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

i) varies with latitude and season
ii) is more than displacement tonnage
iii) is the difference between displacement load and displacement light
select the correct statemens.
A. i) and ii) are correct
B. ii) and iii) are correct
C. i) and iii) are correct
D. Only iii) is correct

(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

A. 1.3412
B. 1.5612
C. 1.7412
D. 1.9412
where ‘t’ is the period in seconds for two successive waves to pass the same section

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

A. sea walls, bulk heads and groynes
B. sea walls, bulk heads and revetments
C. sea walls, revetments and groynes
D. bulk heads, revetments and groynes

A. 5/8
B. 3/8
C. 3/16
D. 5/16