DOCKS AND HARBOR ENGINEERING QUIZ

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

Surf

Clapotis

Swell

Fetch

TRUE ANSWER : ?
YOUR ANSWER : ?

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

(i) and (ii) are correct

Only (iii) is correct

(i) and (iii) are correct

(ii) and (iii) are correct

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YOUR ANSWER : ?

In multiple point mooring system, vessel is secured to minimum of

Four points

Two points

Six points

Eight points

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The most popular method of construction of wall breakwaters is

Barge method

None of these

Staging method

Low level method

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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

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.

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YOUR ANSWER : ?

For designing the dock, the proportion of ship load assumed to be borne by keel blocks is

43906

43898

43967

43959

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Which of the following structures protects the shore by trapping of littoral drift?

moles

sea walls

groynes

revetments

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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

(i) and (iii) are correct

(iii) and (iv) are correct

(ii) and (iv) are correct

(i) and (ii) are correct

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At a given port, the fetch is 400 nautical miles, the maximum height of storm wave will be

2.073 m

8.169 m

6.8 m

9.144 m

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

one – fifth highest waves

one – third highest waves

one – tenth highest waves

one – fourth highest waves

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