Download GTU B.Tech 2020 Winter 7th Sem 2171103 Industrial Automation Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER-VII (NEW) EXAMINATION - WINTER 2020

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Subject Code:2171103 Date:21/01/2021
Subject Name:Industrial Automation
Time:10:30 AM TO 12:30 PM Total Marks: 56

Instructions:

1. Attempt any FOUR questions out of EIGHT questions.

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2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

Q.1 (a) Explain any one Displacement Transducer with neat diagram 3
(b) Write short note on MML 4
(c) Explain the basic principles of a Servo. Also explain DC Servo Motors. 7

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Q.2 (a) Explain Need and advantages of Automation. 3
(b) Explain the working principle of Time-difference Type Ultrasonic Flow Meter. 4
(c) List standard interface & Compare RS232 & RS485 interface. 7

Q.3 (a) Explain the concept of serial and parallel transmission techniques used for communication between two intelligent devices. 3
(b) Explain various applications of signal conditioning circuits in DAQ. 4

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(c) Explain use of Solenoid as an Electrical Actuator. How it is used to change gears? 7

Q.4 (a) List the system characteristics that need to be analyzed for selection of PLC. 3
(b) Explain four major configurations of Industrial Robots. 4
(c) Discuss in brief about the various types of information display that can be achieved using DCS for efficient monitoring of plant parameters. 7

Q.5 (a) Explain features and advantages of DCS systems. 3

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(b) Explain in detail the input-output module used in PLC. 4
(c) Explain computer based data acquisition (DAQ) system. 7

Q.6 (a) Explain RTD with neat diagrams. Write down the equation for the relationship between Temperature and Resistance of conductor. 3
(b) Compare relative features of twisted pairs, coaxial cables and fiber optic cable. 4
(c) Explain the basic principle of Mechanical Tachometers used for the speed measurement. Explain any two in detail with neat diagrams. 7

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Q.7 (a) List the PLC Programming Languages & Draw four symbols of ladder Diagram. 3
(b) What is Automation and explain different types of automation systems. 4
(c) Develop a Ladder Diagram for the Automatic Door Control System shown in Fig. 1. 7

XO(Infrared Sensor. )
/ \

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/ \
/ \
/ \
/ \
/ \

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/ \
/ \
/ \
/ \
/ \

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/ \
/ \
/e _—
o ‘\Q
- \

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X2(Opening Limit Switch )\, X1(Closing Limit Switch ) /'~ X2(Opening Limit Switch )
&= = <=
YO(Open the door ) Y1(Close the door )

Fig. 1. Automatic Door Control System

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Control Purpose:

• When someone enters the infrared sensing field, opening motor starts working to open the door automatically till the door touches the opening limit switch.
• If the door touches the opening limit switch for 7 seconds and nobody enters the sensing field, the closing motor starts working to close the door automatically till the closing limit switch touched together.
• Stop the closing action immediately if someone enters the sensing field during the door closing process.

Q.8 (a) Explain the benefits of computers in measurements and control. 3

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(b) What is IOT? List advantage of IOT in industry. 4
(c) Explain Architecture and block diagram of PLC. 7

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