JNTUH
JNTUH B.Tech IV Year PETROLEUM REFINERY ENGINEERING Previous Question Paper (December - 2019 - R15)
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
What is composition of crude that suits for asphalt manufacture?
Answer
Crude oils suitable for asphalt manufacture are typically naphthenic-based or intermediate-based crudes. These crudes are rich in heavy, high-molecular-weight hydrocarbons, resins, and asphaltenes, which provide the necessary ductility and binding properties required for asphalt production.
What type of impurities will exist in crude oil? Explain why crude distillation is important industrially.
Answer
Crude oil contains impurities such as water, dissolved salts (chlorides of sodium, calcium, and magnesium), sulfur compounds, nitrogen compounds, oxygenated compounds, and trace metals like vanadium and nickel. Crude distillation is industrially critical because it is the primary separation process that fractionates raw crude into usable streams (such as LPG, naphtha, kerosene, and gas oils) based on boiling points, serving as the essential foundation for all downstream refining operations.
What is the chemical composition of Gasoline? How it differs from wax and asphalt?
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What do you mean by Distillate fuels? Give few examples.
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What is Vis-breaking? Explain the importance.
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What do you mean by flexi coking? Distinguish flexi and delayed coking processes.
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Will aromatics produced in petroleum refineries need reduction? Explain.
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What do you mean by Moving bed hydro processes? Explain with examples.
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Write few important catalysts used in polymerization and alkylation processes.
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What do you mean by Acid gas removal? Explain why this step is essential.
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PART-B
What are the components of crude petroleum? Which countries have large crude petroleum reserves? Explain briefly.
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Compare and contrast Indian petroleum refineries with world petroleum reserves.
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Which type of composition of petroleum crude is suitable for asphalt manufacture? Discuss briefly.
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Discuss briefly about Crude distillation curves.
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What do you mean by topping of crude? Explain the working operation of Atmosphere topping unit with a neat diagram.
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Distinguish briefly the Heating oils and Residual fuel oils with examples.
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Write major differences between atmospheric and vacuum distillation units.
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Explain briefly about Jet and turbine fuels.
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What do you mean by Hydro-vis-breaking? Explain the process with a neat sketch.
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What is the main difference between coal and coke? Discuss the types, properties and uses of petroleum coke briefly.
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What are the main products of Hydro-cracking process? Explain the process in detail with reactions and mechanism.
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What do you mean by Reforming? Give few industrial reaction examples? Explain with a neat flow diagram the catalytic reforming process.
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What is the composition of vacuum tower bottoms? Discuss briefly.
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What is the actual driving force for solvent extraction operation? Explain the significance of Solvent extraction in petroleum refinery industry.
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Write Shorts Notes on:
Hydrofluoric acid alkylation process
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Waste water treatment.
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Discuss the salient points/approaches need to be taken care for waste water treatment and control of atmospheric pollution.
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