单项选择题
A.The faying surfaces are coated with white lead（or similar product）before the rivets are set
B.A sealing weld bead of 1/8 or less pitch is run along the plate edge
C.The plate edge is split close to an adjacent plate and mechanically forced into contact with the adjacent plate
D.A properly riveted joint will be watertight; any leakage is stopped by setting up on the rivets
单项选择题 Coiling new rope against the lay，bringing the lower end up through the center of the coil，then coiling with the lay，in order to remove the kinks，is known as（）.
单项选择题 Chafing gear is used to（）.
单项选择题 A stopper used in securing the ground tackle for sea that consists of a grab attached to a turnbuckle is a（）.