A.Leaves a residueB.Cost，relative to other agentsC.Brea……

单项选择题Which characteristic is an advantage of Halon as a fire extinguishing medium?（）

A.Electrically non-conductive
B.Relatively inexpensive
C.Effective against chemicals containing an oxidizer
D.All of the above

单项选择题Which action is routinely performed at the annual servicing and inspection of a dry-chemical cartridge-operated portable fire extinguisher?（）

A.Insure the chemical is powdery
B.Replace the cartridge
C.Pressure test the discharge hose
D.Test the pressure gauge for proper operation

单项选择题Where would you find the FCC authorization for transmitting on your ship’s EPIRB?（）

A.On the Ship Station License
B.On the side of the EPIRB transmitter
C.In the radio log
D.On the Certificate of Inspection

单项选择题Where should life jackets be stowed?（）.

A.In the forepeak
B.In the wheelhouse
C.Throughout the accommodation spaces
D.In locked watertight and fireproof containers on or above the main deck

单项选择题Where foam extinguishing systems are provided on a ship，each machinery flat in the protected space must have a(n)（）.

A.coaming
B.alarm
C.drain
D.fire sensor