單項選擇題How does a coast radio station communicating by HF radio normally identify itself?（）

A.By its subscriber number
B.By its call sign
C.By its MMSI
D.By its MID


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1.單項選擇題How do you operate a portable CO2 fire extinguisher?（）

A.Point the horn down
B.Turn cylinder upside-down
C.Break the rupture disc
D.Pull pin，squeeze grip

2.單項選擇題How do you determine the weight of the vessel that is supported by the ground when a vessel has run aground?（）

A.This requires extensive calculation and is usually performed only by a naval architect not by a ship's officer
B.Determine the point where aground and the draft at that point，then calculate it using the grounding formula
C.Use the hydrostatic tables and enter with the mean draft before grounding and the mean draft after grounding
D.Use the inclining experiment formula and substitute the change of trim for the angle of list

3.單項選擇題How do the height and location of a tug’s towing bitts relate to the danger of tripping?（）

A.The further forward and closer to amidships the more readily the tug will trip
B.Placement further aft permits more effective pulling，better steering and eliminates the danger of tripping
C.Installing the bitts down low lowers the center of gravity
D.The height and position of towing bitts has no significance

4.單項選擇題How could lashing gear used aboard Ro-Ro vessels be stowed when not in use?（）

A.Drape along brackets
B.Hang vertically in a sheltered area
C.Stow in bins at hatch coming side
D.All of the above

5.單項選擇題How can you estimate the position of a tropical storm’s center?（）

A.With a radio weather bulletin or weather fax
B.using shipboard radar
C.observe the wind direction and apply Buys Ballot's law
D.All of the above