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# 2014 Acharya Nagarjuna University Bapatla Engineering College - Process Control - III/IV B.Tech - 2nd Semester - April 2014 Question paper

 Course: University/board: Acharya Nagarjuna University

Do you need the previous question papers of Process Control - Bapatla Engineering College - B.Tech? This is the original question paper from the B.Tech third year second semester exam conducted by Bapatla Engineering College in April 2014. Feel free to make a copy and use it to prepare for your upcoming exams.

III/IV B.Tech Degree Examinations, April 2014

Second Semester

Process Control

Time : 3 hours

Maximum Marks : 60

Answer ONE question from each Unit

1. Answer the following [12 x 1 = 12M]
a) Define "Degree of freedom".
b) Mention the closed loop tuning methods.
c) What is the drawback of derivative controller?
d) What is a batch process?
e) What is a Cavitation?
f) Give the mathematical model of a thermal system.
g) Mention the different types of control valves.
h) What do you mean by tuning of controller?
i) What is a voice coil motor?
j) What is a relay type actuator?
k) Mention the merits of self operated controller.
l) What is the significance of pulse testing?

UNIT - I [1 x 12 = 12M]

2. a) Explain the following terms with example
i) Manipulated Variables.
iii) Process Output Variables.
2. b) Differentiate between the following
i) Interacting and non Interacting Process.
ii) Self and non Self regulating process. (OR)
3. Describe the following:
a) Two position control.
b) P+D control.

UNIT - II [1 x 12 = 12M]

4. a) Compare Pneumatic and Electronic based controller.
4. b) With neat diagram explain working principle of Pneumatic Transmitter. (OR)
5. a) Write short notes on Hydraulic type actuators
5. b) Write short notes on Control valve selection.

UNIT - III [1 x 12 = 12M]

6. a) What is the need for Ratio control in process control applications?
6. b) Compare feedback and feed forward plus feedback controller design. (OR)
7. a) Explain Dead time compensation.
7. b) With a neat block diagram, explain the design of cascade controller.

UNIT - IV [1 x 12 = 12M]

8. a) What do you mean by process identification? Give a brief notes on Frequency testing.
8. b) How can controller tuning be made effective for system stability? (OR)
9. a) Explain Zeigler-Nichols closed loop tuning method.
9. b) Find out Z-N PID setting if Ku = 4 and Pu = 20 second, where Ku and Pu are ultimate gain and ultimate period.

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