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.)

0.34 VF

1.5 VF

3.4 VF

0.5 VF

TRUE ANSWER : ?
YOUR ANSWER : ?

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

(i) and (ii) are correct

(i) and (iii) are correct

Only (iii) is correct

Only (ii) is 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 mean sea level

1.2 H to 1.25 H above the low water level

1.2 H to 1.25 H above the datum

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 but R is not the correct explanation of A.

A is false but R is true.

A is true but R is false.

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

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 (ii) are correct

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

(i) and (iii) are correct

(ii) and (iii) are correct

TRUE ANSWER : ?
YOUR ANSWER : ?

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

B or 30 m

1.5 B or 50 m

50 m

1.5 B

TRUE ANSWER : ?
YOUR ANSWER : ?

A ship is berthed in a chamber and lifted by principles of buoyancy Such a chamber is called.

Wet dock

Refuge dock

Dry dock

Floating dock

TRUE ANSWER : ?
YOUR ANSWER : ?

A ship strikes the berth generally at an angle

30° with the face of the dock

90° with the face of the dock

45° with the face of the dock

10° with the face of the dock

TRUE ANSWER : ?
YOUR ANSWER : ?

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

sea wall with concave face

stepped sea wall

sea wall with batter

vertical sea wall

TRUE ANSWER : ?
YOUR ANSWER : ?

If the maximum spring rise is 2 m and height of the waves expected is 4 m , then the breakwater height above the datum will be

2.5 m

4 m

5 m

7 m

TRUE ANSWER : ?
YOUR ANSWER : ?

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