單項選擇題Flame screens are used to（）.

A.contain flammable fumes
B.protect firefighters from flames
C.prevent flames from entering tanks
D.keep flames and sparks from getting out of an engine's exhanst system


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1.單項選擇題Flooding of any compartment in a ship that results in a serious loss of reserve buoyancy will always（）.

A.increase the ttrim
B.increase ship stability
C.cause a serious list
D.decrease the heeling moment

2.單項選擇題Floors aboard ship are（）.

A.also called decks
B.vertical transverse plates connecting the vertical keel with the margin plates
C.large beams fitted in various parts of the vessel for additional strength
D.found in passenger and berthing spaces only

3.單項選擇題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 ships ribs start
D.longitudinal angle bars fastened to a surface for strength

4.單項選擇題Frames to which the tank top and bottom shell are fastened are called（）.

A.floors
B.intercostals
C.stringers
D.tank top supports

5.單項選擇題Freeing ports on a vessel with soild bulwards（）.

A.prevent stress concentration in the bulwark
B.permit easy jettison of deck cargo in an emergency
C.provide opening through the bulwarks for mooring lines
D.allow water shipped on deck to flow off rapidly