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__________________?

Related Mcqs:

1. 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

2. 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?

   Select your answer based on the coding system given below?

   A. Both A and R are true and R is 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

3. 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

   select the correct the correct statements.

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

4. In a two lane channel, bottom width of channel is given by_______________?

   A. Manoeuvring lane + 2 x Bank clearance lane
   B. 2 x Manoeuvring lane + 2 x Bank clearance lane
   C. 2 x Manoeuvring lane + 2 x Bank clearance lane + ship clearance lane
   D. Manoeuvring lane + 2 x Bank clearance lane + ship clearance lane

5. 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.

6. 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_________________?

   A. 2.5 m
   B. 4 m
   C. 5 m
   D. 7 m

7. Minimum width of ship clearance shall be__________________?

   A. B or 30 m
   B. 1.5 B or 50 m
   C. 1.5 B
   D. 50 m

   where “B” is beam of the design vessel

8. 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

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

   A. vertical sea wall
   B. sea wall with batter
   C. stepped sea wall
   D. sea wall with concave face

10. Select the incorrect statement ?

    A. The progress of work in low level method of mound construction is very slow.
    B. Barge method of mound construction is economical.
    C. In low level method of mound construction, the area of working is limited.
    D. In staging method of mound cons-truction, the work is not interrupted even during stormy weather