DOCKS AND HARBOR ENGINEERING QUIZ

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 : ?

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

(i) and (iii) are correct

(ii) and (iii) are correct

(i) and (ii) are correct

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

TRUE ANSWER : ?
YOUR ANSWER : ?

The difference in height between highest high water and lowest low water is called

Maximum rise

Maximum range

Mean rise

Mean range

TRUE ANSWER : ?
YOUR ANSWER : ?

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

vertical sea wall

sea wall with concave face

sea wall with batter

stepped sea wall

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

Draft

Free-board

Beam

Depth

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.)

0.5 VF

0.34 VF

3.4 VF

1.5 VF

TRUE ANSWER : ?
YOUR ANSWER : ?

By increasing the rise of lock-gates,<br/>(i) The length of the lock gate will increase<br/>(ii) Transverse stress due to water pressure on the gate will increase<br/>(iii) Compressive force on the gate will increase

Only (ii) is correct

(i) and (ii) are correct

Only (iii) is correct

(i) and (iii) are correct

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 but R is not the correct explanation of A.

A is false but R is true.

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

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 and R is the correct explanation of

A is true but R is false.

A is false but R is true.

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

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following structures are constructed parallel to shore line to develop a demarcating line between land area and water area?

Sea walls, revetments and groynes

Sea walls, bulk heads and revetments

Bulk heads, revetments and groynes

Sea walls, bulk heads and groynes

TRUE ANSWER : ?
YOUR ANSWER : ?

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