| 41. |
_________________ are provided to overcome the differences of water level.
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Answer:
Option (b) |
| 42. |
_________________ is enclosed or partially enclosed basins provided with locks and entrance gate to keep the water level constant.
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Answer:
Option (c) |
| 43. |
___________________ is partially enclosed areas of water which are approached by open entrances and are subjected to fluctuations of water level.
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Answer:
Option (d) |
| 44. |
Which of the following docks can lift a ship by means of its own buoyancy?
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Answer:
Option (a) |
| 45. |
The entire length of marine railways would be over ____________________ times the length of the vessel to be docked.
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Answer:
Option (b) |
| 46. |
The use of marine railway dock is limited to vessels of not more than _______________________.
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Answer:
Option (c) |
| 47. |
The marine railway are laid at an inclination varying from _________________ to __________________.
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Answer:
Option (d) |
| 48. |
Keel blocks along the center line of dry dock is laid at ____________ center to center.
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Answer:
Option (a) |
| 49. |
Bilge blocks are set at an interval of _________________ length wise.
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Answer:
Option (b) |
| 50. |
________________________ are used to support the ship from bottom in graving dry dock.
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Answer:
Option (c) |