JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech IV OFFSHORE ENGINEERING Previous Question Paper (May/June - 2019 - R15)
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
Distinguish onshore and offshore structures.
Answer
Onshore structures are built on land or in shallow coastal waters with direct access to the ground, typically supported by conventional foundations. Offshore structures are built in deep marine environments, requiring specialized foundations like piles or gravity bases to resist harsh hydrodynamic loads, wind, and currents.
What do you mean by Floating structures?
Answer
Floating structures are offshore platforms that are not rigidly fixed to the seabed but are kept in position by mooring systems or dynamic positioning. They derive their stability from buoyancy and are used primarily for drilling, production, and storage in deep waters where fixed structures are economically or technically unfeasible.
Define Wave-driven current.
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What is Steady wave drift force?
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What do you mean by floaters?
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Define fixed jacket. Write few salient points on design of fixed jacket.
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What is FPSO?
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What do you mean by Hull structure?
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What are the differences between burst check and collapse check?
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What do you mean by Vortex induced vibration of risers? Explain.
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Part B
Explain briefly the functions of offshore structures.
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What do you mean by Bottom-Supported fixed structures? Discuss in detail.
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Write short notes on Novel field development systems.
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What is the Technical basis for developing novel offshore structures? Explain briefly.
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What is Wave theory? Postulate the theory behind breaking waves and internal waves in detail.
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Write briefly the applicability of Morison force vs Diffraction force.
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Compare and contrast gravity loads, hydrostatic loads and resistance loads.
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Explain with a neat diagram the Tower-type offshore platform.
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What do you mean by Field development and concept selection activities? Explain briefly.
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Discuss in detail about Floating production storage and offloading systems.
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What do you mean by Spar? Discuss the design, Construction and installation.
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Explain in detail the fundamental aspects of the design of FPSO.
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Explain briefly about first order and second order Fatigue.
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Why Fatigue damage verification is an important issue in riser design? Explain random time domain non-linear analysis for fatigue analysis.
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Discuss in detail about VIV suppression devices.
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