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（）.
单项选择题 Each fire hose coupling on a ship must have threads that meet the specifications of the（）.
单项选择题 Each EPIRB required on an OSV shall be tested using the integrated test circuit and output indicator every（）.
