Download AKTU B-Tech 4th Sem 2016-17 Electrical Instrumentation And Process Control Question Paper

Download AKTU (Dr. A.P.J. Abdul Kalam Technical University (AKTU), formerly Uttar Pradesh Technical University (UPTU) B-Tech 4th Semester (Fourth Semester) 2016-17 Electrical Instrumentation And Process Control Question Paper

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B.TECH.
THEORY EXAMINATION (SEM?IV) 2016-17
ELECTRICAL INSTRUMENTATION AND PROCESS CONTROL
T ime : 3 Hours Max. Marks : 100
Note .' Be precise in your answer. In case ofnumericalproblem assume data wherever not provided.
SECTION ? A
1. Explain the following: 10 x 2 = 20
(a) Differentiate between primary and secondary transducers.
(b) Mention the use of capacitive transducer.
(c) Differentiate between primary and secondary transducers.
(d) Why platinum is preferred over gold to construct RTD?
(e) Define working principle of Hall Effect transducer
(1) Categorize resistive transducers 0n the basis of applications.
(g) Define the piezoelectric effect.
(h) What is the need of data transmission and telemetry?
(i) Describe the working principle of LCD.
(j) Discuss the advantages of digital oscilloscope over analog oscilloscope.
SECTION ? B
2 Attempt any ?ve of the following questions: 5 x 10 = 50
3) Explain the measurement of low pressure using diaphragm with the help of a diagram.
b) A strain gauge is bonded to a beam 0.1m long and has a cross sectional area 4cm2.
Young?s modulus for steel is 207 GN/mz. The strain gauge has an unstrained resistance
of 240 Q and a gauge factor of 2.2. When a load is applied, the resistance of gauge
changes by 00130. Calculate the changes in length of the steel beam and the amount
of force applied to the beam.
c) Explain why it is essential to use radio frequency telemetry? Compare the salient
features of PAM and PCM telemetry techniques.
d) Describe the basic components of magnetic tape recorder and application using direct
techniques.
e) Discuss the advantages of SMART sensor over a sensor on the basis of construction
and applications.
1) A proportional controller is used to control temperature within 500 C to 130?C. A set
point is 735?C. The set point is maintained with 50 as output of controller. Find the
proportional offset which requires 55 % of controller output when proportional gain is:
i) 0.1 ii) 10.0.
g) What are the advantages of Digital data acquisition system over Analog data
acquisition system? Explain in brief the building blocks of Modern digital data
acquisition system.
h) Write short note with examples on:
(i) Optoelectronic sensors.
(ii) Self Regulation in a process.
SECTION ? C
Attempt any two parts of the following questions: 2 x 15 = 30
3. Explain the operating principle of an LVDT with a neat sketch. Draw its characteristics. Write
down two applications. An LVDT with a secondary voltage of 5V has a range of +_ 25 mm. (a)

Find the output voltage when the core is -18.75mm from the centre. (b) Plot the output voltage
versus core position for a core movement going from +18.75mm to - 10 mm.
Describe the three control action terms. What are the changes in the overall system dynamics
when a derivative action is plugged in? Give the tunable parameters of a PID controller?
What is spectrum analyzer? Discuss which is better an Analog tape recording or Digital tape
recording. Compare various digital techniques employed in digital tape recording with the help
of waveforms.