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_________________?

Related Mcqs:

1. If H is the height of the wave expected, then the height of the breakwater is generally taken as______________________?

   A. 1.2 H to 1.25 H above the datum
   B. 1.2 H to 1.25 H above the low water level
   C. 1.2 H to 1.25 H above the high water level
   D. 1.2 H to 1.25 H above the mean sea level

2. If Hs is the significant wave height, then the average wave height and highest wave height respectively are given by_______________?

   A. 0.6 Hs and 1.67 Hs
   B. 0.6 Hs and 1.87 Hs
   C. 1.27 Hs and 1.87 Hs
   D. 1.27 Hs and 1.67 Hs

3. As compared to wall type breakwater, mound type breakwater_________________?

   A. requires skilled labour
   B. requires low maintenance cost
   C. requires less material
   D. results in less damage due to gradual failure

4. 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_________________?

   A. Surf
   B. Clapotis
   C. Fetch
   D. Swell

5. The significant wave height is defined is the average height of the_________________?

   A. one – third highest waves
   B. one – fourth highest waves
   C. one – fifth highest waves
   D. one – tenth highest waves

6. At a given port, the fetch is 400 nautical miles, the maximum height of storm wave will be_______________?

   A. 2.073 m
   B. 8.169 m
   C. 9.144 m
   D. 6.8 m

7. 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.

   A. Both A and R are true and R is the correct explanation of A.
   B. Both A and R are true but R is not the correct explanation of A.
   C. A is true but R is false.
   D. A is false but R is true.

8. By increasing the rise of lockgates_______________?

   (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
   select the correct statements?

   A. (i) and (ii) are correct
   B. (i) and (iii) are correct
   C. Only (ii) is correct
   D. Only (iii) is correct

9. As per Stevenson’s empirical formula, the approximate value of the height of the wave in metres is given by__________________?

   A. 0.34 VF
   B. 0.5 VF
   C. 1.5 VF
   D. 3.4 VF
   where F is the fetch in km

10. 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. Both A and R are true and R is the correct explanation of A.
    B. Both A and R are true but R is not correct explanation of A.
    C. A is true but R is false.
    D. A is false but R is true.