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 Swell Surf Fetch Clapotis TRUE ANSWER : ? YOUR ANSWER : ?
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 4 m 7 m TRUE ANSWER : ? YOUR ANSWER : ?
Dead weight tonnage of a ship<br/>(i) varies with latitude and season<br/>(ii) is more than displacement tonnage<br/>(iii) is the difference between displacement load and displacement light of these statements (i) and (ii) are correct Only (iii) is correct (ii) and (iii) are correct (i) and (iii) are correct TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following structures are constructed parallel to shore line to develop a demarcating line between land area and water area? Sea walls, bulk heads and revetments Sea walls, bulk heads and groynes Sea walls, revetments and groynes Bulk heads, revetments and groynes TRUE ANSWER : ? YOUR ANSWER : ?
By increasing the rise of lock-gates, (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 Only (iii) is correct (i) and (iii) are correct Only (ii) is correct (i) and (ii) are correct TRUE ANSWER : ? YOUR ANSWER : ?
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 is true but R is false. A is false but R is true. Both A and R are true but R is not a correct explanation of A. Both A and R are true and R is the correct explanation of A. TRUE ANSWER : ? YOUR ANSWER : ?
The significant wave height is defined is the average height of the one – fourth highest waves one – fifth highest waves one – third highest waves one – tenth highest waves TRUE ANSWER : ? YOUR ANSWER : ?
At a given port, the fetch is 400 nautical miles, the maximum height of storm wave will be 2.073 m 9.144 m 6.8 m 8.169 m TRUE ANSWER : ? YOUR ANSWER : ?
Minimum width of ship clearance shall be (where “B” is beam of the design vessel) 1.5 B or 50 m B or 30 m 1.5 B 50 m TRUE ANSWER : ? YOUR ANSWER : ?
Consider the following statements.<br/>(i) Fender is the cushion provided on the face of the jetty for ships to come in contact,<br/>(ii) Slip is the space of water area between two adjacent piers where ships are berthed,<br/>(iii) Pier head is a structure constructed near the tip of a break water near the harbour entrance. <br/>Of the statements (i), (ii) and (iii) are correct (i) and (iii) are correct (i) and (ii) are correct (ii) and (iii) are correct TRUE ANSWER : ? YOUR ANSWER : ?