單項(xiàng)選擇題A fiber towing hawser is readied for service by（）.

A.spooling it on a winch cathead
B.coiling it in a counterclockwise direction on the fantail
C.faking it on deck in a fore and aft direction
D.spooling it on a reel lying on its side to prevent rolling


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1.單項(xiàng)選擇題A drilling bit which is doughnut shaped to permit recovery of the center portion of the hole drilled is called a（）.

A.diverter bit
B.hole reamer
C.core bit
D.conventional bit

2.單項(xiàng)選擇題A drawbridge may use visual signals to acknowledge a vessel’s request to open the draw. Which signal indicates that the draw will NOT be opened immediately?（）

A.A flashing amber light
B.A fixed red light
C.A white flag raised and lowered vertically
D.A flashing white light

3.單項(xiàng)選擇題A Doppler speed log indicates speed through the water（）.

A.at all times
B.in the bottom return mode
C.in the volume reverberation mode
D.only when there is no current

4.單項(xiàng)選擇題A disadvantage of using chain lashing on heavy vehicles aboard Ro-Ro vessels is that it is （）.

A.heavy
B.easily damaged
C.affected by temperature
D.costly relative to the strength ratio