Questions and answers for exam Preparation

MCQs

Total Questions : 242 | Page 19 of 25 pages

Question 181. 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), (ii) and (iii) are correct
(i) and (iii) are correct
(ii) and (iii) are correct
(i) and (ii) are correct

Discuss Question

Answer: Option A. -> (i), (ii) and (iii) are correct

Question 182. A ship strikes the berth generally at an angle

90° with the face of the dock
30° with the face of the dock
10° with the face of the dock
45° with the face of the dock

Discuss Question

Answer: Option C. -> 10° with the face of the dock

Question 183. 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.

Both A and R are true but R is not a correct explanation of A.
A is false but R is true.
Both A and R are true and R is the correct explanation of A.
A is true but R is false.

Discuss Question

Answer: Option C. -> Both A and R are true and R is the correct explanation of A.

Question 184. 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 is false but R is true.
Both A and R are true and R is correct explanation of A.
A is true but R is false.
Both A and R are true but R is not the correct explanation of A.

Discuss Question

Answer: Option B. -> Both A and R are true and R is correct explanation of A.

Question 185. Which of the following type of sea walls results in greatest protection of shore structures?

stepped sea wall
vertical sea wall
sea wall with concave face
sea wall with batter

Discuss Question

Answer: Option C. -> sea wall with concave face

Question 186. 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:

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

Discuss Question

Answer: Option D. -> Both A and R are true and R is the correct explanation of A.

Question 187. 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:

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

Discuss Question

Answer: Option D. -> Both A and R are true and R is the correct explanation of A.

Question 188. At a given port, the fetch is 400 nautical miles, the maximum height of storm wave will be

8.169 m
2.073 m
6.8 m
9.144 m

Discuss Question

Answer: Option D. -> 9.144 m

Question 189. 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

5 m
2.5 m
7 m
4 m

Discuss Question

Answer: Option C. -> 7 m

Question 190. 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.)