Jawaharlal Nehru Technological University Hyderabad
Jawaharlal Nehru Technological University Hyderabad B.Tech III PROCESS DYNAMICS AND CONTROL Previous Question Paper (May - 2019 - R16)
Note: This question paper contains two parts A and B. Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question carries 10 marks and may have a, b, c as sub questions.
PART - A
Write any two characteristics of first order process modeling.
Answer
Two characteristics of first-order process modeling are: 1) The process is characterized by a single time constant, which determines the speed of response. 2) The process exhibits a self-regulating nature, meaning it returns to a new steady state following a step change in input.
Distinguish between continuous process and batch process.
Answer
In a continuous process, raw materials are fed into the system and products are removed simultaneously at a steady rate, allowing for long-term, uninterrupted operation. In a batch process, a finite quantity of material is processed in a series of steps within a closed vessel, and the product is removed only after the cycle is complete.
Define proportional control mode
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Define continuous and Discontinuous mode of controller
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Write Ziegler- Nicolas turning formulae.
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What is ITAE and when to go for it?
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What is limit switch? Mention the types of limit switches.
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Differentiate split-range control and selective control.
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Define Control Valve sizing.
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Differentiate inherent and installed characteristics.
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PART - B
Obtain the mathematical modeling of CSTR.
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Derive Laplace transforms for below functions i) Ramp function ii) Sine function.
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Explain the hardware elements of process control system.
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Derive transfer function of single tank liquid level system with a suitable diagram.
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Compare Proportional, Integral and derivative controllers.
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What are the good practices in control for safety?
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Explain Integral control of a single capacitance process.
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Sketch the Nyquist diagram for PI controller.
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Explain controller tuning using Zeigler Nicholas method.
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Derive the transfer function for damped vibrator. Comment on type of dynamic response of the system.
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Explain controller tuning using one-quarter decay ratio.
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Write down the rule for Root locus diagram.
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Explain dynamic characteristics of a cascade control system.
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Explain about electric and hydraulic actuators.
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Explain split range control of typical processes.
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Discuss about the characteristics of globe and ball valves.
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Write short notes on dead time compensation.
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Explain predictive control multivariable model.
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Explain fluid flow through control valves.
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Discuss about the multivariable control with a boiler system.
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