DOCKS AND HARBOR ENGINEERING QUIZ

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

(i) and (iii) are correct

(i) and (ii) are correct

Only (iii) is correct

TRUE ANSWER : ?
YOUR ANSWER : ?

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.

A is false but R is true.

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

Both A and R are true and R is the correct explanation of

A is true but R is false.

TRUE ANSWER : ?
YOUR ANSWER : ?

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.

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 a correct explanation of A.

TRUE ANSWER : ?
YOUR ANSWER : ?

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.

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 the correct explanation of A.

TRUE ANSWER : ?
YOUR ANSWER : ?

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:

Both A and R are true and R is the correct explanation of A.

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

A is true but R is false.

A is false but R is true.

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is a fixed type mooring accessory ?

cables

bollard

anchors

buoys

TRUE ANSWER : ?
YOUR ANSWER : ?

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 (ii) are correct

(i) and (iii) are correct

(iii) and (iv) are correct

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Swell

Clapotis

Fetch

Surf

TRUE ANSWER : ?
YOUR ANSWER : ?

If ‘Hs’ is the significant wave height, then the average wave height and highest wave height respectively are given by

0.6 Hs and 1.67 Hs

0.6 Hs and 1.87 Hs

1.27 Hs and 1.87 Hs

1.27 Hs and 1.67 Hs

TRUE ANSWER : ?
YOUR ANSWER : ?

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:

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

Both A and R are true and R is the correct explanation of A.

A is true but R is false.

A is false but R is true.

TRUE ANSWER : ?
YOUR ANSWER : ?