Which of the following conditions of loading imposes the greatest load on the foundation in case of dry docks?

Which of the following structures are constructed parallel to shore line to develop a demarcating line between land area and water area?

In multiple point mooring system, vessel is secured to minimum of

As compared to wall type breakwater, mound type breakwater

In a two lane channel, bottom width of channel is given by

In basins subjected to strong winds and tide, the length of the berthing area should not be less than

A ship strikes the berth generally at an angle

If ‘Hs’ is the significant wave height, then the average wave height and highest wave height respectively are given by

The difference in height between highest high water and lowest low water is called

When a ship floats at its designed water line, the vertical distance from water line to the bottom of the ship is known as

By increasing the rise of lock-gates,
(i)     The length of the lock gate will increase
(ii)     Transverse stress due to water pressure on the gate will increase
(iii)    Compressive force on the gate will increase Of these statements

For designing the dock, the proportion of ship load assumed to be borne by keel blocks is

As per Berlin’s formula, the length of wave in metres is given by (Where ‘t’ is the period in seconds for two successive waves to pass the same section.)

When a wave strikes a vertical breakwater in deep water, it is reflected back and on meeting another advancing wave of similar amplitude merges and rises vertically in a wall of water. This phenomenon is called

Select the incorrect statement.

Pick up the correct statement from the following:

The significant wave height is defined is the average height of the

The fixed mooring does not require

A ship is berthed in a chamber and lifted by principles of buoyancy, such a chamber is called.

Due to the impact of water wave on a sea shore structure

Assertion A: Intervention of undulations in the sea bed reduces the depth of wave at the section. Reason R: No wave can have a height greater than the depth of water through which it passes Select your answer based on the coding system given below:

Surf zone is:

Assertion A: Basin walls have to be of much greater height than dock walls.Reason R: Tidal basins are subject to fluctuations of levels due to tidal variations Select your answer based on the coding system given below:

Pick up the correct statement from the following:

Which of the following structures protects the shore by trapping of littoral drift?

Pick up the correct statement from the following:

The minimum diameter of turning besin, where ships turn by going ahead and without tug assistance should be Where ‘L’ is the length of the largest ship to use the port

Pick up the correct statement from the following:

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

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

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

If F is the fetch, the straight line distance of open water available in kilometres, the height of the wave in metres is

Minimum width of ship clearance shall be
Where ‘B’ is beam of the design vessel

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:

The floating mooring does not require

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

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

Pick up the correct statement function following:

Consider the following statements in regard to Beaufort scale for wind speeds,
(i)      The Beaufort number ranges from 1 to 12.
(ii)     Higher Beaufort number indicates higher speed of wind,
(iii)     Beaufort number for calm is smallest and for hurricane is highest Of these statements

The shore line survey includes:

A harbour is a place where

If h and h1 are the heights of a light house and the observer in a ship in metres above M S L then the horizontal distance from the ship to the light house in kilometres is

Assertion A: Large size stones are required in stone revetment in shore protection.Reason R: Resistance of stone to wave force is proportional to its volume and wave force is proportional to the exposed area of the stone.Select your answer based on the coding system given below.

A roadstead:

In tropical regions,

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

As per Stevenson’s empirical formula, the approximate value of the height of the wave in metres is given by

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

The wavelength is computed by Bertin’s formula (where T is the period in seconds).

Cretans:

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 displacement light Of these statements

The shape of docks and basins is generally kept

The width of the entrances of the harbours is restricted to

The beach is built:

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

The horizontal angles from the boat between A and B and B and C, the stations on the shore are respectively 61 and 02. The distances AB = L1 and BC = L2. For calculating the angle a2 at C between the boat and station B is obtained by using the following formula: where 0 is horizontal angle between A and C at B).

For location of soundings a range and one angle from the shore involves the following operations. Which one is correct?

Location of soundings by two angles from the shore requires establishing

Pick up the correct statement from the following:

The heaviest line is used to democrat

On a hydrographic map, the following feature is shown:

Pick up the incorrect statement from the following:

On the sea shore structures, the water wave impact causes

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

The important component of a sea port is

Pick up the correct statement from the following:

Pick up the correct statement from the following:

Depth of borings for soil investigation, is generally kept below low water level

Which one of the following land marks on the coast line must be depicted on hydrographic maps?

The low water datum for a lake is defined as the surface of the lake when it is at elevation

The dock wall is designed as a gravity retaining wall and is tested for

Soundings are required for

Location of soundings by range and one angle is done by the surveyor

The variation of atmospheric potential is caused due to: