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Saturday, 6 October 2012

Dock and Harbour engineering-For B.E/B.Tech

1(a) How are the harbor surveys plotted? (6 Marks)
(b) What are the common errors in sextant and how are they rectified? (6 Marks)
(c) Write a note on formation of bars at the mouths of the rivers. (4 Marks)
 (d) The charted level is +3m. The height of the tide is 4m. What will be the effective depth of water? What will be the height of the tide at -0.2m?     (4 Marks)
2(a) What is a wind rose? Explain with a neat figure. (4 marks)
(b)Describe the different terms used in ship technology. (6 Marks)
(c) Write a note on the usage of figures of projected traffic while planning a new port. (6 Marks)
(d) Wind blows at 20 kmph. What is the pressure exerted on a surface at right angles to the wind? (4 Marks)
3(a) Explain Littoral drift and tidal currents. (6 Marks)
(b) Explain in detail different types of gravity wharves. (6 Marks)
(c) Write a short note on quay. (4 Marks)
(d) Design a channel and basin for a design ship of 25000 DWT for an estuarian port where tidal range is 7.2 m and wave height 3.1m outside harbor. (4 Marks)
4(a) What is rubble mound breakwater? Discuss the points in favour and against. (6 Marks)
(b) Distinguish between Mole and Pier. (6 Marks)
(c) What is a buoy? Illustrate its main shapes. (4 Marks)
(d) In a rubble mound breakwater, with maximum wave height of 2m, and slope 1 in 3, what is the weight of individual cap stone required for stones with specific weights of 2, 1.8 and 1.6. (4 Marks)
5(a) What is a platform mooring system? Explain. (6 Marks)
(b) What are the factors affecting RO-RO ferry service? Explain. (6 Marks)
(c) Compare the functions of dry dock and a lock. (4 Marks)
(d) Write notes on Groyne and Sand dune. (4 Marks)
6 (a) Write short notes on syncrolift and gridiron. (4 Marks)
(c) What are the different types of cranes and the suitability of each type used for cargo handling? (8 Marks)
(d) The biggest vessel to be slipped is a tug of 30m length and 3m draught. If the height of the cradle block from the slipway deck is to be 0.75 m and the inclination of the slipway to the horizontal is 3030. Find the total length of the slipway.  (4 Marks)
7(a) Distinguish between a transit shed and a warehouse. Discuss their functions. (6 Marks)
(b) Explain different types of harbor crafts. (4 Marks)
(c) What is the need for Navigational aids? Mention and explain different types of aides used on shore and at sea. (6 Marks)
(d) The quay is 220m in length and the shed is to be 175m. Assume that vertically bags 2m high could be stacked. What will be the width of the required shed for the storage of 10000 tonnes and with 40% space for movement? (4 Marks)
8 (a) Discuss the uses of hydraulic dredge on a pipe line and with hopper. (6 Marks)
(b) With the help of a neat sketch, explain the working of suction dredger. (8 Marks)
(c) Enumerate and briefly explain the types of cofferdams. (6 Marks)

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