单项选择题
Each hand portable，semi-portable and fixed fire extinguishing unit on a ship must be tested and inspected at least once every（）.
A.six weeks
B.six months
C.twelve months
D.two years
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相关考题
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单项选择题
Each hand portable fire extinguisher on a ship must be marked with（）.
A.the name of the unit on which it is located
B.the date that it was installed on the unit
C.the names of the individuals qualified to use it
D.an identification number different from other extinguishers on the unit -
单项选择题
Each fire pump on a tanker must have a pressure gauge located at（）.
A.the pump discharge
B.the manifold connection
C.each fire station discharge
D.the pump station -
单项选择题
Each fire hose coupling on a ship must have threads that meet the specifications of the（）.
A.American Petroleum Institute
B.National Standard Fire hose Coupling
C.American Society of Mechanical Engineers
D.Underwriter's Laboratories，Inc
