DOCKS AND HARBOR ENGINEERING QUIZ

Dead weight tonnage of a ship(i) varies with latitude and season(ii) is more than displacement tonnage(iii) is the difference between displacement load and displacement light Of these statements

(ii) and (iii) are correct

(i) and (ii) are correct

(i) and (iii) are correct

Only (iii) is correct

TRUE ANSWER : ?
YOUR ANSWER : ?

The significant wave height is defined is the average height of the

one – tenth highest waves

one – fifth highest waves

one – third highest waves

one – fourth highest waves

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:

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.

A is true but R is false.

TRUE ANSWER : ?
YOUR ANSWER : ?

A ship strikes the berth generally at an angle

10° with the face of the dock

90° with the face of the dock

45° with the face of the dock

30° with the face of the dock

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:

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

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

TRUE ANSWER : ?
YOUR ANSWER : ?

If H is the height of the wave expected, then the height of the breakwater is generally taken as

1.2 H to 1.25 H above the mean sea level

1.2 H to 1.25 H above the datum

1.2 H to 1.25 H above the low water level

1.2 H to 1.25 H above the high water level

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 and R is the correct explanation of

A is true but R is false.

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

TRUE ANSWER : ?
YOUR ANSWER : ?

As per Stevenson’s empirical formula, the approximate value of the height of the wave in metres is given by (where F is the fetch in km.)

0.34 VF

0.5 VF

1.5 VF

3.4 VF

TRUE ANSWER : ?
YOUR ANSWER : ?

When a ship floats at its designed water line, the vertical distance from water line to the bottom of the ship is known as

Free-board

Beam

Depth

Draft

TRUE ANSWER : ?
YOUR ANSWER : ?

The minimum diameter of turning besin, where ships turn by going ahead and without tug assistance should be

1.5 L

4.0 L

1 L

2.0 L

TRUE ANSWER : ?
YOUR ANSWER : ?