Docks and Harbor Engineering
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

Surf
Swell
Clapotis
Fetch

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

The length of design vessel + 10% clearance between adjacent vessels
Twice the length of design vessel
The length of design vessel
The length of design vessel + 20% clearance between adjacent vessels

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Docks and Harbor Engineering
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 is false but R is true.
Both A and R are true and R is the correct explanation of A.
A is true but R is false.
Both A and R are true but R is not the correct explanation of A.

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Docks and Harbor Engineering
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.

Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is not a correct explanation of A.
A is false but R is true.
A is true but R is false.

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