單項選擇題A fire in a ballast pumproom can be brought under control with minimal impact on stability by().

A.cooling the outside bulkheads with water
B.shutting all sources of air into the compartment
C.closing the sea chest
D.flooding the compartment with salt water


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1.單項選擇題A fifteen-pound CO2 extinguisher().

A.contains 15 pounds of CO2
B.weighs 15 pounds when full of CO2
C.has 15 pounds of pressure at the nozzle
D.weighs 15 pounds when empty

3.單項選擇題Accumulations of oily rags should be().

A.kept in nonmetal containers
B.discarded as soon as possible
C.cleaned thoroughly for reuse
D.kept in the paint locker