Assertion A : Intervention of undulations in the sea bed reduces the depth of wave at the section. Reason R : No wave can have a height greater than the depth of water through which it passes?

Related Mcqs:

1. 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

2. Assertion A : Large size stones are required in stone revetment in shore protection. Reason R : Resistance of stone to wave force is proportional to its volume and wave force is proportional to the exposed area of the stone?

   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 a correct explanation of A
   C. A is true but R is false
   D. A is false but R is true

3. 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.

4. 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.

5. 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

6. 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

7. 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

8. 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

9. 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

10. The difference in height between highest high water and lowest low water is called_______________?

    A. mean range
    B. maximum range
    C. maximum rise
    D. mean rise