Download GTU B.Tech 2020 Winter 5th Sem 3153618 Process Instrumentation Dynamics And Control Question Paper

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Subject Code:3153618

GUJARAT TECHNOLOGICAL UNIVERSITY

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BE- SEMESTER-V (NEW) EXAMINATION - WINTER 2020

Subject Name:Process Instrumentation Dynamics & Control

Time:10:30 AM TO 12:30 PM

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

1. (a) Explain the term: (i) Manipulated variable (ii) Controlled variable 03
2. (b) Write the mathematical representation of unit impulse function and derive its Laplace transform 04

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3. (c) Derive transfer function of mixing process with assumption. 07

Q.2

1. (a) State and prove final value theorem. 03
2. (b) Write down the type of second order system 04
3. (c) Explain the selection criteria for controllers. 07

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Q.3

1. (a) Explain the term: (i) Transfer function (ii) Deviation variable 03
2. (b) Differentiate Servo problem and regulator problem. 04
3. (c) Mention the procedure steps of Routh test used to check the stability of a control system 07

Q.4

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1. (a) Enlist the assumption involved in mercury thermometer system. 03
2. (b) Mention the following terms relating to control system (i) set point tracking (ii) disturbance rejection 04
3. (c) Find the stability of system using: routh stability criteria having characteristic equation: s⁴ + 8s³ + 18s² + 16s+ 5 =0 07

Q.5

1. (a) Differentiate between P-Controller and On-Off Controller. 03

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2. (b) Derive the step response of an underdamped second order system 04
3. (c) With neat sketch explain ‘principle, working and function of radiation pyrometer. 07

Q.6

1. (a) Derive transfer function of PI-Controller. 03
2. (b) A Control system is subjected to a step change of magnitude 10. The transfer function of control system is expresses as G(s) = 1/(0.95s²+0.3s+1) Calculate overshoot, Decay ration, ultimate value of response, maximum value of response 04

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3. (c) Explain working and construction of bimetallic thermometers. 07

Q.7

1. (a) How stability is mentioned for linear systems? 03
2. (b) With a neat figure explain the construction and working of Pneumatic Control Valve? 04
3. (c) Describe the working of any one vacuum measuring instrument with a neat sketch. 07

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Q.8

1. (a) Explain the component of stability 03
2. (b) Explain the component of control system 04
3. (c) Describe bubbler system for liquid level measurement with neat sketch. 07

Date:29/01/2021

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Total Marks: 56