航海英语安全用语章节练习(2017.12.23)

单项选择题
Which spoken emergency signal would you use to call a boat to come assist a man overboard?（）
A.Distress signal
B.Urgency signal
C.Safety signal
D.None of the above
单项选择题
Deficient oxygen content inside a chain locker can be detected with（）.
A.litmus paper
B.a combustible gas indicator
C.an oxygen breathing apparatus
D.an oxygen indicator
单项选择题
Which method of adjusting mooring lines is MOST useful for leaving a boat free to rise and fall with the tide?（）
A.Crossing the spring lines
B.Slacking all forward running lines while keeping all after running lines taut
C.Doubling up on spring or breast lines
D.Slacking bow and stern lines
单项选择题
The ship is not very stable，please（）when making a turn.
A.stop down
B.speed down
C.slow down
D.down slow
单项选择题
The term PROLONGED BLAST refers to（）.
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
单项选择题
Which mooring line is likely to undergo the most strain when docking a ship under normal conditions?（）
A.Bow line
B.Breast line
C.Spring line
D.Stern line
单项选择题
In the International Code of signals，a group of three letters indicates（）.
A.urgency or an emergency
B.the vessel's national identity signal
C.a group from the general signal code
D.a group from the medical signal code
单项选择题
Which tool is used to open the strands of fiber lines when making an eye splice?（）
A.Belaying spike
B.Fid
C.Heaver
D.Pricker
单项选择题
Keep clear（）the buoy.
A.to
B.on
C.of
D.for
单项选择题
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