Q.1
The fixed mooring does not require
  • mooring post
  • bollard
  • anchors
  • capstan.
Q.2
Cretans :
  • are the harbours established on the island south east of Greek mainland
  • are the natives of crete, an island south of Greek mainland
  • are the plants, grown in the neighbourhood of harbours
  • none of the above.
Q.3
The important component of a sea port is
  • terminal buildings
  • the docks
  • the harbour
  • all of these.
Q.4
Which one of the following statements is not relevant to hydrographic survey :
  • establishment of a chain of bench marks near the shore line
  • establishment of horizontal control points on the shore
  • determination of the sea bed profile
  • depicting the irregularities in the shore line, islands and projecting rocks
  • E. none of these.
Q.5
The shore line survey includes :
  • depicting the shore line
  • depicting the prominent details on shore line
  • depicting the high water line
  • depicting the low water line
  • E. all the above.
Q.6
The smoothened surface of the front face of the guay walls, is known as fending which is made of
  • granite stone
  • timber
  • steel
  • all the above.
Q.7
A lead line or sounding line
  • is stretched thoroughly when wet before it is graduated
  • should be soaked in water for about one hour prior to taking soundings
  • is adjusted at regular interval
  • is generally used for depths exceeding 6 m
  • E. all the above.
Q.8
Which one of the following land marks on the coast line must be depicted on hydrographic maps ?
  • shore line
  • light houses
  • church spires
  • all the above.
Q.9
Depth of borings for soil investigation, is generally kept below low water level
  • 30 m
  • 35 m
  • 45 m
  • 40 m
Q.10
Littoral drift
  • is the raised line of sand, parallel to the sea coast
  • is the slow movement of surface water at sea caused by the wind
  • is a current parallel to the shore, caused due to tangential component of the wind
  • is a current perpendicular to the shore line caused due to wind.
Q.11
The heaviest line is used to democrate
  • the low water line
  • the high water line
  • the limit of swamps
  • the direction of current.
Q.12
If F is the fetch, the straight line distance of open water available in kilometres, the height of the wave in metres is
  • 0.15 F
  • 0.20 F
  • 0.28 F
  • 0.34 F
Q.13
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
  • break water
  • break wall
  • groins
  • shore wall.
Q.14
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
  • south east
  • south
  • south west
  • west
  • E. north west
Q.15
Flow of air from one place to the other is caused due to
  • the sum of elevation
  • pressure head
  • velocity head
  • all of the above.
Q.16
According to the recommendations of International Navigational Congress inthe ratio of length to width at the entrance for cargo vessels is
  • 5.5 and 6.0 to 1
  • 6.2 and 6.8 to 1
  • 7.4 and 7.8 to 1
  • 8.2 and 8.5 to 1
Q.17
Buoys which support the cables to which vessels are attached are of
  • cylindrical shape
  • drum
  • pear shaped
  • spherical shape
  • E. all of these.
Q.18
The beach is built:
  • with largest material locally available to the waves
  • with large material locally available to the waves
  • with fine material locally available to the waves
  • with finest material locally available to the waves.
Q.19
If ‘Hs’ is the significant wave height, then the average wave height and highest wave height respectively are given by
  • 0.6 Hs and 1.67 Hs
  • 0.6 Hs and 1.87 Hs
  • 1.27 Hs and 1.87 Hs
  • 1.27 Hs and 1.67 Hs
Q.20
At a given port, the fetch isnautical miles, the maximum height of storm wave will be
  • 2.073 m
  • 8.169 m
  • 9.144 m
  • 6.8 m
0 h : 0 m : 1 s