The difference in height between highest high water and lowest low water is called_______________?
A. mean range
B. maximum range
C. maximum rise
D. mean rise
Dock and Harbor Engineering
If H is the height of the wave expected, then the height of the breakwater is generally taken as______________________?
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
By increasing the rise of lockgates_______________?
By increasing the rise of lockgates_______________?
(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
select the correct statements?
A. (i) and (ii) are correct
B. (i) and (iii) are correct
C. Only (ii) is correct
D. Only (iii) is correct
The significant wave height is defined is the average height of the_________________?
The significant wave height is defined is the average height of the_________________?
A. one – third highest waves
B. one – fourth highest waves
C. one – fifth highest waves
D. one – tenth highest waves
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_________________?
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_________________?
A. Surf
B. Clapotis
C. Fetch
D. Swell
Which of the following type of sea walls results in greatest protection of shore structures?
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
Which of the following are repair docks ?
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
Which of the following conditions of loading imposes the greatest load on the foundation in case of dry docks?
Which of the following conditions of loading imposes the greatest load on the foundation in case of dry docks?
A. when the dock is empty
B. when the dock is empty with the ship of maximum tonnage
C. when the dock is full of water
D. when the dock is dry and is under construction
A ship strikes the berth generally at an angle_________________?
A ship strikes the berth generally at an angle_________________?
A. 90° with the face of the dock
B. 45° with the face of the dock
C. 30° with the face of the dock
D. 10° with the face of the dock
A ship is berthed in a chamber and lifted by principles of buoyancy Such a chamber is called_________________?
A ship is berthed in a chamber and lifted by principles of buoyancy Such a chamber is called_________________?
A. Dry dock
B. Wet dock
C. Floating dock
D. Refuge dock