單項(xiàng)選擇題

Each hose used for transferring vapors must（）.

A.have a design burst pressure of at least 25 psig
B.be capable of withstanding at least 2.0 psi vacuum without collapsing or constricting
C.be electrically continuous with a maximum resistance of ten thousand ohms
D.All of the above

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單項(xiàng)選擇題

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

單項(xiàng)選擇題

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

Each hose used for transferring vapors must（）.

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Each hand portable，semi-portable and fixed fire extinguishing unit on a ship must be tested and inspected at least once every（）.

Each hand portable fire extinguisher on a ship must be marked with（）.

Each hand portable，semi-portable and fixed fire extinguishing unit on a ship must be tested and inspected at least once every（）.