DOCKS AND HARBOR ENGINEERING QUIZ

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.)

0.5 VF

0.34 VF

3.4 VF

1.5 VF

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 false but R is true.

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.

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

(iii) and (iv) are correct

(i) and (iii) are correct

(i) and (ii) are correct

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 high water level

1.2 H to 1.25 H above the low water level

1.2 H to 1.25 H above the datum

1.2 H to 1.25 H above the mean sea level

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 1.87 Hs

1.27 Hs and 1.87 Hs

0.6 Hs and 1.67 Hs

1.27 Hs and 1.67 Hs

TRUE ANSWER : ?
YOUR ANSWER : ?

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

4.0 L

1 L

1.5 L

2.0 L

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following type of sea walls results in greatest protection of shore structures?

stepped sea wall

vertical sea wall

sea wall with batter

sea wall with concave face

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.

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.

TRUE ANSWER : ?
YOUR ANSWER : ?

Consider the following statements in regard to Beaufort scale for wind speeds,<br/>(i) The Beaufort number ranges from 1 to 12.<br/>(ii) Higher Beaufort number indicates higher speed of wind,<br/>(iii) Beaufort number for calm is smallest and for hurricane is highest of these statements

(i) and (iii) are correct

(i) and (ii) are correct

(ii) and (iii) are correct

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

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following are repair docks ?

wet docks, floating docks, lift docks, marine railways

wet docks, lift docks, marine railways, dry docks

marine railways, dry docks, floating docks, wet docks

dry docks, wet docks, floating docks, lift docks

TRUE ANSWER : ?
YOUR ANSWER : ?