JNTU Kakinada B-Tech 4-1 INSTRUMENTATION AND CONTROL SYSTEMS R13 March 2018 Question Paper

IV B.Tech I Semester Supplementary Examinations, February/March – 2018
INSTRUMENTATION AND CONTROL SYSTEMS (Mechanical Engineering)Time: 3 hours Max. Marks: 70
Question paper consists of Part-A and Part-B
Answer ALL sub questions from Part-A
Answer any THREE questions from Part-B
*****

PART ?A(22 Marks)1. a) Name the different sources of error. [3]
b) List five properties a material should have to be used as an element for bimetallic
strip.
[4]
c) State the basic principle on which strain gauge accelerometer works. [4]
d) Discuss about Wheat stone bridge circuit. [4]
e) What are hygroscopic materials? Give examples. [4]
f) Write the applications of control systems. [3]

PART ?B(3×16 = 48 Marks)2. a) Draw the block diagram of generalized measurement system and explain its
various elements.
[8]
b) With the help of a neat sketch explain the working of piezo electric transducer
and write its advantages and limitations.
[8]

3. a) What is a thermistor? With a neat sketch explain how it is used to measure
temperature? Write its advantages, limitations and applications.
[8]
b) Explain the working of elastic diaphragm pressure gauge used for the
measurement of pressure and write its limitations.
[8]

4. a) Explain the construction and working of orifice meter and flow nozzle. [8]
b) Explain the construction and working of cryogenic fuel level indicator. [8]

5. a) Explain the method of strain measurement by temperature compensation using an
adjacent arm compensating gauge.
[8]
b) Explain the process of measuring torque by strain gauges on rotating shaft. [8]

6. a) Explain the working of electrical humidity sensing absorption hygrometer and
write its applications and limitations.
[8]
b) Discuss the working of proving ring elastic force meter. [8]

7. a) Explain the effects of feedback on overall gain, sensitivity and distortion. [8]
b) With the help of a block diagram explain about pressure and temperature control
system.
[8]

Code No: PT41031
Set No. 1
R13
1 of 1