Question: For designing the dock, the proportion of ship load assumed to be borne by keel blocks is________________?

• 1. 5/8
• 2. 3/8
• 3. 3/16
• 4. 5/16

Question: A ship is berthed in a chamber and lifted by principles of buoyancy Such a chamber is called_________________?

• 1. Dry dock
• 2. Wet dock
• 3. Floating dock
• 4. Refuge dock

Question: A ship strikes the berth generally at an angle_________________?

• 1. 90° with the face of the dock
• 2. 45° with the face of the dock
• 3. 30° with the face of the dock
• 4. 10° with the face of the dock

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

• 1. when the dock is empty
• 2. when the dock is empty with the ship of maximum tonnage
• 3. when the dock is full of water
• 4. when the dock is dry and is under construction

Question: Which of the following are repair docks ?

• 1. marine railways, dry docks, floating docks, wet docks
• 2. dry docks, wet docks, floating docks, lift docks
• 3. wet docks, floating docks, lift docks, marine railways
• 4. wet docks, lift docks, marine railways, dry docks

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

• 1. vertical sea wall
• 2. sea wall with batter
• 3. stepped sea wall
• 4. sea wall with concave face

Question: 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_________________?

• 1. Surf
• 2. Clapotis
• 3. Fetch
• 4. Swell

Question: The significant wave height is defined is the average height of the_________________?

• 1. one – third highest waves
• 2. one – fourth highest waves
• 3. one – fifth highest waves
• 4. one – tenth highest waves

Question: If H is the height of the wave expected, then the height of the breakwater is generally taken as______________________?

• 1. 1.2 H to 1.25 H above the datum
• 2. 1.2 H to 1.25 H above the low water level
• 3. 1.2 H to 1.25 H above the high water level
• 4. 1.2 H to 1.25 H above the mean sea level

Question: The difference in height between highest high water and lowest low water is called_______________?

• 1. mean range
• 2. maximum range
• 3. maximum rise
• 4. mean rise