DOCKS AND HARBOR ENGINEERING QUIZ

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 : ?

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

1.27 Hs and 1.87 Hs

1.27 Hs and 1.67 Hs

0.6 Hs and 1.87 Hs

TRUE ANSWER : ?
YOUR ANSWER : ?

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

sea wall with batter

vertical sea wall

sea wall with concave face

stepped sea wall

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:

A is false but R is true.

Both A and R are true but R is not 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 : ?

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

Clapotis

Fetch

Surf

Swell

TRUE ANSWER : ?
YOUR ANSWER : ?

Assertion A : Intervention of undulations in the sea bed reduces the depth of wave at the section.Reason R : No wave can have a height greater than the depth of water through which it passes.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 correct explanation of A.

A is true but R is false.

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

TRUE ANSWER : ?
YOUR ANSWER : ?

As per Berlin's formula, the length of wave in meters is given by(Where ’t’ is the period in seconds for two successive waves to pass the same section.)

1.7412

1.5612

1.9412

1.3412

TRUE ANSWER : ?
YOUR ANSWER : ?

Minimum width of ship clearance shall be (where “B” is beam of the design vessel)

1.5 B

B or 30 m

50 m

1.5 B or 50 m

TRUE ANSWER : ?
YOUR ANSWER : ?

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

(ii) and (iii) are correct

(i) and (iii) are correct

(i) and (ii) are correct

(i), (ii) and (iii) 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 datum

1.2 H to 1.25 H above the high water level

1.2 H to 1.25 H above the mean sea level

1.2 H to 1.25 H above the low water level

TRUE ANSWER : ?
YOUR ANSWER : ?

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