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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 passenger vessels is :

  2. A.

    7.25 to 1

    B.

    7.80 to 1

    C.

    8.11 to 1

    D.

    8.44 to 1


  3. Pick up the correct statement from the following:

  4. A.

    The operation of removing material from the sea or river bed is known as

    B.

    Dredging

    C.

    Digging

    D.
    None of these.

  5. Littoral drift

  6. 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.


  7. The heaviest line is used to democrate

  8. A.
    the low water line
    B.

    the high water line

    C.

    the limit of swamps

    D.

    the direction of current.


  9. Which one of the following statements is correct?

  10. 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.


  11. Pick up the correct statement function following:

  12. A.

    The coarse material which has a smaller angle of repose, causes a steeper beach slope

    B.

    The coarse material which has a greater angle of repose, causes a steeper beach slope

    C.

    The flattening out of the beach is caused due to the movement of small and uniform particles leeward.

    D.
    both (b) and (c).

  13. The wavelength is computed by Bertin's formula (where T is the period in seconds).

  14. A.

    L = \( \frac { T } { 2 n} \) g

    B.

     L = \( \frac { T^2 } { 2 n} \)g

    C.

    L =\( \frac { 2T } { n} \) g

    D.

    L = \( \frac { 2T^2 } { n} \) g


  15. Pick up the correct statement from the following:

  16. 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.


  17. Depth of borings for soil investigation, is generally kept below low water level

  18. A.

    30 m

    B.

    35 m

    C.

    45 m

    D.

    40 m


  19. Which one of the following land marks on the coast line must be depicted on hydrographic maps ?

  20. A.

    shore line

    B.

    light houses

    C.

    church spires

    D.

    all the above.