单项选择题
How are riveted lap joints made watertight?（）
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
相关考题
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单项选择题
For the purpose of the Rules，except where otherwise required，the term（）.
A.vessel includes seaplanes
B.seaplane includes non-displacement craft
C.vessel engaged in fishing includes a vessel fishing with trolling lines
D.vessel restricted in her ability to maneuver includes fishing vessels -
单项选择题
FLOATING，CAUSED BY WINDS AND CURRENT WITH A DETERMINABLE DIRECTION defines（）.
A.Floating
B.Sailing
C.Drifting
D.Running into danger -
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（）.
A.vessel trolling
B.mineclearing vessel
C.trawler
D.vessel engaged in replenishment at sea
