitable circuit diagram, the working of X-Y recorder. Describe
its application. 10
b) What is the function of an actuator ? Draw and explain the construction,
working principle of a direct pneumatic actuator for converting pressure signals
into mechanical shaft motion. 6
OR
10. a) What is the function of recorder ? Describe the working of strip chart recorder.
What are the different types of tracing systems used in it ? Explain with the
help of suitable diagrams. 10
b) With block diagram, explain the function of elements of the final control
operation. 6
11. a) State and explain in brief different functions of SCADA systems. What are
their common features ? 6
b) What is PLC ? What are its types ? Explain with suitable examples. 6
c) Explain the function of remote terminal unit, CRT display and main unit. 6
OR
12. Write short notes on : (3×6 each)
a) Communication for SCADA system
b) Ladder diagram elements with examples
c) Concept of MMI and HMI.
—————––––––———
S.E. (Electrical) (Semester – II) Examination, 2011
INSTRUMENTATION
(2003 Course)
Time : 3 Hours Max. Marks : 100
SECTION – I
1. a) What is instrumentation ? Discuss the purposes it serves in detail. 10
b) State various characteristics of process. Define and explain any two of them
in brief. 6
OR
2. a) With neat block diagram explain components of a instrumentation system. 8
b) Derive expression for step and ramp response of a first order system. Draw
waveforms of input and response for both the cases. 8
3. a) Discuss various controls normally available for use of CRO. 8
b) What are the various ways of classification of transducers ? Explain each one
in brief. 8
OR
4. a) State specific adjustments required to obtain Lissajous figures on CRO. Discuss
use of Lissajous figures. 8
b) Compare :
Passive - Active transducers
Primary - Secondary transducers. 8
5. a) Explain with help of neat connection diagram, how RTD is used for
measurement of temperature. State types of RTD elements. What is PT 100 ? 10
b) Compare various types of manometers used for measurement of pressure. 8
OR
6. a) Explain electrical methods for measurement of level of liquid in tank. List
transducers used for each method. 10
b) List various transducers for measurement of temperature. State one application
of each and also mention range of temperature for which it is used. 8
SECTION – II
7. a) Describe the methods for measurement of flow using
1) Venturimeter
2) Orifice plate. 6
b) Explain the construction of wire wound strain gauges and derive the expression
for the gauge factor. 6
c) Explain the effect of temperature on strain gauge. 4
OR
8. a) Draw and explain the construction and working principle of LVDT. State four
advantages of LVDT. 6
b) Describe the construction of foil type strain gauges and explain their advantages
over wire wound strain gauges. 6
c) A resistance wire strain gauge with a gauge factor of two is bonded to a steel
structural member subjected to a stress 100 MN/m2
. The modulus of elasticity
if steel is 200 GN/m2
. Calculate the percentage change in the value of the
gauge resistance due to the applied stress. 4
9. a) What is an X.Y recorder ? How do you distinguish it from a X-t or Y-t recorder ?
Explain with suitable circuit diagram, the working of X-Y recorder. Describe
its application. 10
b) What is the function of an actuator ? Draw and explain the construction,
working principle of a direct pneumatic actuator for converting pressure signals
into mechanical shaft motion. 6
OR
10. a) What is the function of recorder ? Describe the working of strip chart recorder.
What are the different types of tracing systems used in it ? Explain with the
help of suitable diagrams. 10
b) With block diagram, explain the function of elements of the final control
operation. 6
11. a) State and explain in brief different functions of SCADA systems. What are
their common features ? 6
b) What is PLC ? What are its types ? Explain with suitable examples. 6
c) Explain the function of remote terminal unit, CRT display and main unit. 6
OR
12. Write short notes on : (3×6 each)
a) Communication for SCADA system
b) Ladder diagram elements with examples
c) Concept of MMI and HMI.
—————––––––———
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