单项选择题
Which characteristic of Halon is a disadvantage when it is used as a fire extinguishing medium?（）
A.Leaves a residue
B.Cost，relative to other agents
C.Breaks down while under prolonged storage
D.Conducts electricity
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相关考题
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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
