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
单项选择题 Fire extinguishers used on ship’s are numbered by size I through V，with I being（）.
单项选择题 Fire dampers prevent the spread of fire by（）.
单项选择题 Fighting a rig fire in the ballast pumproom with hoses would adversely affect the stability of the rig most by（）.
