VALLIAMMAI ENGINEERING COLLEGE DEPARTMENT OF ELECTRONICS AND INSTRUMENTATION ENGINEERING QUESTION BANK

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1 VALLIAMMAI ENGINEERING COLLEGE SRM Nagar, Kattankulathur DEPARTMENT OF ELECTRONICS AND INSTRUMENTATION ENGINEERING QUESTION BANK VII SEMESTER EI6702 Logic and Distributed Control System Regulation 2013 Academic Year Prepared by Ms. V. Mangaiyarkarasi, Assistant Professor (Senior Grade) - EIE Ms. K. Rathna Priya, Assistant Professor (Ordinary Grade) EIE

2 VALLIAMMAI ENGINEERING COLLEGE SRM Nagar, Kattankulathur DEPARTMENT OF ELECTRONICS AND INSTRUMENTATION ENGINEERING QUESTION BANK SUBJECT : EI6702 Logic and Distributed Control System SEM / YEAR : VII Semester / IV Year EIE UNIT I PROGRAMMABLE LOGIC CONTROLLER Evolution of PLCs Components of PLC Architecture of PLC Discrete and analog I/O modules Programming languages -Ladder diagram Function block diagram (FBD) - Programming timers and counters PART - A Q.No Questions BT Level Competence 1. Define PLC. BTL 1 Remember 2. Name the Programming devices available to program the PLC BTL 1 Remember 3. Name the different modules involved in PLC architecture. BTL 1 Remember 4. List some of the input and output devices of PLC with their symbols. BTL 1 Remember 5. Write few important rules for constructing PLC program. BTL 1 Remember 6. Define program scan. BTL 1 Remember 7. Discuss the features of PLC. BTL 2 Understand 8. Describe Counters. BTL 2 Understand 9. Summarize the instruction used for ON delay timer operation in PLC. BTL 2 Understand 10. Differentiate timers and counter. BTL 2 Understand 11. Show how ladder diagram is used in PLC. BTL 3 Apply 12. Classify the methods available to program PLC. BTL 3 Apply 13. Illustrate the importance of counters in PLC. BTL 3 Apply 14. Compare T ON and T OFF timers. BTL 4 Analyze 15. You have a machine that cycles on and off during its operation. You BTL 4 Analyze need to keep a record of its run time for maintenance purposes. Which timer would accomplish this? 16. Point out the use of timers in PLC. BTL 4 Analyze 17. How do you recommend PLC for a particular process? BTL 5 Evaluate 18. Summarize the conditions to develop ladder logic. BTL 5 Evaluate 19. Design a ladder logic diagram for single input timer. BTL 6 Create 20. Develop a simple program using relay ladder logic to implement traffic light control system. PART B BTL 6 Create 1. (i) Describe the functioning of analog and digital modules of (9) BTL1 Remember

3 PLC. (ii) Differentiate PLC and Conventional relay based logic (4) BTL1 Remember system. 2. (i) List down the steps to be considered for designing a 16 (5) BTL1 Remember analog input and 5 digital input, 5 analog output and 2 digital output PLC. (ii) What is the purpose of input status table and output status (8) BTL1 Remember in PLC and write any PLC program using counter instruction. 3. (i) Describe with neat block diagram power supply used for (4) BTL1 Remember PLC. (ii) Explain the architecture of PLC with neat diagram. (9) BTL1 Remember 4. (i) Discuss the terms a) Horizontal tracing b) Program cycle (5) BTL2 Understand (ii) With a neat block diagram explain the functions of Central (8) BTL2 Understand Processing Unit of PLC 5. (i) Summarize the steps in planning a program for larger (7) BTL2 Understand process using ladder diagram construction. (ii) Discuss the I/O modules involved in PLC. (6) BTL2 Understand 6. (i) Illustrate how to convert the fundamental relay schematic (7) BTL3 Apply diagrams in to PLC ladder logic diagram with an example. (ii) Write an PLC program for one way traffic control. (6) BTL3 Apply 7. (i) IIustrate the advantages of PLC over relay logic. (4) BTL3 Apply (ii) With logic ladder program and a timing chart explain (9) BTL3 Apply Retentive On-Delay Timer. 8. (i) Demonstrate how timers and counters are programmed in (7) BTL4 Analyze PLC? Illustrate with an example. (ii) Write about advanced PLC functions and alternative (6) BTL4 Analyze programming languages. 9. (i) Draw a ladder diagram to justify a three-motor system (7) BTL5 Evaluate having the following conditions: Motor 1 (M1) starts as soon as the start switch is on; after 10 seconds, M1 goes off and motor 2 (M2) starts. After 5 seconds, M2 goes off and M3 starts. After 10 seconds, M3 goes off. M1 starts and the cycle is repeated. (ii) Develop ladder diagram for controlling the level of liquid in a tank between upper and lower limits. (6) BTL5 Evaluate

