单项选择题
Mechanical gearing of deck machinery such as the windlass or boat hoists should（）.
A.be open to view so，if a foreign object gets in the gearing，the operator can immediately stop the machinery
B.have a guard over the gearing
C.be painted a contrasting color from the base color in order to call attention to the gearing
D.not be operated if there is any crew within 10 feet of the machinery
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单项选择题
Lines or gear NOT in use should be（）.
A.conspicuously marked
B.stowed anywhere
C.left on deck
D.secured or stowed out of the way -
单项选择题
Laying out a line in successive circles flat on deck with the bitter end in the center is known as（）.
A.coiling
B.faking
C.flemishing
D.lining -
单项选择题
In plugging submerged holes on a vessel，rags，wedges，and other materials should be used in conjunction with plugs to（）.
A.reduce the water pressure on the hull
B.reduce the water leaking around the plugs
C.prevent progressive flooding
D.reduce the possibility of stress fractures
