Docks and Harbours problems
- 1. On a hydrographic map, the following feature is shown :
Options- A. datum
- B. high and low water lines
- C. depth contours
- D. land and water areas
- E. all the above. Discuss
Correct Answer: all the above.
- 2. Pick up the correct statement from the following:
Options- A. For nautical purposes, low water level is generally referred to by the navigators
- B. The depth of the bed of the sea from the surface of water is called sounding
- C. The contour lines on the bed of a water body are called fathoms
- D. All the above. Discuss
Correct Answer: All the above.
- 3. Pick up the correct statement from the following:
Options- A. The direction of the littoral drift depends upon the direction of the wave with respect to the coastline
- B. The direction of a river opening to the sea determines the direction of no littoral drift
- C. Harbour in the path of littoral drift is not constructed to avoid a build up of sand on one side and erosion on the other
- D. all of the above. Discuss
Correct Answer: all of the above.
- 4. The heaviest line is used to democrate
Options- A. the low water line
- B. the high water line
- C. the limit of swamps
- D. the direction of current. Discuss
Correct Answer: the high water line
- 5. Pick up the correct statement from the following:
Options- A. The breakwater which can be used as a platform for loading and unloading of cargo is called a mole
- B. The brick masonry retaining wall which is used for loading and unloading of cargo is called guay wall
- C. Three types of break waters are generally provided in harbours
- D. All of the above. Discuss
Correct Answer: All of the above.
- 6. Soundings are required for
Options- A. making nautical charts for navigation
- B. ascertaining the areas subject to scour or silting
- C. obtaining detailed information for construction
- D. all the above. Discuss
Correct Answer: all the above.
- 7. Pick up the correct statement from the following:
Options- A. The artificial barrier constructed to enclose "n area for safe anchorage, is called break water
- B. The smoothened surface at the top end of the vertical face of a guay wall, is called fending
- C. The effective berthing lengths of inclined guays can be adjusted
- D. All the above. Discuss
Correct Answer: All the above.
- 8. The horizontal angles from the boat between A and B and B and C, the stations on the shore are respectively ?1 and ?2. The distances AB = L1 and BC = L2. For calculating the angle ?2 at C between the boat and station B is obtained by using the following formula: where (? is horizontal angle between A and C at B).
Options- A.
- B. ?t tan ?2 = 360° - (?1 + ?2 + ?) = ?
- C.
- D. all the above. Discuss
Correct Answer: all the above.
- 9. The dock wall is designed as a gravity retaining wall and is tested for
Options- A. back fill pressure when the dock is empty
- B. maximum water pressure from the dock without any back fill
- C. the load charge transmitted to the dock by the movement of loaded vehicles or trains on the way
- D. all of the above. Discuss
Correct Answer: all of the above.
- 10. Pick up the correct statement from the following:
Options- A. The regular periodic rise and fall of the surface of the sea, is called tide.
- B. The average difference in water level between high tide and low tide at a place, is called tidal range
- C. The movement of water caused by the action of tide, is called a tidal current
- D. all of the above. Discuss
Correct Answer: all of the above.
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