单项选择题
The sprocket teeth on a wildcat are known as the（）.
A.pawls
B.devil's claws
C.whelps
D.pockets
点击查看答案&解析
相关考题
-
单项选择题
The ratio of the height of a vessel’s rudder to its width is referred to as the（）.
A.aspect ratio
B.constriction ratio
C.rudder ratio
D.steering ratio -
单项选择题
The projecting lugs of the rudderpost which furnish support to the rudder are called（）.
A.bases
B.gudgeons
C.pintles
D.rudder lugs -
单项选择题
The owner or Master of a towing vessel shall ensure that all tests and inspections of gear take place and are logged（）.
A.on each watch，immediately before being relieved
B.before embarking on a voyage of more than 24 hours
C.daily，at 1200 local zone time
D.weekly，before 0000 Sunday