4 10. (i) Design a PLC program to operate a light according to the (7) BTL6 Create following sequence. a. A momentary push button is pressed to start the sequence. b. The light is switched on and remains ON for 2 sec. c. The light is switched off and remains OFF for 2 sec. d. A counter is incremented after this sequence. e. The sequence then repeats for a total of 4 counts. f. After the fourth count the sequence will stop and counter is reset. (ii) Design a PLC program and prepare a typical I/O connection diagram and ladder logic program for the following counter specifications. (1) Counts the number of times a push button is closed. (2) Decrement the accumulated value of the counter each time a second push button is closed. (3) Turns ON a light anytime the accumulated value of the counter is less than 20. (6) BTL6 Create 11. (i) Draw the ladder diagram for the following function table. (7) Inputs I I, 1 2 Outputs Q I, Q 2, Q 3, Q 4 BLT4 Analyze I I I 2 Q 1 Q 2 Q 3 Q I I I I 0 I I I I I I I I (ii) Explain how PLC is helpful in automated process. (6) BLT4 Analyze 12. (i) Describe the brief history of PLC along with its (7) BLT1 Remember manufacturer. (ii) State the difference between ladder diagram and functional (6) BLT1 Remember block diagram. 13. Explain the important points that have to be considered in the (13) BTL4 Analyze selection of PLC. 14. Discuss the symbols used in both ladder diagram and function block diagram and explain the function of each symbol. (13) BTL2 Understand

5 PART-C 1. (i) Develop the ladder logic that will turn ON an output light (6) BTL6 Create after a switch has been closed 10 times. Push Button(PB) will reset the counter (ii) Explain the internal blocks of typical analog input and (9) BTL6 Create output modules of PLC. 2. (i) Develop ladder diagram for the following oven control applications (8) BTL6 Create Turn ON the heating element and cooling fan simultaneously for heating. Turn OFF the heating element when oven is turned OFF and OFF DELAY timer for 10secs starts counting down and then the cooling fan is tuned OFF. (ii) Develop a PLC prpgram to count the number of trucks (7) BTL6 Create entering and leaving a parking garage and turn ON the pilot light once the garage is full. 3. Develop a ladder logic program to implement a clock to (15) BTL6 Create display the tune in 24 hour military format. 4. How solid state sate devices are designed to perform logic (15) BTL5 Evaluate function previously accomplished by electromechanical relays? Justify he answer in detail. UNIT II APPLICATIONS OF PLC Instructions in PLC Program control instructions, math instructions, data manipulation Instructions, sequencer and shift register instructions Case studies in PLC PART A Q.No Questions BT Level Competence 1. Define Program control instruction with an example. BTL 1 Remember 2. Write a simple program using PLC to implement the EXOR and BTL 1 Remember NAND logic gate. 3. Write the format of addition and subtraction in function block BTL 1 Remember programming. 4. List some of the sequence instructions used in PLC. BTL 1 Remember 5. Describe briefly the functional areas in which the programmable BTL 1 Remember controllers are used. 6. Define rung and mention some of the programming methods. BTL 1 Remember

