dock and harbor engineering MCQs – Page 2

Practise focused dock and harbor engineering questions with marked answers for exam preparation and subject revision.

dock and harbor engineering Mcqs
21. If H is the height of the wave expected, then the height of the breakwater is generally taken as______________________?
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A. 1.2 H to 1.25 H above the low water level

B. 1.2 H to 1.25 H above the mean sea level

C. 1.2 H to 1.25 H above the high water level

D. 1.2 H to 1.25 H above the datum

22. In a two lane channel, bottom width of channel is given by_______________?
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A. 2 x Manoeuvring lane + 2 x Bank clearance lane + ship clearance lane

B. Manoeuvring lane + 2 x Bank clearance lane

C. Manoeuvring lane + 2 x Bank clearance lane + ship clearance lane

D. 2 x Manoeuvring lane + 2 x Bank clearance lane

23. Consider the following statements?
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A. ) Slip is the space of water area between two adjacent piers where ships are berthed,

B. ect the correct statements?

C. ="color: #003f1a;">(i) Fender is the cushion provided on the face of the jetty for ships to come in contact,

D. i) Pier head is a structure constructed near the tip of a break water near the harbour entrance.</strong></span>

24. Which of the following structures are constructed parallel to shore line to develop a demarcating line between land area and water area ?
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A. sea walls, bulk heads and groynes

B. bulk heads, revetments and groynes

C. sea walls, bulk heads and revetments

D. sea walls, revetments and groynes

25. Which of the following structures protects the shore by trapping of littoral drift?
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A. groynes

B. moles

C. sea walls

D. revetments

26. Which of the following type of sea walls results in greatest protection of shore structures?
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A. stepped sea wall

B. vertical sea wall

C. sea wall with concave face

D. sea wall with batter

27. 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_________________?
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A. 5 m

B. 7 m

C. 2.5 m

D. 4 m

28. 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?
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A. ect your answer based on the coding system given below.

29. At a given port, the fetch is 400 nautical miles, the maximum height of storm wave will be_______________?
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A. 8.169 m

B. 2.073 m

C. 6.8 m

D. 9.144 m
30. The significant wave height is defined is the average height of the_________________?
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A. one fourth highest waves

B. one third highest waves

C. one tenth highest waves

D. one fifth highest waves

31. Minimum width of ship clearance shall be__________________?
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A. 50 m

B. 1.5 B or 50 m

C. 1.5 B

D. B or 30 m
32. As compared to wall type breakwater, mound type breakwater_________________?
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A. requires less material

B. requires low maintenance cost

C. results in less damage due to gradual failure

D. requires skilled labour

33. Which of the following is a fixed type mooring accessory ?
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A. bollard

B. cables

C. anchors

D. buoys

34. 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_________________?
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A. Fetch

B. Clapotis

C. Surf

D. Swell

35. As per Stevensons empirical formula, the approximate value of the height of the wave in metres is given by__________________?
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A. 1.5 VF

B. 3.4 VF

C. 0.34 VF

D. re F is the fetch in km

E. 0.5 VF