Docks and Harbour Engineering MCQ Quiz – Set 05

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Q1. The shape of docks and basins is generally kept

(A) Rectangular ways
(B) Diamond shape ways
(C) Inclined ways
(D) All of these

Q2. A lead line or sounding line

(A) Is stretched thoroughly when wet before it is graduated
(B) Should be soaked in water for about one hour prior to taking soundings
(C) Is adjusted at regular interval
(D) All the above

Q3. The important component of a sea port is

(A) Terminal buildings
(B) The docks
(C) The harbour
(D) All of these

(A) 100 m
(B) 125 m
(C) 150 m
(D) 180 m

Q5. The horizontal angles from the boat between A and B and B and C, the stations on the shore are respectively θ1 and θ2. The distances AB = L1 and BC = L2. For calculating the angle α2 at C between the boat and station B is obtained by using the following formula: where (β is horizontal angle between A and C at B).

(A) (sin α1/sin α2) = (L2 sin θ1/L1 sin θ2) = K
(B) αt tan α2 = 360° – (θ1 + θ2 + β) = φ
(C) tan α2 = sin φ/(K + cos φ)
(D) All the above

Q6. Pick up the correct statement from the following:

(A) The artificial barrier constructed to enclose “n area for safe anchorage, is called break water
(B) The smoothened surface at the top end of the vertical face of a guay wall, is called fending
(C) The effective berthing lengths of inclined guays can be adjusted
(D) All the above

Q7. The beach is built:

(A) With largest material locally available to the waves
(B) With large material locally available to the waves
(C) With fine material locally available to the waves
(D) With finest material locally available to the waves

Answer: (A) With largest material locally available to the waves

Q8. For location of soundings a range and one angle from the shore involves the following operations. Which one is correct?

(A) A range line is established
(B) The first and the last soundings and every tenth soundings are fixed by angular observations
(C) The intermediate soundings are fixed by the time intervals
(D) All the above

Q9. Pick up the correct statement from the following:

(A) The operation of removing material from the sea or river bed is known as
(B) Dredging
(C) Digging
(D) None of these

Answer: (A) The operation of removing material from the sea or river bed is known as

Q10. If H is the height of the wave expected, then the height of the breakwater is generally taken as

(A) 1.2 H to 1.25 H above the datum
(B) 1.2 H to 1.25 H above the low water level
(C) 1.2 H to 1.25 H above the high water level
(D) 1.2 H to 1.25 H above the mean sea level

Answer: (C) 1.2 H to 1.25 H above the high water level

Q11. Location of soundings by two angles from the shore requires establishing

(A) One range line parallel to shore
(B) One range line perpendicular to shore
(C) Two range lines mutually perpendicular
(D) No range line

(A) 30 m
(B) 35 m
(C) 45 m
(D) 40 m

Q13. Littoral drift

(A) Is the raised line of sand, parallel to the sea coast
(B) Is the slow movement of surface water at sea caused by the wind
(C) Is a current parallel to the shore, caused due to tangential component of the wind
(D) Is a current perpendicular to the shore line caused due to wind

Answer: (C) Is a current parallel to the shore, caused due to tangential component of the wind

Q14. Pick up the correct statement from the following:

(A) The direction of the littoral drift depends upon the direction of the wave with respect to the coastline
(B) The direction of a river opening to the sea determines the direction of no littoral drift
(C) Harbour in the path of littoral drift is not constructed to avoid a build up of sand on one side and erosion on the other
(D) All of the above

Answer: (D) All of the above

Q15. Which one of the following land marks on the coast line must be depicted on hydrographic maps?

(A) Shore line
(B) Light houses
(C) Church spires
(D) All the above