Deck 3: Maritime Engineering and Navigation

Question 1

In tropical regions,

A)The surface gets heated more effectively than the arctic areas
B)After heating, the air becomes lighter and is displaced by cool air from the polar regions
C)The rising tropical air flows towards the polar region in the upper strata
D)All of the above

Answer 1

All of the above

Question 2

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

A)Cylindrical shape
B)Pear shaped
C)Spherical shape
D)All of these

Answer 2

All of these

Question 3

Dead weight tonnage of a ship
(i) Varies with latitude and season
(ii) Is more than displacement tonnage
(iii) Is the difference between displacement load and displacementlight Of these statements

A)i) and ii) are correct
B)ii) and iii) are correct
C)i) and iii) are correct
D)Only iii) is correct

Answer 3

i) and iii) are correct

Question 4

The width of the entrances of the harbours is restricted to

A)100 m
B)125 m
C)150 m
D)180 m

Question 5

If H is the height of the wave expected, then the height of the breakwater is generally taken as

A)1.2 H to 1.25 H above the datum
B)1.2 H to 1.25 H above the low water level
C)1.2 H to 1.25 H above the high water level
D)1.2 H to 1.25 H above the mean sea level

Question 6

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

Question 7

Which one of the following statements is not relevant to hydrographic survey?

A)Establishment of a chain of bench marks near the shore line
B)Establishment of horizontal control points on the shore
C)Determination of the sea bed profile
D)None of these

Question 8

Pick up the correct statement from the following:

A)The breakwater which can be used as a platform for loading and unloading of cargo is called a mole
B)The brick masonry retaining wall which is used for loading and unloading of cargo is called quay wall
C)Three types of break waters are generally provided in harbours
D)All of the above

Question 9

Pick up the correct statement from the following:

A)The Mediterranean Sea is considered to be a huge harbour
B)The Caspian Sea is considered to be a big harbour
C)The Red sea is considered to be harbour
D)None of the above

Question 10

For large vessels, the buoys are strengthened by connecting it to a number of anchors having

A)One legged mooring
B)Two legged mooring
C)Three legged mooring
D)All the types as above

Question 11

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

A)The sum of elevation
B)Pressure head
C)Velocity head
D)All of the above

Question 12

A lead line or sounding line

A)Is stretched thoroughly when wet before it is graduated
B)Should be soaked in water for about one hour prior to taking soundings
C)Is adjusted at regular interval
D)All the above