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

Accepted Answer

All the statements are correct. In tropical regions, the surface heats up more effectively than in arctic areas due to the direct angle of sunlight. This heating causes the air to become lighter and rise, creating a low-pressure area that draws in cooler air from the polar regions. The warm, tropical air that rises then flows towards the polar regions in the upper strata of the atmosphere, contributing to global atmospheric circulation patterns.

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

Accepted Answer

Buoys that support cables for vessels can come in various shapes including cylindrical, pear-shaped, and spherical. Each shape serves different purposes and conditions, making all of these options correct.

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

Accepted Answer

Dead weight tonnage (DWT) varies with latitude and season due to changes in water density, affecting buoyancy. It is the difference between displacement at load and light conditions, not more than displacement tonnage.

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

Accepted Answer

The answer of The width of the entrances of the...

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

Accepted Answer

The height of the breakwater is generally taken as 1.2 H to 1.25 H above the high water level to ensure it can effectively break waves and protect the coast or harbor structures behind it, even during high tide conditions.

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

Accepted Answer

Littoral drift refers to the movement of sediment along the coast by wave action, which is primarily caused by the tangential component of the wind. This process results in a current that moves parallel to the shore, redistributing sand and other materials along the coastline.

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

Accepted Answer

All the options (A, B, and C) are relevant to hydrographic surveying. Establishing benchmarks and horizontal control points are part of the preparatory work for such surveys, and determining the sea bed profile is a core activity of hydrographic surveys.

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

Accepted Answer

All statements are correct: A mole is indeed a type of breakwater that doubles as a platform for loading and unloading cargo. A quay wall is a type of retaining wall, often made of masonry or concrete, serving a similar purpose for cargo handling. Harbors typically feature various types of breakwaters for protection and operational efficiency, indicating that there are indeed multiple types of breakwaters used in harbor design.

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

Accepted Answer

The Mediterranean Sea is often referred to as a huge harbour due to its historical significance as a major route for trade and cultural exchange, surrounded by many countries with numerous ports.

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

Accepted Answer

Large vessels often use a variety of mooring configurations to ensure stability and security, including one, two, and three-legged mooring systems. Each type has its specific applications and advantages, depending on the conditions and requirements of the mooring site.

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

Accepted Answer

The answer of Flow of air from one place to...

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

Accepted Answer

All the options are correct practices for preparing or maintaining a lead line or sounding line. Stretching it when wet before graduation ensures accuracy, soaking it in water makes it more pliable and ensures it sinks properly, and regular adjustments are necessary to maintain its accuracy over time.

Quiz 3: Maritime Engineering and Navigation

In tropical regions,

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

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

The width of the entrances of the harbours is restricted to

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

Littoral drift

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

Pick up the correct statement from the following:

Pick up the correct statement from the following:

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

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

A lead line or sounding line