Docks and Harbour Engineering

1. A dock:

1. Is a marine structure for berthing of vessels for loading and unloading cargo and passengers
2. Is provided with a dock gate
3. Is provided with an arrangement to pump out water when required
4. All the above

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2. A roadstead:

1. Is a protected area of water where boats can move safely
2. Is the end of the road at the harbour
3. May be protected by break water walls
4. None of these

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3. Surf zone is:

1. The fathom line of 10 m depth
2. The fathom line of 5 m depth
3. The swell of the sea breaking on the shore or reefs
4. The coast line attacked by the waves

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4. In tropical regions,

1. The surface gets heated more effectively than the arctic areas
2. After heating, the air becomes lighter and is displaced by cool air from the polar regions
3. The rising tropical air flows towards the polar region in the upper strata
4. All of the above

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5. A harbour is a place where

1. Ships get shelter and protection against destructive forces due to sea waves
2. Facilities are provided for receiving cargo and passengers
3. Port buildings are constructed for commercial purposes
4. All the above

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6. A lead line or sounding line

1. Is stretched thoroughly when wet before it is graduated
2. Should be soaked in water for about one hour prior to taking soundings
3. Is adjusted at regular interval
4. All the above

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7. 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

1. Break water
2. Break wall
3. Groins
4. Shore wall

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8. 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

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9. 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

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

1. 5.5 and 6.0 to 1
2. 6.2 and 6.8 to 1
3. 7.4 and 7.8 to 1
4. 8.2 and 8.5 to 1

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