航海英语狭水道、冰区与运河航行单项选择题每日一练(2019.03.12)

单项选择题
For operations in pack ice，a vessel should（）.
A.be on an even keel
B.be trimmed slightly by the head
C.have a drag of not more than 60 - 90 centimeters
D.be ballasted so the forefoot is near the surface
单项选择题
On a single-screw vessel the stern frame（）.
A.furnishes support to the rudder，propeller shaft，and transom frame
B.provides foundations for after mooring winches
C.provides foundations for the main propulsion engines
D.transfers the driving force of the propeller to the hull
单项选择题
A vessel proceeding along the course of a narrow channel shall keep as near to the outer limitof the channel which lies on her starboard side as it is safe and practicable.Which one of the followings does the statement express?（）.
A.A vessel shall proceed near the other vessel on her starboard side on the narrow channel since it is safe and practicable
B.A vessel shall avoid proceeding near the starboard outer limit of a narrow channel as long as it is safe and practicable
C.A vessel shall avoid proceeding along the channel because it is not safe and practicable
D.A vessel shall proceed near the starboard outer limit of a narrow channel to the degree in which it is safe and practicable
单项选择题
A towboat has the same draft as the barges it is pushing ahead. If the distance from the stern of the towboat to the head of the tow is 260m，where is the approximate location of the pivot point of the unit?（）
A.At the head of the tow
B.75m from the head of the tow
C.120m from the head of the tow
D.180m from the head of the tow
单项选择题
You are on an ice-reinforced vessel about to enter packice. You should（）.
A.enter the pack on the windward side where there is a well defined ice edge
B.trim to an even keel or slightly down by the bow to take maximum benefit of the ice reinforcement
C.take maximum advantage of coastal leads caused by offshore winds
D.look for areas of rotten ice and enter perpendicular to the ice edge