6 7. Draw a ladder diagram that will cause the output pilot light PL 2 to be BTL 2 Understand turned ON when the selector switch SS 2 is closed, push button PB 4 is closed and limit switch LS 3 is OPEN. 8. Describe the relay logic. BTL 2 Understand 9. Summarize the sequence of operations carried out in PLC BTL 2 Understand programming. 10. Differentiate between relay based PLC and computer based PLC. BTL 2 Understand 11. Show how I/O scan is performed in PLC. BTL 3 Apply 12. Examine the data manipulation instructions of PLC with simple BTL 3 Apply example. 13. Illustrate the importance of fail-safe circuits in PLC. BTL 3 Apply 14. Compare the difference between event driven and time driven BTL 4 Analyze sequencer. 15. Analyze the advantages of sequencer programming over conventional BTL 4 Analyze programming. 16. Point out how jump operation is performed in PLC. BTL 4 Analyze 17. Retentive instructions should not be placed within an MCR zone. BTL 5 Evaluate Justify? 18. Summarize the instructions that would be programmed outside the BTL 5 Evaluate jumped area of a program. 19. Perform a PLC ladder diagram to indicate light is to go ON when a BTL 6 Create count reaches 23 and go OFF when a count reaches Design a program to convert Celsius to Fahrenheit conversion. BTL 6 Create PART - B 1. (i) Describe any typical control application using math (4) BTL1 Remember instructions of PLC. (ii) Write a program that will cause a light to turn ON if a PLC (9) BTL1 Remember counter value is less than 10 or more than (i) List the inputs and outputs used in a bottle filling (9) BTL1 Remember application and write a program using ladder diagrams. Use minimum 6 I/O, 2 timers, 1 counter. (ii) Can a PC be used as PLC? How? (4) BTL1 Remember 3. (i) List out the applications of PLC in process sector mention (8) BTL1 Remember its inputs and outputs. (ii) Explain the basic jump functions used in PLC with example. (5) BTL1 Remember

7 4. (i) Discuss the automatic bottle filling system with hardware and ladder diagram. (ii) With an example, explain function block programming for sequence control application. 5. (i) Summarize the various types of programming terminals and devices used in programmable controller systems. (ii) Write a detailed technical note on requirement of communication networks of PLC. 6. (i) Classify the types of instructions in PLC and mention its uses. (ii) Write a PLC ladder diagram for a process plant. Assume total of 5 inputs and 6 outputs. Mention the I/O s. 7. (i) Demonstrate a non-retentive timer program that will turn on a pilot light after a time delay period. Use a thumbwheel switch to vary the preset time-delay value of the timer. (ii) Write a PLC program for the following conditions: The oven is to maintain an average set point temperature of 600 o F with a variation of about 1% between the off and on cycles. 8. (i) Explain how hardware-to-program interface and programto-hardware interface are established in PLC. (ii) Propose and explain a safeguard technique for diagnosing failure in the I/O unit of a PLC. 9. (i) State the function of each of the following in the basic safety wiring for a PLC installation: a) Main disconnect switch b) Isolation transformer c) Emergency stops. d) Master control relay (ii) Why should emergency stop circuits be hardwired instead of programmed? 10. (i) A main conveyor has two conveyors, A and B, feeding it. Feeder conveyor A puts six-packs of canned soda on the main conveyor. Feeder conveyor B puts eight-packs of canned soda on the main conveyor. Both the feeder (7) BTL2 Understand (6) BTL2 Understand (7) BTL2 Understand (6) BTL2 Understand (4) BTL3 Apply (9) BTL3 Apply (7) BTL3 Apply (6) BTL3 Apply (7) BTL4 Analyze (6) BTL4 Analyze (8) BTL5 Evaluate (5) BTL5 Evaluate (7) BTL6 Create

