Jawaharlal Nehru Technological University Hyderabad
Jawaharlal Nehru Technological University Hyderabad B.Tech II SURVEYING AND OFFSHORE STRUCTURES Previous Question Paper (November/December - 2017 - R16)
Note: This question paper contains two parts A and B. Part A is compulsory (25 marks). Part B consists of 5 Units (50 marks). Answer any one full question from each unit.
Part A
Answer all questions:
What is a well-conditioned triangle and why is it preferred?
Answer
A well-conditioned triangle is one in which the angles are between 30° and 120°. It is preferred because it minimizes the effect of errors in angular measurement on the calculated lengths of the sides, ensuring higher precision in triangulation.
What is theodolite traversing?
Answer
Theodolite traversing is a method of surveying in which a series of connected lines are established by measuring the lengths of the lines with a tape or chain and the angles between them with a theodolite. It is used to determine the relative positions of points on the ground for mapping or control purposes.
What is line of collimation?
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State the characteristics of contour lines.
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Give different types of soundings.
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What is Global Positioning System?
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How are ocean waves classified?
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What are the main dimensions associated with the waves.
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What are the main categories of offshore structure?
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Differentiate between fixed and compliant offshore platforms.
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Part B
Discuss in brief the principles of surveying.
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Explain different sources of errors in chain surveying.
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What are ‘face left’ and ‘face right’ observations? Why is it necessary to take both face observations?
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State what errors are eliminated by repetition method. How will you set out a horizontal angle by method of repetition?
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Describe in the detail the processes of differential levelling.
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Write a short note on the uses of contour maps for engineering purposes.
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Describe in the detail the processes of profile levelling.
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Classify the methods of contouring.
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Describe the various methods of plotting the soundings.
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Explain briefly, how we can perform topographic survey with total station.
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Write briefly on shoreline survey.
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Discuss in details the various GPS surveying techniques.
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Explain the role of hydrographic surveying in Geomatics.
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Discuss the surface and visual positioning techniques.
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Explain various bathymetric survey methods.
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What is seismic survey and how does it work?
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A ship having a displacement of 8000 tones has a draft of 4m in the ocean. If the water plane area is 800 m2, how much will the draft be when it enters fresh water? Density of sea water is 1020 kg/m3.
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Name three compliant platforms and explain any one type.
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A ship of weight 3000 kN floats in sea water. The centre of gravity of the vessel is 1.6 m above the centre of buoyancy. The time period of oscillation of the vessel is 6 sec. If the moment of inertia of the vessel at the water surface is 6000 m4, find the radius of gyration of the vessel. Density of sea water is 1022 kg/m3.
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Classify offshore structures in detail.
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