JNTU
JNTU B.Tech IV OFFSHORE ENGINEERING Previous Question Paper (November/December - 2018 - 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.
Part A
What is mooring line?
Answer
A mooring line is a high-strength cable, chain, or synthetic rope system used to secure a floating offshore structure to the seabed, ensuring it remains within a specific station-keeping envelope despite environmental forces like wind, waves, and currents.
Write working principle of Jack up rig.
Answer
A jack-up rig operates by lowering its independent or mat-supported legs to the seabed. Once the legs are firmly established, a jacking system elevates the hull above the water surface to a safe operational height, effectively converting the vessel into a stable, fixed platform.
Define centre of buoyancy.
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Describe dispersion relationship and dynamic pressure.
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What do you understand by catenary bridge?
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Write short notes on wave driven current.
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Define winch and anchor holding power.
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Write short notes on designation of ropes.
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What is riser? Write its types.
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Write short notes on riser clashing.
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Part B
Write short notes on field development using spiral concept.
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Explain about fixed platform with neat sketch.
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Write short notes on novel offshore field development.
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Explain the parameters which are required to develop novel offshore field.
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Explain about Morison’s diagram by drawing neat sketch.
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What is the response of fixed platform against the loads acting on it? Make free body diagram for different loads working on platform.
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What are the challenges to be faced during offshore drilling? Explain.
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Write short notes on ocean water properties.
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Describe about stability criteria of floating platform.
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Find out the meta centric height of floating body when moment of inertia, submerged volume and distance between centre of buoyancy and gravity are 2000 m4, 1200 m3 and 1.2 m.
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Explain about tower type platform in brief with neat diagram.
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Write short notes on different motions encountered in ship shaped vessel with suitable diagram.
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Explain basic catenary equation for mooring line with diagram.
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Write brief notes on turret mooring system. Explain by using diagram.
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Describe about acoustic position referencing system.
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Why is spiral design done in spar platform leg? Explain by using neat sketch.
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Write brief notes on drilling riser? Write its applications.
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What steps to be followed to save offshore platform leg from riser clashing?
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Explain about different VIV suppression devices.
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