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  • Question
  • 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 called


  • Options
  • A. break water
  • B. break wall
  • C. groins
  • D. shore wall.

  • Correct Answer
  • groins 


  • Docks and Harbours problems


    Search Results


    • 1. Flow of air from one place to the other is caused due to

    • Options
    • A. the sum of elevation
    • B. pressure head
    • C. velocity head
    • D. all of the above.
    • Discuss
    • 2. P and Q are two stations on the shore line at distance d. If the angle between Q and the boat O and P is a and the angle between P and Q at boat O is ?, the x and y. Coordinate along PQ and perpendicular to PQ from O are :

    • Options
    • A.
    • B.
    • C.
    • D. none of the above.
    • Discuss
    • 3. The shore line survey includes :

    • Options
    • A. depicting the shore line
    • B. depicting the prominent details on shore line
    • C. depicting the high water line
    • D. depicting the low water line
    • E. all the above.
    • Discuss
    • 4. The wavelength is computed by Bertin's formula (where T is the period in seconds).

    • Options
    • A.
    • B.
    • C.
    • D.
    • Discuss
    • 5. Cretans :

    • Options
    • A. are the harbours established on the island south east of Greek mainland
    • B. are the natives of crete, an island south of Greek mainland
    • C. are the plants, grown in the neighbourhood of harbours
    • D. none of the above.
    • Discuss
    • 6. Pick up the correct statement from the following:

    • Options
    • A. a harbour without any port complex, is called a refuge harbour
    • B. a harbour used for fishery, is called fishery harbour
    • C. the terminal building of a commercial harbour consists of an administrative block, customs clearance and ware-houses.
    • D. all the above.
    • Discuss
    • 7. The low water datum for a lake is defined as the surface of the lake when it is at elevation

    • Options
    • A. 180.5 m above M.S.L.
    • B. 190.5 m above M.S.L.
    • C. 170.5 m above M.S.L.
    • D. 200.0 m above M.S.L.
    • Discuss
    • 8. Pick up the correct statement from the following:

    • Options
    • A. The tides at any place occur a little less than 1 hour later, each succeeding day
    • B. The difference in time in solar hours and minutes from any lunar transit to the succeeding transit, is called high water level
    • C. The influence of the earth's gravity alone produces level-tidal less sea
    • D. The spinning force is maximum at the equator and zero at the poles
    • E. All of the above.
    • Discuss
    • 9. In a wet dock system,

    • Options
    • A. minimum required depth of water for the vessels is maintained
    • B. entrance locks are provided with massive gates
    • C. the locks of dock gate are operated by means of heavy bascule bridges and connected machinery
    • D. the cost of construction is quite heavy
    • E. all the above.
    • Discuss
    • 10. Pick up the incorrect statement from the following: In a dry dock block made of hard wood,

    • Options
    • A. spacing of the blocks is 1.35 m
    • B. the lowest block is 1.8 m long 40 cm x 40 cm in cross-section
    • C. the middle block is 1.6 m long 40 cm x 40 cm in crosss-section
    • D. the top block is 1.2 m long 40 cm x 40 cm in cross-section
    • E. none of these.
    • Discuss


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