單項選擇題Manila lines in which the strands are right-hand laid（）.

A.should be coiled in a clockwise direction
B.should be coiled in a counterclockwise direction
C.may be coiled either clockwise or counterclockwise
D.should never be coiled


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1.單項選擇題Mariners are warned that fog signals should（）be relied upon implicity.

A.always
B.never
C.sonetimes
D.sometime

2.單項選擇題Molded depth is measured from the（）.

A.inside of the shell
B.outside of the shell
C.top of the center vertical keel
D.top of the garboard stake

3.單項選擇題Mooring（）are placed on both banks of the Suez Canal about 200m apart.

A.bollards
B.ballasts
C.bands
D.benefits

4.單項選擇題Mooring lines should be turned end-for-end occasionally. This is because（）.

A.a line is weakened by constantly pulling on it in one direction
B.normal wear on the line is thus distributed to different areas
C.it prevents the line from kinking or unlaying
D.it prevents permanent misalignment of the line's internal strands

5.單項選擇題Most propellers on merchant vessels are constructed of（）.

A.managanese bronze
B.cast iron
C.mild steel
D.improved plow steel