8 conveyor has counters that count the number of packs leaving them. Create a PLC program to give a total can count on the main conveyor. (ii) Compose the safety considerations that must followed as (6) BTL6 Create part of PLC program. 11. Compare the standard and safety PLC with regard to (13) BTL4 Analyze a) Processors. b) Input circuitry. c) Output circuitry. d) Power supplies 12. (i) Explain what, the jump to subroutine instruction allows the (7) BTL5 Evaluate program to do? (ii) In what type of machine operation can this instruction save (6) BTL5 Evaluate a great deal of duplicate programming? 13. Describe the function of the fault routine file and the selectable (13) BTL2 Understand timed interrupt function. 14. When programming stop buttons, why it is safer to use an NC (13) BTL4 Analyze pushbutton programmed to examine for an on condition than an NO pushbutton programmed to examine for an off condition? PART C 1. (i) Develop a ladder logic program using sequencer (8) BTL6 Create instruction for implementing an automation of washing process. (ii) Explain the operation of time driven sequencer with an (7) BTL6 Create example. 2. (i) Write a ladder logic program to implement the following process. Consider a single tank system with discharge pump at its outlet. The sequence of operation is as follows: (10) BTL 5 Evaluate A heater coil is immersed in the tank containing liquid to increase its temperature. Once the desired temperature is reached, the temperature sensor switch must be closed before staring the pump. Start button is pushed, to turn ON the pump. Another button is pushed 8 sec after the pump

9 starts. Now the pump should stop for 20sec after which it can be stared again. An emergency stop button can be used to turn OFF the pump. (ii) Design a PLC program to indicate a vesset over fill condition by energizing an alarm when a supply leaks 10 lb or more of raw material into the vessel after a preset rate of 1000 lb has been reached. Also indicate by a pilot light when the raw material exceeds its preset weight. 3. (i) Develop the ladder logic diagram for the following application (5) BTL6 Create (10) BTL6 Create (ii) Open V 1 and V 3 till L Up is reached. Turn ON stirrer and heater for 15sec. Turn OFF stirrer and heater. Open V 2 until L Low is reached and repeat the sequence. Identify the formats of the different data comparison instructions. 4. Write a PLC program to implement the process illustrated below. The sequence of operation is to be as follows: i. Normally open and normally closed push buttons are used to start and stop the process. ii. When the start button is pressed, solenoid A energizes to start filling the tank. iii. As the tank fills, the empty level sensor switch closes. iv. When the tank is full, the full level sensor switch closes. v. Solenoid A is de-energized. vi. The agitator motor starts automatically and runs for 3 min to mix the liquid. vii. When the agitator motor stops, solenoid B is energized to empty the tank. viii. When the tank is completely empty, the empty sensor (5) BTL2 Understand BTL6 Create

10 switch opens to de-energize solenoid B. ix. The start button is pressed to repeat the sequence. (15)

