單項(xiàng)選擇題During the month of October the Sun’s declination is（）.

A.north and increasing
B.north and decreasing
C.south and increasing
D.south and decreasing


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1.單項(xiàng)選擇題During the manufacture of line，yarns are twisted together in the（）.

A.opposite direction from which the fibers are twisted together to form strands
B.same direction the fibers are twisted to form strands
C.opposite direction from which the fibers are twisted together to form the line
D.opposite direction from which the fibers are twisted together forming cables

2.單項(xiàng)選擇題During the day，a vessel picking up a submarine cable shall carry（）.

A.three shapes，the highest and lowest shall be red balls，and the middle shall be a white diamond
B.two black balls
C.three shapes; the highest and lowest shall be black balls，and the middle shall be a red diamond
D.three shapes; the highest and lowest shall be black balls and the middle shall be a black diamond

3.單項(xiàng)選擇題During the day，a dredge will indicate the side on which it is safe to pass by displaying（）.

A.two balls in a vertical line
B.two diamonds in a vertical line
C.a single black ball
D.no shape is shown during the day

4.單項(xiàng)選擇題During the course of a voyage，a seaman falls on the main deck and injures his ankle. The Master should submit a Report of Marine Accident，Injury or Death if the（）.

A.injured is unfit for duty
B.injured is able to return to work
C.injury results in loss of life only
D.injury is the result of misconduct

5.單項(xiàng)選擇題During storm conditions on a ship，the mooring tensions should be adjusted so that（）.

A.all mooring lines have a different tension
B.the leeward lines have higher tension than the windward lines
C.the maximum tension of the most heavily loaded line does not exceed the safe working load
D.all horizontal tension forces on the windward lines are no greater than the vertical tension forces