JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech III PROCESS DYNAMICS AND CONTROL Previous Question Paper (February - 2023 - R16)
i) Question paper consists of Part A, Part B.
ii) Part A is compulsory, which carries 25 marks. In Part A, Answer all questions.
iii) In Part B, Answer any one question from each unit. Each question carries 10 marks and may have a, b as sub questions.
PART - A
What do you mean by simple pressure? Give example.
Answer
Simple pressure, often referred to as static pressure, is the pressure exerted by a fluid at rest at a given point. It acts equally in all directions. An example is the pressure exerted by water at the bottom of a stationary storage tank due to the weight of the fluid column above it.
What is batch process and give its applications?
Answer
A batch process is a manufacturing method where a finite quantity of material is subjected to a series of processing steps in a single vessel or equipment to produce a specific product before the next batch begins. It is characterized by non-steady-state operation. Common applications include the production of pharmaceuticals, fine chemicals, specialty polymers, and food and beverage manufacturing.
What is the action of PI controller?
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Discuss ITAE.
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Define 1/4 decay ratio.
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Explain the concept of tuning by damped oscillation method.
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When a butterfly valve is used?
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Give the advantages and disadvantages of using a positioner in a control valve?
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What are the precautions to be taken while tuning cascade control scheme?
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List the conditions for effective cascade control.
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PART - B
Explain with suitable examples, the differences between the interacting and non-interacting processes.
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What is the inverse response? Explain its behavior with dynamic system.
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What is the need for mathematical modeling for process control? Explain the mathematical model for the first order thermal process?
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Distinguish between servo and regulator operation.
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With a neat schematic diagram, explain the single speed floating control.
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Explain the characteristics of three position control mode.
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What are the advantages and disadvantages of PID control actions?
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What is cycling in the process output in which control mode occurs?
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Explain how to find the controller settings using process reaction curve.
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Explain the procedure of determining the optimum settings for mathematically described process using frequency response.
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Discuss the principles of working of I/P converter.
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Explain the principle of direct and reverse acting pneumatic actuators with a neat sketch.
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Explain the characteristics of control valve.
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What is cavitation and flashing explain?
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List the merits and demerits of cascade control?
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With the help of example, explain about ratio control.
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Explain about feed forward control with an example from distillation column.
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Give the differences between feed forward controller and feedback controller with the help of an example.
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