11 UNIT III COMPUTER CONTROLLED SYSTEMS Basic building blocks of computer controlled systems Data acquisition system Supervisory control Direct digital control- SCADA:- Hardware and software, Remote terminal units, Master Station and Communication architectures PART A Q.No. Questions BT Level Competence 1. Define supervisory control. BTL 1 Remember 2. Write about Tag and mention its uses. BTL 1 Remember 3. What is SCADA? Give any four editors available in SCADA BTL 1 Remember package. 4. List the limitations of DDC. BTL 1 Remember 5. Describe briefly the function of DDC BTL 1 Remember 6. Identify the hardware elements of SCADA. BTL 1 Remember 7. Discuss the two algorithms used in DDC software. BTL 2 Understand 8. Describe briefly about Remote Terminal Unit. BTL 2 Understand 9. Give the communication architecture for SCADA. BTL 2 Understand 10. Describe the functional units in computer control of processes. BTL 2 Understand 11. Show how to acquire the image using SCADA systems? BTL 3 Apply 12. Illustrate the need for watch dog timer in a process control BTL 3 Apply computer? 13. Examine data loggers. BTL 3 Apply 14. Differentiate DDC and SCADA. BTL 4 Analyze 15. What is CIMPLICITY? BTL 4 Analyze 16. Compare PLC and SCADA. BTL 4 Analyze 17. Why is the digital control necessary in industries? BTL 5 Evaluate 18. Why is it very difficult to use a computer for process control BTL 5 Evaluate without a real time clock? 19. Select a process plant of your choice and criticize the use of BTL 6 Create computer controls over conventional controls. 20. What will happen if communication buses used in process industries BTL 6 Create are not standardized? PART B 1. Describe the components and architecture of SCADA with neat diagram. (13) BLT1 Remember 2. (i) Describe about direct digital control systems with (9) BLT1 Remember

12 examples. (ii) Explain the protocols used in the computer controlled (4) BLT1 Remember systems and mention its standards. 3. (i) List the basic blocks involved in computer controlled (8) BLT1 Remember system and explain the same with flow chart of a temperature control process. (ii) Explain the function of RTU in SCADA system. (5) BLT1 Remember 4. Distinguish between SCADA and DDC. Explain the (13) BLT2 Understand hardware architecture of supervisory control. 5. (i) List the functional requirements of a distributed process (7) BLT2 Understand control system. (ii) Enumerate the advantages of digital computer control of (6) BLT2 Understand processes. 6. (i) Classify the types of communication buses used in (7) BLT3 Apply process industries. (ii) Illustrate any one way that the scan rate for a single RTU (6) BLT3 Apply could be increased beyond the scan rate for the other RTUs. 7. Explain in detail about Data Acquisition system for any one (13) BLT4 Analyze plant of your choice. 8. Explain SCADA system used in Power Plant with a neat (13) BLT4 Analyze diagram. 9. Explain the DDC structure with neat diagram and compare (13) BLT5 Evaluate the advantages of DDC over conventional analog systems. 10. Design a computer based control system which shows both (13) BLT6 Create hardware and software requirements for a CSTR process. 11. Write short notes on SCADA system used in (13) BTL1 Remember a) Petroleum Refining Process b) Water Purification system. 12. Show how the following units are interfaced in SCADA (13) BTL3 Apply system and explain the functions of each unit a) Human Machine interface unit b) Master Terminal unit c) Remote terminal unit. 13. (i) Analyze how does the Control and Monitoring system communicate with the plant floor? (7) BTL4 Analyze

13 (ii) Explain the fastest method of communicating with the plant floor? 14. (i) Explain how can we provide backup for critical tasks such as plant-floor I/O, alarms and trends? (ii) Discuss what will happen to alarms monitoring if the primary alarms server fails? (8) PART C 1. (i) Evaluate the functions performed by the software components of SCADA. (6) BTL4 Analyze (7) BTL4 Analyze (6) BTL4 Analyze (10) BLT5 Evaluate (ii) Merits and demerits of DDC with SCADA. Justify? (5) BLT5 Evaluate 2. Explicit the supervisory computer control and direct digital control architectures before the evolution of DCS. 3. Critique layered network interface with the configuration of each functional block with neat diagram. 4. Asses the different controller operation performed in computer control system. (15) BLT5 Evaluate (15) BLT5 Evaluate (15) BLT5 Evaluate UNIT IV DISTRIBUTED CONTROL SYSTEM DCS Various Architectures Comparison Local control unit Process interfacing issues Communication facilities PART - A Q.No Questions BT Level Competence 1. Define distributed control system with example. BTL 1 Remember 2. What are the architectural parameters for evaluating the controllers? BTL 1 Remember 3. Name few popular communication buses used in DCS. BTL 1 Remember 4. What are the different functions performed by DCS? BTL 1 Remember 5. What is the display hierarchy used in the DCS system. BTL 1 Remember 6. List different types of operator display. BTL 1 Remember 7. Describe the need can be satisfied in designing an industrial grade BTL 2 Understand LCU. 8. Interpret the important function performed by LCU. BTL 2 Understand 9. Give some application of DCS. BTL 2 Understand 10. Give some communication protocol used in distributed control BTL 2 Understand system. 11. Examine the approaches in designing a redundant LCU architecture. BTL 3 Apply

