Question 1

At a given port, the fetch is 400 nautical miles, the maximum height of storm wave will be
A)2.073 m
B)8.169 m
C)9.144 m
D)6.8 m

Accepted Answer

C

Question 2

Pick up the correct statement from the following:
A)Spring tides are caused at new and full moon
B)Neap tides are caused when the moon is in her quarters
C)Spring tides are roughly twice the height of neap tides
D)All of the above

Accepted Answer

All statements are correct. Spring tides occur during the new and full moon when the sun, moon, and Earth are aligned, causing higher tides. Neap tides happen when the moon is at its first or third quarter, leading to lower tides. Spring tides are generally about twice the height of neap tides due to the combined gravitational forces of the moon and sun.

Question 3

Which of the following is a fixed type mooring accessory?
A)Bollard
B)Buoys
C)Cables
D)Anchors

Accepted Answer

Bollards are fixed structures used on docks to which ships moor by attaching mooring lines. They are a fixed type mooring accessory, unlike buoys, cables, and anchors, which are mobile or part of the ship's equipment.

Question 4

According to the recommendations of International Navigational Congress in 1912, the ratio of length to width at the entrance for cargo vessels is
A)5.5 and 6.0 to 1
B)6.2 and 6.8 to 1
C)7.4 and 7.8 to 1
D)8.2 and 8.5 to 1

Accepted Answer

The answer of According to the recommendations of International Navigational...

Question 5

Consider the following statements.
(i) Fender is the cushion provided on the face of the jetty for ships to come in contact,
(ii) Slip is the space of water area between two adjacent piers where ships are berthed,
(iii) Pier head is a structure constructed near the tip of break water near the harbour entrance. Of the statements
A)(i) and (ii) are correct
B)(ii) and (iii) are correct
C)(i) and (iii) are correct
D)(i), (ii) and (iii) are correct

Accepted Answer

All statements are correct. Fenders are indeed used as cushions on jetties to prevent damage when ships come into contact. A slip refers to the water area between two piers for berthing ships. The pier head is a structure near the tip of a breakwater, often found near harbor entrances.

Question 6

Pick up the correct statement from the following:
A)For nautical purposes, low water level is generally referred to by the navigators
B)The depth of the bed of the sea from the surface of water is called sounding
C)The contour lines on the bed of a water body are called fathoms
D)All the above

Accepted Answer

The answer of Pick up the correct statement from the...

Question 7

The maximum harbour depth below lowest low water is generally equal to
(i) Loaded draft +1.2 m when bottom is rock
(ii) Loaded draft +1.8 m when bottom is soft
(iii) Loaded draft +1.2 m when bottom is soft
(iv) Loaded draft +1.8 m when bottom is rock
Of these statements
A)(i) and (ii) are correct
B)(i) and (iii) are correct
C)(ii) and (iv) are correct
D)(iii) and (iv) are correct

Accepted Answer

The answer of The maximum harbour depth below lowest low...

Question 8

Which one of the following statements is correct?
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)All the above

Accepted Answer

Soundings are indeed made with respect to a datum, often mean low water, to ensure consistency in depth measurements. Soundings below the datum are typically distinguished by being written in black, while heights or elevations above the datum can be noted in a different color, such as red, for clarity and distinction on maps or charts.

Question 9

Which of the following are repair docks?
A)Marine railways, dry docks, floating docks, wet docks
B)Dry docks, wet docks, floating docks, lift docks
C)Wet docks, floating docks, lift docks, marine railways
D)Wet docks, lift docks, marine railways, dry docks

Accepted Answer

The answer of Which of the following are repair docks?
A)Marine...

Question 10

The smoothened surface of the front face of the guay walls, is known as fending which is made of
A)Granite stone
B)Timber
C)Steel
D)All the above

Accepted Answer

Fending, which refers to the protective layer or construction designed to prevent damage to structures like quay walls, can indeed be made from a variety of materials including granite stone, timber, and steel, depending on the specific requirements and conditions of the structure it is meant to protect.

Question 11

Assertion A: Depth and width required at the entrance to a harbour are more than those required in the channel.Reason R: The entrance to a harbour is usually more exposed to waves as compared to the harbour itself.Select your answer based on the coding system given below:
A)Both A and R is true and R is the correct explanation of A
B)Both A and R is true but R is not the correct explanation of A
C)A is true but R is false
D)A is false but R is true

Accepted Answer

The entrance to a harbour needs to accommodate larger vessels and is more exposed to waves, requiring greater depth and width for safe navigation, which is why R correctly explains A.

Question 12

Pick up the incorrect statement from the following: In a dry dock block made of hard wood,
A)Spacing of the blocks is 1.35 m
B)The lowest block is 1.8 m long 40 cm × 40 cm in cross-section
C)The middle block is 1.6 m long 40 cm × 40 cm in cross-section
D)None of these

Accepted Answer

The statements given about the dry dock block made of hard wood, including the spacing of the blocks, and the dimensions of the lowest and middle blocks, do not contain any inaccuracies or contradictions based on standard practices. Therefore, without specific context or standards that contradict these dimensions, all provided statements are considered correct.

