单选题Floors aboard ship are（）.A frames to which the tank top and bottom shell are fastened on a double bottomed shipB transverse members of the ships frame which support the decksC longitudinal beams in the extreme bottom of a ship from which the ship's rib

If a fixed foam firefighting system on a ship is not of the premix type，a sample of the foam liquid must be tested by ______.

A.a Coast Guard inspection officer

B.the safety man aboard the unit

C.the designated person in charge of the unit

D.the manufacturer or his authorized representative

Where is the GMDSS Radio Logbook kept aboard ship?

A.Attached to the Deck Logbook

B.At the principal radio operating location

C.In the Chief Mate’s office

D.In the Master’s office

Which of the listed fire extinguishers cannot be easily recharged aboard ship?

A.Soda acid

B.Carbon dioxide

C.Dry chemical

D.cartridge-operated Foam

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

If a davit-launched liferaft aboard a ship cannot be launched because of damage to the davit，you should ______.

A.inflate the liferaft on deck

B.roll the liferaft over the side

C.go to another liferaft station

D.get a saw and cut the liferaft free

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

If your vessel is equipped with a radiotelephone，what must also be aboard?

A.Certificate of Inspection

B.List of ship stations

C.Copy of ship to shore channels

D.Radio station license