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

Fetch
Swell
Surf
Clapotis

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Docks and Harbor Engineering
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

(ii) and (iv) are correct
(i) and (iii) are correct
(i) and (ii) are correct
(iii) and (iv) are correct

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Docks and Harbor Engineering
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:

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

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

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