航海英语海洋法基本知识单项选择题每日一练(2018.02.06)

单项选择题
Under the IALA-A Buoyage System，a green spar buoy with a triangular topmark would indicate that the buoy（）.
A.should be left to port when heading out to sea
B.may be left close aboard on either side
C.is on the north side of a point of interest
D.is marking the preferred channel
单项选择题
If the current and wind are in opposite directions，the sea surface represents（）.
A.a greatly reduced wind speed
B.a higher wind speed than what really exists
C.a lower wind speed than what really exists
D.more turbulent winds
单项选择题
What generally occurs when the land is cooler than the nearby water? （）
A.A land breeze
B.A sea breeze
C.A norther
D.A prevailing westerly
单项选择题
The boom stops on a pedestal crane prevent the boom from（）.
A.being raised too high
B.swinging at sea
C.overloading when not in use
D.being lowered too low
单项选择题
Most drill ships and barges have a walled opening below the derrick，open to the water’s surface and through which various drilling tools can pass down to the sea floor called a （）.
A.moon pool
B.spider deck opening
C.pontoon
D.keyway