A.at
B.on
C.in
D.above
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A.a blast of from five to seven seconds' duration
B.a blast of from five to six seconds' duration
C.a blast of from four to six seconds' duration
D.a blast of from six to seven seconds' duration
A.repair
B.repaired
C.repairing
D.to repair
A.I am altering my course to starboard
B.I am altering my course to port
C.I am operating astern propulsion
D.I am operating ahead propulsion
A.at all times
B.during evening hours
C.unless another person is present
D.during drilling operations
A.Manila line will usually last longer than nylon line
B.Nylon line is excellent for use in alongside towing
C.A normal safe working load will stretch nylon line 50%
D.Nylon stoppers should be used with nylon line
A.of
B.to
C.on
D.with
A.take part
B.watch
C.go to their quarters
D.stay out of the way and do what they want
A.Lacings
B.Lays
C.Strands
D.Twines
A.Dacron
B.Nylon
C.Esterlene
D.Polypropylene
A.on
B.by
C.in
D.for
最新試題
To safely anchor a vessel there must be sufficient scope in the anchor cable. Scope is the ratio of（）.
In battery charging rooms，ventilation should be provided（）.
Which tool is used to open the strands of fiber lines when making an eye splice?（）
The winch at Hatch No.3 is（）trouble.
In order to prevent galvanic corrosion，an aluminum boat must be insulated from the davits and gripes. Which of the following is acceptable as an insulator?（）
Good anchorage may be obtained anywhere in this water area，the bottom being generally mud and sand，vessel may have（）.
Geographic range is the maximum distance at which a light may be seen under（）.
If passengers are on board when an abandon ship drill is carried out，they should（）.
Where would you find the call sign or call letters of the radio station on your ship?（）
The winch is liable（）worn-out in this way.