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 For the purpose of the Rules，except where otherwise required，the term（）.
单项选择题 FLOATING，CAUSED BY WINDS AND CURRENT WITH A DETERMINABLE DIRECTION defines（）.
单项选择题 By day，you sight a vessel displaying three shapes in a vertical line. The top and bottom shapes are balls，and the middle shape is a diamond. It could be a（）.