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- Question
Which one of the following land marks on the coast line must be depicted on hydrographic maps?
Options- A. shore line
- B. light houses
- C. church spires
- D. all the above.
- Correct Answer
- all the above.
- 1. Which one of the following lines is used for tying a ship with a dock
Options- A. bow line
- B. stern line
- C. spring line
- D. break line
- E. all of these. Discuss
- 2. Which one of the following statements is not relevant to hydrographic survey :
Options- A. establishment of a chain of bench marks near the shore line
- B. establishment of horizontal control points on the shore
- C. determination of the sea bed profile
- D. depicting the irregularities in the shore line, islands and projecting rocks
- E. none of these. Discuss
- 3. Pick up the correct statement from the following:
Options- A. the Mediterranean sea is considered to be a huge harbour
- B. the Caspean sea is considered to be a big harbour
- C. the Red sea is considered to be harbour
- D. none of the above. Discuss
- 4. Buoys which support the cables to which vessels are attached are of
Options- A. cylindrical shape
- B. drum
- C. pear shaped
- D. spherical shape
- E. all of these. Discuss
- 5. Pick up the incorrect statement from the following: In a dry dock block made of hard wood,
Options- A. spacing of the blocks is 1.35 m
- B. the lowest block is 1.8 m long 40 cm x 40 cm in cross-section
- C. the middle block is 1.6 m long 40 cm x 40 cm in crosss-section
- D. the top block is 1.2 m long 40 cm x 40 cm in cross-section
- E. none of these. Discuss
- 6. If h and h1 are the heights of a light house and the observer in a ship in metres above M S L then the horizontal distance from the ship to the light house in kilometres is
Options- A. 3.86 (h + h1)
- B. 3.86 (h - h1)
- C. 3.86 (h x h1)
- D. 3.86 ? (h + h1) Discuss
- 7. For location of soundings a range and one angle from the shore involves the following operations. Which one is correct?
Options- 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. Discuss
- 8. According to the recommendations of International Navigational Congress in 1912, the ratio of length to width at the entrance for cargo vessels is
Options- A. 5.5 and 6.0 to 1
- B. 6.2 and 6.8 to 1
- C. 7.4 and 7.8 to 1
- D. 8.2 and 8.5 to 1 Discuss
- 9. The width of the entrances of the harbours is restricted to
Options- A. 100 m
- B. 125 m
- C. 150 m
- D. 180 m Discuss
- 10. A lead line or sounding line
Options- 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. is generally used for depths exceeding 6 m
- E. all the above. Discuss
Docks and Harbours problems
Search Results
Correct Answer: all of these.
Correct Answer: none of these.
Correct Answer: the Mediterranean sea is considered to be a huge harbour
Correct Answer: all of these.
Correct Answer: none of these.
Correct Answer: 3.86 (h + h1)
Correct Answer: All the above.
Correct Answer: 7.4 and 7.8 to 1
Correct Answer: 180 m
Correct Answer: all the above.
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