The welds used to attach stiffeners to a plate are known as（）.

单项选择题The type of joint formed when an edge of one plate is laid over the edge of the plate to which it is riveted is a（）.

A.grip joint
B.strap joint
C.thread joint
D.lap joint

单项选择题The type of joint formed when a third small plate is riveted over two plates butted together is called a（）.

A.butted joint
B.lap joint
C.strap joint
D.stringer joint

单项选择题The system of valves and cargo lines in the bottom piping network of a tanker that connects one section of cargo tanks to another section is called a（）.

A.come-along
B.crossover
C.manifold
D.runaround

单项选择题The strictest load line regulations apply to（）.

A.gas carriers
B.freighters (break-bulk)
C.passenger ships
D.tankers

单项选择题The shearing stresses on a ship’s structure are usually greatest at（）.

A.the bow
B.the stern
C.midships
D.the ship's quarter-length points