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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Docks and Harbor Engineering
Assertion A : Basin walls have to be of much grater height than dock walls.Reason R : Tidal basins are subject to fluctuations of levels due to tidal variations.Select your answer based on the coding system given below:

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

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Docks and Harbor Engineering
In a two lane channel, bottom width of channel is given by

Manoeuvring lane + (2 × Bank clearance lane) + ship clearance lane
(2 × Manoeuvring lane) + (2 × Bank clearance lane + ship clearance lane)
(2 × Manoeuvring lane) + (2 × Bank clearance lane)
Manoeuvring lane + (2 × Bank clearance lane)

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Docks and Harbor Engineering
Which of the following are repair docks ?

wet docks, lift docks, marine railways, dry docks
dry docks, wet docks, floating docks, lift docks
wet docks, floating docks, lift docks, marine railways
marine railways, dry docks, floating docks, wet docks

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