Docks and Harbour Engineering

21. At a place the shore line is along North West-South East. The wind is blowing from the north. The littoral drift will be along

  1. South east
  2. South
  3. South west
  4. North west

Correct answer: (A)
South east

22. Buoys which support the cables to which vessels are attached are of

  1. Cylindrical shape
  2. Pear shaped
  3. Spherical shape
  4. All of these

Correct answer: (D)
All of these

23. 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
Of these statements

  1. (i) and (ii) are correct
  2. (i) and (iii) are correct
  3. Only (ii) is correct
  4. Only (iii) is correct

Correct answer: (A)
(i) and (ii) are correct

24. Consider the following statements in regard to Beaufort scale for wind speeds,
(i) The Beaufort number ranges from 1 to 12.
(ii) Higher Beaufort number indicates higher speed of wind,
(iii) Beaufort number for calm is smallest and for hurricane is highest
Of these statements

  1. (i) and (ii) are correct
  2. (ii) and (iii) are correct
  3. (i) and (iii) are correct
  4. (i), (ii) and (iii) are correct

Correct answer: (B)
(ii) and (iii) are correct

25. 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 break water near the harbour entrance.
Of the statements

  1. (i) and (ii) are correct
  2. (ii) and (iii) are correct
  3. (i) and (iii) are correct
  4. (i), (ii) and (iii) are correct

Correct answer: (D)
(i), (ii) and (iii) are correct

26. Cretans:

  1. Are the harbours established on the island south east of Greek mainland
  2. Are the natives of Crete, an island south of Greek mainland
  3. Are the plants, grown in the neighbourhood of harbours
  4. None of the above

Correct answer: (B)
Are the natives of Crete, an island south of Greek mainland

27. Dead weight tonnage of a ship
(i) Varies with latitude and season
(ii) Is more than displacement tonnage
(iii) Is the difference between displacement load and displacement light
Of these statements

  1. i) and ii) are correct
  2. ii) and iii) are correct
  3. i) and iii) are correct
  4. Only iii) is correct

Correct answer: (C)
i) and iii) are correct

28. Depth of borings for soil investigation, is generally kept below low water level

  1. 30 m
  2. 35 m
  3. 45 m
  4. 40 m

Correct answer: (C)
45 m

29. Due to the impact of water wave on a sea shore structure

  1. Hydrostatic pressure coupled with a strong momentary impact is caused
  2. Vibrations are subjected
  3. Internal pressure is developed
  4. All of the above

Correct answer: (D)
All of the above

30. Flow of air from one place to the other is caused due to

  1. The sum of elevation
  2. Pressure head
  3. Velocity head
  4. All of the above

Correct answer: (D)
All of the above

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