# Civil Engineering - Docks and Harbours

### Exercise :: Docks and Harbours - Section 1

11.

According to the recommendations of International Navigational Congress in 1912, the ratio of length to width at the entrance for passenger vessels is :

 A. 7.25 to 1 B. 7.80 to 1 C. 8.11 to 1 D. 8.44 to 1

Explanation:

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12.

Pick up the correct statement from the following:

 A. The operation of removing material from the sea or river bed is known as B. Dredging C. Digging D. None of these.

Explanation:

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13.

Littoral drift

 A. is the raised line of sand, parallel to the sea coast B. is the slow movement of surface water at sea caused by the wind C. is a current parallel to the shore, caused due to tangential component of the wind D. is a current perpendicular to the shore line caused due to wind.

Explanation:

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14.

The heaviest line is used to democrate

 A. the low water line B. the high water line C. the limit of swamps D. the direction of current.

Explanation:

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15.

Which one of the following statements is correct?

 A. The soundings are made with respect to the mean low water B. The soundings which are below the datum are written in black on the map C. The spot heights of the features above datum are written in red on the map D. The decimal point of the sounding value is at the exact position of the sounding E. All the above.