Docks and Harbour Engineering MCQ Quiz - Set 06 - ObjectiveBooks

# Practice Test: Question Set - 06

1. If h and h1 are the heights of a light house and the observer in a ship in meters above M S L then the horizontal distance from the ship to the light house in kilometers is
(A) 3.86 (√h + √h1)
(B) 3.86 (√h - √h1)
(C) 3.86 (√h × √h1)
(D) 3.86 π (√h + √h1)

2. 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.
(A) Both A and R is true and R is the correct explanation of A
(B) Both A and R is true but R is not a correct explanation of A
(C) A is true but R is false
(D) A is false but R is true

(A) Is a protected area of water where boats can move safely
(B) Is the end of the road at the harbour
(C) May be protected by break water walls
(D) None of these

4. In tropical regions,
(A) The surface gets heated more effectively than the arctic areas
(B) After heating, the air becomes lighter and is displaced by cool air from the polar regions
(C) The rising tropical air flows towards the polar region in the upper strata
(D) All of the above

5. Buoys which support the cables to which vessels are attached are of
(A) Cylindrical shape
(B) Pear shaped
(C) Spherical shape
(D) All of these

6. As per Stevenson's empirical formula, the approximate value of the height of the wave in meters is given by
(A) 0.34 VF
(B) 0.5 VF
(C) 1.5 VF
(D) 3.4 VF
Where ‘F’ is the fetch in km

7. 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
(A) South east
(B) South
(C) South west
(D) North west

8. The wavelength is computed by Bertin's formula (where T is the period in seconds).
(A) L = (T/2π) g
(B) L = (/2π) g
(C) L = (2T/π) g
(D) L = (2/2π) g

9. Cretans:
(A) Are the harbours established on the island south east of Greek mainland
(B) Are the natives of Crete, an island south of Greek mainland
(C) Are the plants, grown in the neighbourhood of harbours
(D) None of the above

10. 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
(A) (i) and (ii) are correct
(B) (ii) and (iii) are correct
(C) (i) and (iii) are correct
(D) Only (iii) is correct

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