单项选择题
A.Conduction of heat to adjacent surfaces B.Direct radiation C.Convection D.All of the above
Fire in an engine compartment is best extinguished with...
单项选择题Fire in an engine compartment is best extinguished with carbon dioxide gas (CO2) and by（）.
A.completely closing the compartment B.closing the compartment except for the ventilators C.leaving the compartment open to the air D.increasing the air flow to the compartment by blowers
Fire extinguishers used on ship’s are numbered by size ...
单项选择题Fire extinguishers used on ship’s are numbered by size I through V，with I being（）.
A.used for electrical fires only B.the smallest C.the most accessible D.the most effective
Fire dampers prevent the spread of fire by（）.A.convecti...
单项选择题Fire dampers prevent the spread of fire by（）.
A.convection B.conduction C.radiation D.direct contact
