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

Clapotis

Fetch

Swell

Surf

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YOUR ANSWER : ?

Which of the following conditions of loading imposes the greatest load on the foundation in case of dry docks?

When the dock is dry and is under construction

When the dock is full of water

When the dock is empty

When the dock is empty with the ship of maximum tonnage

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As compared to wall type breakwater, mound type breakwater

Requires low maintenance cost

Requires skilled labor

Results in less damage due to gradual failure

Requires less material

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

Mean rise

Maximum range

Maximum rise

Mean range

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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 : ?

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 (ii) are correct

(i) and (iii) are correct

(ii) and (iii) are correct

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

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YOUR ANSWER : ?

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

4.0 L

2.0 L

1.5 L

1 L

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

revetments

sea walls

groynes

moles

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Consider the following statements.(i) Fender is the cushion provided on the face of the jetty for ships to come in contact,(ii) Slip is the space of water area between two adjacent piers where ships are berthed,(iii) Pier head is a structure constructed near the tip of a break water near the harbour entrance. Of the statements

(i) and (ii) are correct

(i) and (iii) are correct

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

(ii) and (iii) are correct

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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

(i) and (iii) are correct

Only (ii) is correct

Only (iii) is correct

(i) and (ii) are correct

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YOUR ANSWER : ?

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