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### Civil Engineering :: Docks and Harbours

1. According to the recommendations of International Navigational Congress in 1912, the ratio of length to width at the entrance for cargo vessels is

2.  A. 5.5 and 6.0 to 1 B. 6.2 and 6.8 to 1 C. 7.4 and 7.8 to 1 D. 8.2 and 8.5 to 1

3. Pick up the correct statement from the following:

4.  A. An artificial barrier which makes the enclosed area safe for anchorage of ships, is known as break water B. The break water whose inside is used as a plateform for loading and unloading is called a mole C. The length of the quay wall is governed by the length of the largest vessel likely to be berthed D. All the above.

5. Buoys which support the cables to which vessels are attached are of

6. A.

cylindrical shape

B.

drum

C.

pear shaped

D.

spherical shape

E.
 all of these.

7.  The beach is built:
8.  A. with largest material locally available to the waves B. with large material locally available to the waves C. with fine material locally available to the waves D. with finest material locally available to the waves.

9.  Flow of air from one place to the other is caused due to
10. A.
 the sum of elevation
B.

C.

D.

all of the above.

11. Pick up the correct statement from the following:

12.  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.

13.  Pick up the correct statement from the following:
14.  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.

15.  A low wall built out into the sea more or less perpendicular to the coast line, to resist the travel of sand and shingle along a beach, is calledbreak water
16.  A. break water B. break wall C. groins D. shore wall.

17.  At a place the shore line is along North West-South East. The wind is blowing from the north. The littoral drift will be along
18.  A. south east B. south C. south west D. west E. north west

19.  If F is the fetch, the straight line distance of open water available in kilometres, the height of the wave in metres is
20.  A. 0.15$$\sqrt{F}$$ B. 0.20 $$\sqrt{F}$$ C. 0.28  $$\sqrt{F}$$ D. 0.34 $$\sqrt{F}$$