單項(xiàng)選擇題

Which method is used to detect rot in manila lines?（）

A.Feeling the surface of the line for broken fibers
B.Measuring the reduction in circumference of the line
C.Observing for the appearance of mildew on the outer surface
D.Opening the strands and examining the inner fibers

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單項(xiàng)選擇題

Which measure should NOT be taken to reduce the pounding of a vessel in a head sea?（）

A.Add ballast in the afterpeak
B.Add ballast forward
C.Alter course
D.Reduce speed

單項(xiàng)選擇題

Which may ignite fuel vapors?（）

A.Static electricity
B.An open and running motor
C.Loose wiring
D.All of the above

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Which method is used to detect rot in manila lines?（）

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Which measure should NOT be taken to reduce the pounding of a vessel in a head sea?（）

Which may ignite fuel vapors?（）