单项选择题

Floors aboard ship are（）.

A.frames to which the tank top and bottom shell are fastened on a double bottomed ship
B.transverse members of the ships frame which support the decks
C.longitudinal beams in the extreme bottom of a ship from which the ship's ribs start
D.longitudinal angle bars fastened to a surface for strength

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单项选择题（）is not a static load.

A.Actual weight of the ship's structure，outfitting，equipment and machinery
B.Ballast load（weight）
C.Cargo load
D.Slamming and sloshing load

单项选择题（）is not a longitudinal structural member.

A.sideshell
B.bottom shell plating
C.inner bottom plating
D.transverse bulkhead

单项选择题What is used to prevent twisting of a towing bridle?（）

A.A bitt
B.A bulkhead
C.A V-spring
D.A fishplate

单项选择题What is the purpose of cant frames in steel vessels? （）

A.To support the overhang of the stern
B.To provide strength to shell plating at the stern
C.To add strength to the deck beams which support the weather decks
D.To support the plating of a cylindrical tank

单项选择题What is the purpose of a striker plate? （）

A.Provides surface for applying force on machinery
B.Provides landing surface for the sounding bob
C.Absorbs machinery vibration
D.Prevents valve stem over-travel