单项选择题
A chock is a（）.
A.deck fitting used to secure mooring lines
B.casting fitted at the side of a weather deck，used as a fairlead
C.sharp block of wood used to support hygroscopic cargo
D.smoke pipe for the galley stove
相关考题
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单项选择题
After splicing an eye in a piece of wire rope，the splice should be parceled and served to（）.
A.strengthen the line
B.increase its efficiency
C.prevent hand injury by covering loose ends
D.make the line more flexible -
单项选择题
A chock（）.
A.is a deck fitting used to shackle gear to the deck
B.permits easy jettisoning of deck cargo in an emergency
C.prevents stress concentration in the bulwark
D.provides openings through the bulwark for mooring lines -
单项选择题
A hydrostatic release mechanism for a liferaft（）.
A.must be wet before it will release
B.should be kept in a watertight cover except in an emergency
C.will inflate the raft in its cradle if operated manually
D.must be submerged to a certain depth to release automatically