14 12. Compare the configuration of the controller. BTL 3 Apply 13. Show the function of engineering interface. BTL 3 Apply 14. Classify the factors to be considered for types of communication in BTL 4 Analyze DCS. 15. Differentiate PLC and DCS. BTL 4 Analyze 16. Analyze the major architectural parameters to be considered for BTL 4 Analyze designing a controller for various industrial control applications. 17. Evaluate the features of shared communication facility used in DCS BTL 5 Evaluate 18. Compare individual, centralized and distributive control systems. BTL 5 Evaluate 19. Generalize some of the bus standard used in process industries. BTL 6 Create 20. What is the role of communication interfaces in DCS? BTL 6 Create PART - B 1. Describe the hierarchy of DCS with neat diagram. (13) BTL 1 Remember 2. (i) List the components used in distributed control system. (8) BTL 1 Remember (ii) List the requirements of LCU. (5) BTL 1 Remember 3. Explain the architecture of distributed control system and its (13) BTL 4 Analyze main sub-system. Compare it with SCADA system. 4. (i) Compare DCS and DDC. (7) BTL 5 Evaluate (ii) Describe the importance of local control unit in DCS. (6) BTL 1 Remember 5. (i) Generalize the process interfacing issues related to DCS (7) BTL 6 Create or Petroleum industry. (ii) How to select topology and communication protocol of (6) BTL 6 Create process control application? 6. Discuss briefly interaction between LCU architecture and the (13) BTL 2 Understand communication devices in the Distributed control systems. 7. Examine the several functions to be accomplished by the (13) BTL 3 Apply communication interfaces in DCS? Also explain LCU interfaces to distributed systems with diagram. 8. (i) Summarize the Importance of DCS and software used in (7) BTL 5 Evaluate DCS. (ii) Explain the LAN topology of DCS in detail. (6) BTL 4 Analyze 9. Communication plays a critical role in DCS is it true? Justify with neat sketch. (13) BTL 5 Evaluate

15 10. (i) Examine any one popular communication protocol used (7) BTL 1 Remember in field level. (ii) Express the important communication facilities used in (6) BTL 2 Understand Process industry. 11. Compare the Architecture of DCS with Architectural (13) BTL 5 Evaluate parameters. 12. (i) Compare the DCS with previous architecture. (7) BTL 5 Evaluate (ii) Summarize the typical input output requirements of (6) BTL 2 Understand DCS. (8) 13. Summarize the on-line LCU diagnosis. (13) BTL 2 Understand 14. Explain the security design issues for the LCU. (13) BTL 4 Analyze PART C 1. Why is HART called a Hybrid protocol? Elucidate in detail (15) BTL 5 Evaluate the communication layer of HART protocol. 2. Analyze the step by step process of Distributed Control System with a neat sketch and list out the functions performed by the various blocks. (15) BTL 4 Analyze 3. (i) Compare and contrast any two architectures of LCU. (8) BTL 4 Analyze (ii) Explain any one communication system portioning used in DCS. (7) BTL 4 Analyze 4. Investigate the process input output design issues for monitoring and control of a large industrial process. (15) BTL 5 Evaluate UNIT V INTERFACES IN DCS Operator interfaces - Low level and high level operator interfaces Displays - Engineering interfaces Low level and high level engineering interfaces Factors to be considered in selecting DCS Case studies in DCS PART - A Q.No Questions BT Level Competence 1. Identify the main and sub process involved in iron and steel process. BTL 1 Remember 2. List the function of engineering interface hardware. BTL 1 Remember 3. Write the important features incorporated in high level engineering BTL 1 Remember interface. 4. What is plant level in display hierarchy? BTL 1 Remember 5. Sketch the display hierarchy of an industrial DCS. BTL 1 Remember