Question 13

Which one of the following lines is used for tying a ship with a dock?
A)Bow line
B)Stern line
C)Spring line
D)All of these

Accepted Answer

All of these lines, including bow lines, stern lines, and spring lines, are used in various configurations to secure a ship to a dock, each serving a specific purpose in stabilizing and positioning the vessel.

Question 14

In a wet dock system,
A)Minimum required depth of water for the vessels is maintained
B)Entrance locks are provided with massive gates
C)The cost of construction is quite heavy
D)All the above

Accepted Answer

In a wet dock system, the minimum required depth of water for the vessels is maintained, entrance locks are provided with massive gates to control water flow and maintain water levels, and the cost of construction is quite heavy due to the complexity and scale of the infrastructure needed.

Question 15

Assertion A: Marine structures are made specially bulky and strong. Reason R: Sea insects result in undermining of the hardest and the soundest building material Select your answer based on the coding system given below:
A)Both A and R is true and R is the correct explanation of A
B)Both A and R is true but R is not the correct explanation of A
C)A is true but R is false
D)A is false but R is true

Accepted Answer

The answer of Assertion A: Marine structures are made specially...

Question 16

A dock:
A)Is a marine structure for berthing of vessels for loading and unloading cargo and passengers
B)Is provided with a dock gate
C)Is provided with an arrangement to pump out water when required
D)All the above

Accepted Answer

A dock is indeed a marine structure designed for the berthing of vessels to facilitate the loading and unloading of cargo and passengers. It often includes a dock gate to control water entry and exit, and an arrangement to pump out water to maintain a suitable water level or to dry the dock for maintenance and repairs.

Question 17

Which of the following type of sea walls results in greatest protection of shore structures?
A)Vertical sea wall
B)Sea wall with batter
C)Stepped sea wall
D)Sea wall with concave face

Accepted Answer

Sea walls with concave faces are designed to reflect and dissipate wave energy more effectively than other designs, offering greater protection to shore structures by reducing the force of waves before they reach the shore.

Question 18

Pick up the correct statement from the following:
A)An artificial barrier which makes the enclosed area safe for anchorage of ships, is known as break water
B)The break water whose inside is used as a platform for loading and unloading is called a mole
C)The length of the quay wall is governed by the length of the largest vessel likely to be berthed
D)All the above

Accepted Answer

All the statements provided are correct. A breakwater is indeed an artificial barrier designed to protect an area from the impact of waves, making it safe for ships to anchor. A mole is a type of breakwater that also serves as a platform for loading and unloading goods or passengers. The length of a quay wall is typically determined based on the size of the largest vessel that is expected to dock there, ensuring that the infrastructure can accommodate the ship properly.

Question 19

If the maximum spring rise is 2 m and height of the waves expected is 4 m , then the breakwater height above the datum will be
A)2.5 m
B)4 m
C)5 m
D)7 m

Accepted Answer

The breakwater height should be the sum of the maximum spring rise and the height of the waves, which is 2 m + 4 m = 6 m. However, to ensure safety and account for additional factors like wave run-up, a common practice is to add an extra meter, making it 7 m.

Question 20

Pick up the correct statement function following:
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)

Accepted Answer

The coarse material with a greater angle of repose indeed results in a steeper beach slope because larger particles tend to stack more steeply. Additionally, the movement of small and uniform particles leeward can cause the beach to flatten out, as these particles can be easily moved and spread out by wind and water, leading to a more gradual slope.

Quiz 2: Marine Structures and Harbor Operations

At a given port, the fetch is 400 nautical miles, the maximum height of storm wave will be

Pick up the correct statement from the following:

Which of the following is a fixed type mooring accessory?

According to the recommendations of International Navigational Congress in 1912, the ratio of length to width at the entrance for cargo vessels is

Pick up the correct statement from the following:

The maximum harbour depth below lowest low water is generally equal to (i) Loaded draft +1.2 m when bottom is rock (ii) Loaded draft +1.8 m when bottom is soft (iii) Loaded draft +1.2 m when bottom is soft (iv) Loaded draft +1.8 m when bottom is rock Of these statements

Which one of the following statements is correct?

Which of the following are repair docks?

The smoothened surface of the front face of the guay walls, is known as fending which is made of

Assertion A: Depth and width required at the entrance to a harbour are more than those required in the channel.Reason R: The entrance to a harbour is usually more exposed to waves as compared to the harbour itself.Select your answer based on the coding system given below:

Pick up the incorrect statement from the following: In a dry dock block made of hard wood,

Which one of the following lines is used for tying a ship with a dock?

In a wet dock system,

Assertion A: Marine structures are made specially bulky and strong. Reason R: Sea insects result in undermining of the hardest and the soundest building material Select your answer based on the coding system given below:

A dock:

Which of the following type of sea walls results in greatest protection of shore structures?

Pick up the correct statement from the following:

If the maximum spring rise is 2 m and height of the waves expected is 4 m , then the breakwater height above the datum will be

Pick up the correct statement function following: