## Docks and Harbor Engineering Assertion A : Marine structures are made specially bulky and strong.Reason R : Sea insects result in undermining of the hardest and the soundest building material. Select your answer based on the coding system given below:

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

## 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

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

## Docks and Harbor Engineering Which of the following conditions of loading imposes the greatest load on the foundation in case of dry docks?

When the dock is empty
When the dock is empty with the ship of maximum tonnage
When the dock is full of water
When the dock is dry and is under construction

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

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

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

## Docks and Harbor Engineering By increasing the rise of lock-gates,(i) The length of the lock gate will increase(ii) Transverse stress due to water pressure on the gate will increase(iii) Compressive force on the gate will increase

Only (ii) is correct
Only (iii) is correct
(i) and (iii) are correct
(i) and (ii) are correct