16 6. What are the hardware elements in the operator interface? BTL 1 Remember 7. Interpret the areas to be concentrated by the operator interface. BTL 2 Understand 8. Give the significance of computers in modern control systems. BTL 2 Understand 9. Express the features provided in operator interfaces. BTL 2 Understand 10. Indicate the function of HLOI. BTL 2 Understand 11. Examine the design considerations in display. BTL 3 Apply 12. Classify the different types of architectural models in HLOI. BTL 3 Apply 13. Mention the prominent features of graphic display. BTL 3 Apply 14. How engineering workstation is different from operator work BTL 4 Analyze station in DCS? 15. Compare the features of high level engineering and operator BTL 4 Analyze interface. 16. Point out the advantages and disadvantages of centralised HLOI BTL 4 Analyze configuration. 17. What flexibility does the control and monitoring systems provide BTL 5 Evaluate for defining trend data? 18. Compare interoperability and interchangeability. BTL 5 Evaluate 19. Suggest a suitable area control method used in DCS. BTL 6 Create 20. Prepare the engineering interface requirements. BTL 6 Create PART - B 1. Explain the functional requirements of operator interfaces in (13) BTL 4 Analyze monitoring process control and process record keeping. 2. (i) List the features present in high level operator interfaces. (7) BTL 1 Remember (ii) Compare the advantage and disadvantages of low and (6) BTL 5 Evaluate high level operator interfaces. 3. Discuss the low and high level operator interfaces in DCS. (13) BTL 2 Understand 4. Examine the structure of typical display hierarchy of (13) BTL 3 Apply industrial control systems with suitable diagram. 5. Describe different types of alarms and alarm management in (13) BTL 1 Remember DCS. 6. (i) Explain the importance of operator display used in any of (7) BTL 4 Analyze the process industry. (ii) Analyze the future trends in DCS. (6) BTL 4 Analyze 7. What is the difference between redundancy and Fault tolerance? Explain the redundancy concept available in (13) BTL 4 Analyze

17 controller level with suitable diagram. 8. List the various engineering interfaces used in DCS, with (13) BTL 1 Remember neat diagram. Differentiate low and high level engineering interfaces. 9. (i) Explain the role of general purpose computers in DCS. (9) BTL 4 Analyze (ii) Draw the flow chart for distribution of high level (4) BTL 5 Evaluate functions. 10. Describe how DCS can be used for controlling Iron and steel (13) BTL 6 Create plant or Chemical Plants or Cement Plants. 11. Explain the block diagram of industrial DCS in detail. (13) BTL 4 Analyze 12. Apply the general architecture of DCS to any one industrial (13) BTL 3 Apply DCS and compare the major blocks in detail. 13. (i) Consider any chemical plant and explain the role of DCS (10) BTL 6 Create in controlling the plant in order to obtain the desired quality and quantity of the end product. (ii) List the factors to be considered in selecting a DCS for a (3) BTL 6 Create process. 14. Describe the functions and features incorporated in the (13) BTL 1 Remember engineering interface at low and high level applications with an suitable example. PART C 1. Compose the control, analysis and optimization in thermal (15) BTL 6 Create power plant interfaced with DCS. 2. Explicit the importance and functions of operator and (15) BTL 5 Evaluate engineering interfaces a field and control room level. 3. Develop a industrial case study of your choice and explain (15) BTL 6 Create the role of DCS. 4. Create the automation strategy of water treatment plant used in DCS. (15) BTL 6 Create