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Previous Year Exam Questions for Industrial Automation And Control - IAC of 2017 - bput by Verified Writer

  • Industrial Automation And Control - IAC
  • 2017
  • PYQ
  • Biju Patnaik University of Technology Rourkela Odisha - BPUT
  • Electronics and Instrumentation Engineering
  • B.Tech
  • 2780 Views
  • 63 Offline Downloads
  • Uploaded 1 year ago
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Registration no: Total Number of Pages: 02 B.Tech PEEE5407 7th Semester Regular/Back Examination 2017-18 Industrial Automation and Control BRANCH: AEIE, ECE, EEE, EIE, ELECTRICAL, ETC, IEE, MECH, METTA, MME, PE Time: 3 Hours Max Marks: 70 Q.CODE: B376 Answer Question No.1 which is compulsory and any five from the rest. The figures in the right hand margin indicate marks. Q1 a) b) c) d) e) f) g) h) i) j) Q2 a) b) Q3 a) b) Q4 a) Q5 Answer the following questions : Differentiate between open loop and closed loop system, taking the example of Oven. What do you mean by non-linearity and resolution of an instrument? Draw PLC ladder diagram to realize two input EX-OR gate and write ladder program for it. What is the need of hold device in DDC? What is need of self latching in a ladder diagram? Define direct and reverse action of a controller with example. Draw the complete structure of DCS in Hierarchical manner. What is adaptive control system? State three major function of adaptive control process. Inlet pressure of a particular fluid handled is 40Psia, outlet pressure is 20Psia, and vapor pressure is 16Psia. Calculate the application ratio and predict the chances of cavitations and flashing. What is the interrupt in computer control? (2 x 10) Briefly explain all about relay and solenoid as electrical actuator in process control. How does flow rate affect the differential pressure drop across the valves? Compare sensitive’s of the three valve characteristics. (5) Draw and explain the PLC ladder diagram for traffic light control. List and explain the logical function block in the DCS system. (5) (5) The transfer function of a 3-tank system is G ( s )  6 (2 s  1) (4 s  1) (6 s  1) (5) (5) b) controller is proportional and all other elements have unity transfer function. Calculate the optimal values of PID controller parameters based on ultimate cycle method of tuning? State the comparison between pneumatic and hydraulic system. (5) a) b) Write the components of DDC and explain its working principle. Following parameters are given for a tank; area=0.1m2, height at steady state (5) (5) is 1.0m when discharge is 0.16X10-3 m3/sec and is by h . If inflow is suddenly increased to 0.2X10-3 m3/sec, find the height of the tank after 10min at steady state. Q6 a) Derive the difference equation of u (k) vs. e (k) for PID control using trapezoidal rule for integration tem. Find the change in output at the third sample for the following data: KP=4, sampling time=0.53 sec, reset rate = 6sec-1, derivative time= 7sec, e1=0, e2=1.2 and e3=2.8. (5)

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b) Q7 Q8 a) b) c) d) Explain the use of feed forward control for a heat exchanger. (5) Define feedback and feed forward control system. Lists the advantages and disadvantages of feedback and feed forward control configurations. Give one example with explanation of each configuration. (10) Write short answer on any TWO : Inter-Task Communication PLC Multivariable Control Ratio Control (5 x 2)

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